{"id":9299,"date":"2026-06-09T14:00:14","date_gmt":"2026-06-09T06:00:14","guid":{"rendered":"https:\/\/www.flywing-tech.com\/blog\/?p=9299"},"modified":"2026-06-09T14:00:17","modified_gmt":"2026-06-09T06:00:17","slug":"tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input","status":"publish","type":"post","link":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/","title":{"rendered":"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input"},"content":{"rendered":"<div class=\"fsc_text\">\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"introduction\"><\/span>Introduction<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The TP4056 or TPB4056 is one of the most widely used single-cell lithium battery charging ICs because of its simplicity, low cost, and easy integration into battery-powered electronics. From portable IoT devices and wearable electronics to DIY power banks and embedded systems, the TP4056 provides a convenient solution for charging lithium-ion and lithium-polymer batteries using standard USB power sources.<\/p>\n\n\n\n<p>Although numerous TP4056 modules are readily available, designing a reliable hardware implementation requires more than simply connecting a battery and USB connector. Proper input protection, charge current configuration, thermal management, PCB layout, battery protection circuitry, and power path considerations all play an important role in creating a safe and robust charging system.<\/p>\n\n\n\n<p>This guide provides a comprehensive hardware-focused approach to TP4056 circuit design, covering USB input implementation, protection circuits, charging current calculations, PCB layout recommendations, load-sharing techniques, and practical schematic examples. By the end of this guide, you will understand how to design a production-ready TP4056 charging circuit rather than simply using an off-the-shelf module.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/TP4056-IC.png-.png\" alt=\"TP4056 Lithium Battery Charger IC\" \/><figcaption class=\"wp-element-caption\"><em>TP4056 Lithium Battery Charger IC<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\r\n<div class=\"ez-toc-title-container\">\r\n<h2 class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/h2>\r\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #023a85;color:#023a85\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #023a85;color:#023a85\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\r\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#introduction\" >Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#understanding_tp4056_charger_ic\" >Understanding TP4056 Charger IC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#tp4056_battery_charging_ic_pinout\" >TP4056 Battery Charging IC Pinout<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#tp4056_pin_configuration_table\" >TP4056 Pin Configuration Table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#how_tp4056_charging_works\" >How TP4056 Charging Works<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#usb_input_design_for_tp4056\" >USB Input Design for TP4056<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#complete_tp4056_hardware_schematic_design\" >Complete TP4056 Hardware Schematic Design<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#minimum_required_components\" >Minimum Required Components<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#setting_charge_current_using_prog_resistor\" >Setting Charge Current Using PROG Resistor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#tp4056_charging_current_vs_rprog_value\" >TP4056 Charging Current vs RPROG Value<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#battery_protection_circuit_design\" >Battery Protection Circuit Design<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#thermal_design_considerations\" >Thermal Design Considerations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#charge_status_leds_design\" >Charge Status LEDs Design<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#recap_of_the_tp4056_charging_ic_module\" >Recap of the TP4056 Charging IC Module<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#frequently_asked_questions_faq\" >Frequently Asked Questions (FAQ)<\/a><\/li><\/ul><\/nav><\/div>\r\n\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"understanding_tp4056_charger_ic\"><\/span>Understanding TP4056 Charger IC<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The TP4056 is a complete constant-current and constant-voltage linear charger IC specifically designed for charging single-cell lithium-ion and lithium-polymer batteries. It is commonly used in portable electronics because it requires very few external components while providing a complete battery charging solution.<\/p>\n\n\n\n<p>Unlike complex switching battery chargers, the TP4056 uses a linear charging architecture, making circuit implementation straightforward and reducing design complexity. The IC can directly accept power from a standard 5V USB source, eliminating the need for additional charging controllers in many applications.<\/p>\n\n\n\n<p>The TP4056 operates using a standard CC\/CV (Constant Current \/ Constant Voltage) charging algorithm. During charging, the battery first receives a constant current until the battery voltage approaches the target charging voltage. The charger then gradually reduces charging current while maintaining a fixed output voltage to safely complete the charging process.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/Why-use-TP4056-charging-IC.png\" alt=\"Why use the TP4056 charging IC\" \/><figcaption class=\"wp-element-caption\"><em>Why use the TP4056 charging IC<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p>The IC is designed specifically for single-cell <a href=\"https:\/\/en.wikipedia.org\/wiki\/Lithium-ion_battery\">lithium batteries <\/a>with a final charging voltage of 4.2V and should not be used directly for multi-cell battery configurations without additional circuitry.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/Applications-of-TP4056-IC.png\" alt=\"Typical applications of the TP4056 Lithium battery charger IC\" \/><figcaption class=\"wp-element-caption\"><em>Typical applications of the TP4056 Lithium battery charger IC<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"tp4056_battery_charging_ic_pinout\"><\/span>TP4056 Battery Charging IC Pinout<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Understanding the function of each TP4056 pin is important before designing the charger circuit. Although the TP4056 requires only a few external components, proper implementation depends on correctly connecting each pin according to its intended function.<\/p>\n\n\n\n<p>The TP4056 is commonly available in an SOP-8 package and consists of several pins dedicated to power input, battery charging, current programming, control signals, and charging status outputs.<\/p>\n\n\n\n<h2 style=\"margin-bottom:20px\"><span class=\"ez-toc-section\" id=\"tp4056_pin_configuration_table\"><\/span>TP4056 Pin Configuration Table<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div style=\"border-radius:12px\">\n\n<table style=\"width:100%;border-collapse:collapse;font-family:Arial,sans-serif;background:#ffffff;overflow:hidden\">\n\n<thead>\n\n<tr style=\"background:#4F46E5;color:white\">\n\n<th style=\"padding:16px;text-align:left\">Pin Number<\/th>\n<th style=\"padding:16px;text-align:left\">Pin Name<\/th>\n<th style=\"padding:16px;text-align:left\">Type<\/th>\n<th style=\"padding:16px;text-align:left\">Function<\/th>\n\n<\/tr>\n\n<\/thead>\n\n<tbody>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\">1<\/td>\n<td style=\"padding:14px\"><strong>TEMP<\/strong><\/td>\n<td style=\"padding:14px\">Input<\/td>\n<td style=\"padding:14px\">Battery temperature monitoring input<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\">2<\/td>\n<td style=\"padding:14px\"><strong>PROG<\/strong><\/td>\n<td style=\"padding:14px\">Input<\/td>\n<td style=\"padding:14px\">Sets charging current using external resistor<\/td>\n<\/tr>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\">3<\/td>\n<td style=\"padding:14px\"><strong>GND<\/strong><\/td>\n<td style=\"padding:14px\">Power<\/td>\n<td style=\"padding:14px\">Ground reference connection<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\">4<\/td>\n<td style=\"padding:14px\"><strong>VCC<\/strong><\/td>\n<td style=\"padding:14px\">Power Input<\/td>\n<td style=\"padding:14px\">Input supply voltage (typically 5V USB)<\/td>\n<\/tr>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\">5<\/td>\n<td style=\"padding:14px\"><strong>BAT<\/strong><\/td>\n<td style=\"padding:14px\">Power Output<\/td>\n<td style=\"padding:14px\">Battery charging output connection<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\">6<\/td>\n<td style=\"padding:14px\"><strong>STDBY<\/strong><\/td>\n<td style=\"padding:14px\">Output<\/td>\n<td style=\"padding:14px\">Charge complete status indication<\/td>\n<\/tr>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\">7<\/td>\n<td style=\"padding:14px\"><strong>CHRG<\/strong><\/td>\n<td style=\"padding:14px\">Output<\/td>\n<td style=\"padding:14px\">Charging status indication<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\">8<\/td>\n<td style=\"padding:14px\"><strong>CE<\/strong><\/td>\n<td style=\"padding:14px\">Input<\/td>\n<td style=\"padding:14px\">Charger enable \/ disable control<\/td>\n<\/tr>\n\n<tr>\n<td style=\"padding:14px\">EP*<\/td>\n<td style=\"padding:14px\"><strong>Exposed Pad<\/strong><\/td>\n<td style=\"padding:14px\">Thermal<\/td>\n<td style=\"padding:14px\">Heat dissipation and ground connection<\/td>\n<\/tr>\n\n<\/tbody>\n\n<\/table>\n\n<\/div>\n\n<div style=\"margin-top:18px;padding:14px;background:#F3F4F6;border-left:4px solid #4F46E5;border-radius:8px\">\n\n<strong>Note:<\/strong> EP (Exposed Pad) exists only in packages that include a thermal pad and should typically be connected to ground for improved heat dissipation.\n\n<\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/TP4056-typical-application-circuit-.png\" alt=\"TP4056 typical application circuit\" \/><figcaption class=\"wp-element-caption\"><em>TP4056 typical application circuit<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"how_tp4056_charging_works\"><\/span>How TP4056 Charging Works<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The TP4056 charges lithium-ion and lithium-polymer batteries using a Constant Current \/ Constant Voltage (CC\/CV) charging algorithm. This charging method is widely used because it safely charges batteries while maximizing battery life and preventing overcharging.<\/p>\n\n\n\n<p>Instead of continuously supplying a fixed current throughout the charging cycle, the TP4056 automatically changes charging behavior depending on battery voltage and charging state<\/p>\n\n\n\n<p>The charging process can be divided into four major stages.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Precharge<\/h3>\n\n\n\n<p>When a deeply discharged battery is connected, immediately applying full charging current may damage the battery. To avoid this, the TP4056 first checks the battery voltage. If the battery voltage is below the internal threshold, the charger enters <strong>precharge mode<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Constant Current (CC) Charging Stage<\/h3>\n\n\n\n<p>After the battery exits precharge mode, the TP4056 enters constant-current charging mode. In this stage, the charger supplies a fixed charging current; the current is determined by the external PROG resistor, and the battery voltage continues to increase. This stage delivers most of the battery capacity and is generally the fastest part of the charging cycle.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Constant Voltage (CV) Charging Stage<\/h3>\n\n\n\n<p>Once the battery voltage approaches the target charging voltage (4.2V), the charger changes operating mode. During constant voltage mode, battery voltage is maintained at 4.2V, charging current decreases, and the battery reaches full capacity.  This stage prevents excessive voltage from being applied to the battery while allowing the remaining capacity to be filled.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Charge Termination<\/h3>\n\n\n\n<p>The TP4056 continuously monitors charging current during constant voltage operation. Charging automatically stops when the charging current falls below the termination threshold. At this point, CHRG pin status changes, STDBY output indicates completion, and battery charging stops automatically. Automatic termination prevents overcharging and improves battery lifespan.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/How-TP4056-charging-IC-works.png\" alt=\"TP4056 Charging IC working operation flow diagram\" \/><figcaption class=\"wp-element-caption\"><em>TP4056 Charging IC working operation flow diagram<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"usb_input_design_for_tp4056\"><\/span>USB Input Design for TP4056<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The TP4056 is commonly powered from USB sources because the IC is designed to operate from a 5V input supply. However, simply connecting a USB connector directly to the charger is not always sufficient for reliable operation. Proper USB input design helps improve charging stability, reduce noise, and protect the charger from input disturbances.<\/p>\n\n\n\n<p>The following sections explain how to properly design USB-powered TP4056 charging circuits using both Micro USB and <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/usb-dvi-hdmi-connectors-adam-tech-usb-c31-s-ra-cs1d-bk-t-r-3efe0b3c\">USB Type-C connectors.<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">USB Power Source Requirements<\/h3>\n\n\n\n<p>The TP4056 requires a stable input supply to maintain proper charging operation. Since most designs use USB power, understanding USB limitations is important when selecting charging current and designing the input stage.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Input Voltage Requirements<\/h4>\n\n\n\n<p>Typical TP4056 input requirements: recommended operating voltage is 4V\u20138V, and typical input voltage is<strong> <\/strong>5V USB supply. Using input voltages significantly above 5V increases power dissipation and heating.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Input Filtering Recommendations<\/h4>\n\n\n\n<p>To improve stability, place ceramic input capacitors close to the VUSB pin, use short power traces, and reduce cable resistance when using higher charging currents. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">USB Type-C Input Design<\/h3>\n\n\n\n<p>USB Type-C is increasingly replacing Micro USB because of improved mechanical reliability and wider availability.<\/p>\n\n\n\n<p>The TP4056 still requires only a 5V input supply, but USB Type-C connectors require additional configuration to properly request power.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Why CC Resistors Are Required<\/h4>\n\n\n\n<p>Unlike Micro USB, Type-C connectors do not automatically provide power unless proper configuration is detected. Configuration Channel (CC) pins, i.e., CC1 and CC2, must be configured, and pull-down resistors of 5.1K ohm indicate power sink behavior. Without these resistors, the USB-C power supplies may not provide output voltage.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Basic USB Type-C Implementation<\/h4>\n\n\n\n<p>For the simple design of TP4056, connect both CC pins through pull-down resistors, connect VBUS to the TP4056 input, and connect grounds. The typical resistor values are a 5.1k\u03a9 pull-down resistor on CC1 and a 5.1k\u03a9 pull-down resistor on CC2. The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/usb-dvi-hdmi-connectors-adam-tech-usb-c31-s-ra-cs1e-bk-t-r-66622990\">USB Type-C <\/a>circuit implementation is shown below. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/USB-TYPE-C-CIRCUIT.png\" alt=\"USB TYPE C circuit with CC1 and CC2 resistors\" \/><figcaption class=\"wp-element-caption\"><em>USB TYPE C circuit with CC1 and CC2 resistors<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.flywing-tech.com\/product-detail\/usb-dvi-hdmi-connectors-amphenol-icc-fci-10118194-0011lf-c2299559\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"2160\" height=\"270\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/10118194-0011lf.png\" alt=\"Amphenol ICC 10118194-0011LF USB 2.0 Micro-B receptacle connector \u2013 5 position right-angle specifications and technical support at Flywing\" class=\"wp-image-9382\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"complete_tp4056_hardware_schematic_design\"><\/span>Complete TP4056 Hardware Schematic Design<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>After understanding the charging mechanism and USB input design, the next step is creating a complete hardware implementation. A reliable TP4056 charging circuit requires more than simply connecting power and battery terminals. Proper component selection, filtering, protection circuitry, and layout considerations significantly improve reliability and charging performance. This section covers both the minimum working circuit and a recommended production-ready implementation.<\/p>\n\n\n\n<p>A basic circuit typically contains a TP4056 charger IC, an input capacitor, a programming resistor, a USB power input, and a lithium battery connection.<\/p>\n\n\n\n<h2 style=\"margin-bottom:20px\"><span class=\"ez-toc-section\" id=\"minimum_required_components\"><\/span>Minimum Required Components<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div style=\"border-radius:12px\">\n\n<table style=\"width:100%;border-collapse:collapse;font-family:Arial,sans-serif;background:#ffffff;overflow:hidden\">\n\n<thead>\n\n<tr style=\"background:#4F46E5;color:white\">\n\n<th style=\"padding:16px;text-align:left\">Component<\/th>\n<th style=\"padding:16px;text-align:left\">Typical Value<\/th>\n<th style=\"padding:16px;text-align:left\">Purpose<\/th>\n\n<\/tr>\n\n<\/thead>\n\n<tbody>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>Input Capacitor<\/strong><\/td>\n<td style=\"padding:14px\">1\u00b5F\u201310\u00b5F<\/td>\n<td style=\"padding:14px\">Input filtering<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>Battery Capacitor<\/strong><\/td>\n<td style=\"padding:14px\">1\u00b5F\u201310\u00b5F<\/td>\n<td style=\"padding:14px\">Output stability<\/td>\n<\/tr>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>PROG Resistor<\/strong><\/td>\n<td style=\"padding:14px\">Depends on charge current<\/td>\n<td style=\"padding:14px\">Sets charging current<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa\">\n<td style=\"padding:14px\"><strong>USB Connector<\/strong><\/td>\n<td style=\"padding:14px\">Micro USB \/ USB-C<\/td>\n<td style=\"padding:14px\">Input power source<\/td>\n<\/tr>\n\n<\/tbody>\n\n<\/table>\n\n<\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/TP4056-.png\" alt=\"TP4056 Charging IC circuit with USB Type C and Protection IC\" \/><figcaption class=\"wp-element-caption\"><em>TP4056 Charging IC circuit with USB Type C and Protection IC<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"setting_charge_current_using_prog_resistor\"><\/span>Setting Charge Current Using PROG Resistor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>One of the most useful features of the TP4056 is its adjustable charging current capability. Unlike fixed-current chargers, the TP4056 allows designers to configure charging current using only a single external resistor connected to the PROG pin.<\/p>\n\n\n\n<p>The TP4056 determines charging current using the external programming resistor (RPROG). The following table shows commonly used resistor values and their approximate charging currents.<\/p>\n\n\n\n<h2 style=\"margin-bottom:20px\"><span class=\"ez-toc-section\" id=\"tp4056_charging_current_vs_rprog_value\"><\/span>TP4056 Charging Current vs RPROG Value<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div style=\"border-radius:12px\">\n\n<table style=\"width:100%;border-collapse:collapse;font-family:Arial,sans-serif;background:#ffffff;overflow:hidden\">\n\n<thead>\n\n<tr style=\"background:#4F46E5;color:white\">\n\n<th style=\"padding:16px;text-align:left\">Charging Current<\/th>\n<th style=\"padding:16px;text-align:left\">RPROG Value<\/th>\n\n<\/tr>\n\n<\/thead>\n\n<tbody>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>100mA<\/strong><\/td>\n<td style=\"padding:14px\">12k\u03a9<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>130mA<\/strong><\/td>\n<td style=\"padding:14px\">10k\u03a9<\/td>\n<\/tr>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>250mA<\/strong><\/td>\n<td style=\"padding:14px\">4.8k\u03a9<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>300mA<\/strong><\/td>\n<td style=\"padding:14px\">4k\u03a9<\/td>\n<\/tr>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>500mA<\/strong><\/td>\n<td style=\"padding:14px\">2.4k\u03a9<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>600mA<\/strong><\/td>\n<td style=\"padding:14px\">2k\u03a9<\/td>\n<\/tr>\n\n<tr style=\"border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>800mA<\/strong><\/td>\n<td style=\"padding:14px\">1.5k\u03a9<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa;border-bottom:1px solid #eee\">\n<td style=\"padding:14px\"><strong>1000mA<\/strong><\/td>\n<td style=\"padding:14px\">1.2k\u03a9<\/td>\n<\/tr>\n\n<tr style=\"background:#fafafa\">\n<td style=\"padding:14px\"><strong>1200mA<\/strong><\/td>\n<td style=\"padding:14px\">1k\u03a9<\/td>\n<\/tr>\n\n<\/tbody>\n\n<\/table>\n\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"battery_protection_circuit_design\"><\/span>Battery Protection Circuit Design<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Although the TP4056 is capable of safely charging lithium batteries, the charger IC itself does <strong>not provide complete battery protection<\/strong>. Many beginners incorrectly assume that a TP4056 charger automatically protects the battery from all abnormal conditions, but this is not true.<\/p>\n\n\n\n<p>The TP4056 primarily controls the charging process. Additional circuitry is typically required to protect lithium batteries from dangerous operating conditions such as overcharging, excessive discharge, short circuits, and overcurrent events.<\/p>\n\n\n\n<p>For reliable and safe battery-powered designs, battery protection circuitry should be considered an essential part of the overall hardware design.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why Protection is Required<\/h3>\n\n\n\n<p>Lithium batteries require strict voltage and current limits because operating outside safe conditions can permanently damage the battery or create safety risks. Although TP4056 terminates charging, additional protection provides another safety layer.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Adding DW01 + MOSFET Protection Circuit<\/h3>\n\n\n\n<p>A common solution is adding a dedicated battery protection IC together with dual MOSFETs.  The most widely used implementation uses DW01 battery protection IC, Dual MOSFET package, and Battery monitoring circuitry. This protection circuit is commonly found on &#8220;TP4056 with protection&#8221; modules.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/Protection-circuit-.png\" alt=\"DW01A Protection Circuit\" \/><figcaption class=\"wp-element-caption\"><em>DW01A Protection Circuit<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"thermal_design_considerations\"><\/span>Thermal Design Considerations<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Thermal management is one of the most important aspects of TP4056 hardware design because the charger uses a linear charging architecture. Unlike switching regulators, linear chargers dissipate excess power as heat. Improper thermal design can cause excessive temperature rise, reduced charging current, slower charging speed, and unreliable operation.<\/p>\n\n\n\n<p>Many charging problems commonly attributed to defective chargers are actually thermal design problems. Understanding heat generation and proper PCB thermal design helps create a reliable charging circuit.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PCB Thermal Design Recommendations<\/h3>\n\n\n\n<p>Proper PCB layout significantly affects charging temperature. Larger copper areas improve heat spreading. It is recommended to connect the thermal pad t large copper region, increase copper around GND pins and avoid isolated thermal pads.<\/p>\n\n\n\n<p>Ground planes improve cooling by distributing heat across larger areas. Therefore, always use a solid ground plane and connect the thermal pad directly to the ground copper. Also, place vias beneath the thermal pad and use multiple small vias instead of one large via.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"charge_status_leds_design\"><\/span>Charge Status LEDs Design<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The TP4056 provides dedicated output pins for displaying charging status, allowing simple implementation of visual indicators without requiring additional control circuitry or microcontrollers.<\/p>\n\n\n\n<p>Charge status LEDs are useful because they provide immediate feedback about charger operation and battery charging state. Typical status indication allows users to quickly determine whether charging is active, whether charging has completed, and whether the charger is functioning correctly. <\/p>\n\n\n\n<p>The TP4056 provides two dedicated outputs for this purpose, such as the CHRG pin and STDBY pin. The CHRG output indicates when charging is actively occurring, and the STDBY pin indicates charging completion.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/LED-circuit.png\" alt=\"TP4056 Charger IC LED circuit design\" \/><figcaption class=\"wp-element-caption\"><em>TP4056 Charger IC LED circuit design<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"recap_of_the_tp4056_charging_ic_module\"><\/span>Recap of the TP4056 Charging IC Module<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The TP4056 is a widely used single-cell lithium-ion \/ lithium-polymer battery charging IC designed to simplify USB-based battery charging systems. It provides a complete linear charging solution with constant current (CC) and constant voltage (CV) control, making it highly popular in portable electronics, DIY projects, and embedded systems.<\/p>\n\n\n\n<p>At the core of its operation, the TP4056 manages the entire charging cycle automatically. It begins with precharge for deeply discharged batteries, then moves into constant current mode where the charging rate is set using the PROG resistor. As the battery voltage approaches 4.2V, it transitions into constant voltage mode, gradually reducing current until the battery is fully charged and safely terminating the charge cycle. This automated process eliminates the need for external control logic.<\/p>\n\n\n\n<p>In hardware design, proper implementation of USB input is essential for stable operation. Whether using Micro USB or USB Type-C, the design must ensure proper power delivery, input filtering, and in the case of USB-C, correct CC resistor configuration. These considerations help maintain reliable charging performance and protect the circuit from unstable power sources.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/TP4056-Working-operation.png\" alt=\"Hardware Design Setup of TP4056 Charging IC with Lithium Cell\" \/><figcaption class=\"wp-element-caption\"><em>Hardware Design Setup of TP4056 Charging IC with Lithium Cell<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"TP4056 - How it works?\" width=\"1778\" height=\"1000\" src=\"https:\/\/www.youtube.com\/embed\/b3iLWYAzLNk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The TP4056 is a practical and widely adopted solution for single-cell lithium-ion and lithium-polymer battery charging, especially in USB-powered electronic systems. Its built-in constant-current\/constant-voltage charging algorithm, minimal external component requirement, and automatic charge termination make it an ideal choice for compact and low-cost designs.<\/p>\n\n\n\n<p>However, a reliable TP4056-based system is not just about connecting a battery and USB supply. A proper hardware design must include careful consideration of USB input stability, correct charge current selection through the PROG resistor, and effective thermal management to handle power dissipation. These factors directly influence charging efficiency, safety, and long-term performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"frequently_asked_questions_faq\"><\/span>Frequently Asked Questions (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1780852786476\"><strong class=\"schema-faq-question\">Can TP4056 charge a 18650 battery?<\/strong> <p class=\"schema-faq-answer\">Yes, the TP4056 is commonly used to charge 18650 lithium-ion cells because they are single-cell 3.7V batteries. However, proper protection circuitry should be used for safe operation.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1780852803841\"><strong class=\"schema-faq-question\">Does TP4056 include battery protection?<\/strong> <p class=\"schema-faq-answer\">No, the standard TP4056 IC does not include full battery protection. Protection against over-discharge, short circuit, and overcurrent is usually added using a DW01 + dual MOSFET protection circuit.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1780852823068\"><strong class=\"schema-faq-question\">Can TP4056 be used while the load is connected?<\/strong> <p class=\"schema-faq-answer\">The basic TP4056 does not support proper load sharing. If a load is connected during charging, it may affect charge termination and battery behavior. A load-sharing or power-path circuit is recommended for such designs.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1780852836342\"><strong class=\"schema-faq-question\">What is the maximum charging current of TP4056?<\/strong> <p class=\"schema-faq-answer\">The charging current depends on the PROG resistor value. Typically, it can be set up to around 1A, but practical designs often use 500mA to 1A depending on thermal conditions and USB supply capability.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1780852853742\"><strong class=\"schema-faq-question\">Can TP4056 work with USB Type-C?<\/strong> <p class=\"schema-faq-answer\">Yes, TP4056 can work with USB Type-C as long as the input provides a regulated 5V supply. Proper CC resistors (usually 5.1k\u03a9) must be used to correctly configure the Type-C port as a power source.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1780852867949\"><strong class=\"schema-faq-question\">How do CHRG and STDBY pins work?<\/strong> <p class=\"schema-faq-answer\">CHRG indicates active charging (usually LOW during charging), while STDBY indicates charge completion (LOW when charging is finished). These pins are often used to drive LEDs.<\/p> <\/div> <\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.flywing-tech.com\/category\/connectors-interconnects\/usb-dvi-hdmi-connectors-5888498e\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"2160\" height=\"798\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/usb-dvi-hdmi-connector-assemblies-for-digital-connectivity.png\" alt=\"USB, DVI, and HDMI connector assemblies used for digital data transmission, video connectivity, and electronic device interfacing.\" class=\"wp-image-9383\" \/><\/a><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction The TP4056 or TPB4056 is one of the most widely used single-cell lithium battery charging ICs because of its simplicity, low cost, and easy integration into battery-powered electronics. From portable IoT devices and wearable electronics to DIY power banks and embedded systems, the TP4056 provides a convenient solution for charging lithium-ion and lithium-polymer batteries [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":9381,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1316,378,380],"tags":[1363,1368,1369,1373,1374,1372,1364,1325,1370,407,1362,1367,1366,1365,1371],"class_list":["post-9299","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-battery-charger-ics","category-parts-library","category-technical-tutorial","tag-battery-charging-circuit","tag-battery-protection-circuit","tag-constant-current-charger","tag-dw01-protection","tag-embedded-power-supply","tag-hardware-design-guide","tag-lithium-battery-charger","tag-lithium-ion-charger","tag-lithium-polymer-charger","tag-power-management-ic","tag-tp4056","tag-tp4056-circuit","tag-tp4056-design-guide","tag-usb-battery-charger","tag-usb-type-c-charging"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input - Fly-Wing<\/title>\r\n<meta name=\"description\" content=\"Complete TP4056 hardware design guide covering charger circuits, USB input design, battery protection, PCB layout, and charging current calculations.\" \/>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input - Fly-Wing\" \/>\r\n<meta property=\"og:description\" content=\"Complete TP4056 hardware design guide covering charger circuits, USB input design, battery protection, PCB layout, and charging current calculations.\" \/>\r\n<meta property=\"og:url\" content=\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/\" \/>\r\n<meta property=\"og:site_name\" content=\"Fly-Wing\" \/>\r\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=100090565081283\" \/>\r\n<meta property=\"article:published_time\" content=\"2026-06-09T06:00:14+00:00\" \/>\r\n<meta property=\"article:modified_time\" content=\"2026-06-09T06:00:17+00:00\" \/>\r\n<meta property=\"og:image\" content=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png\" \/>\r\n\t<meta property=\"og:image:width\" content=\"2610\" \/>\r\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\r\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\r\n<meta name=\"author\" content=\"Flywing Tech Blog\" \/>\r\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\r\n<meta name=\"twitter:creator\" content=\"@MIKEBigcoolguy\" \/>\r\n<meta name=\"twitter:site\" content=\"@MIKEBigcoolguy\" \/>\r\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Flywing Tech Blog\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"13 minutes\" \/>\r\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/\"},\"author\":{\"name\":\"Flywing Tech Blog\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/person\/24e9d7441f492ede21082c2c6b8bc385\"},\"headline\":\"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input\",\"datePublished\":\"2026-06-09T06:00:14+00:00\",\"dateModified\":\"2026-06-09T06:00:17+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/\"},\"wordCount\":2357,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png\",\"keywords\":[\"Battery Charging Circuit\",\"Battery Protection Circuit\",\"Constant Current Charger\",\"DW01 Protection\",\"Embedded Power Supply\",\"Hardware Design Guide\",\"Lithium Battery Charger\",\"Lithium Ion Charger\",\"Lithium Polymer Charger\",\"Power Management IC\",\"TP4056\",\"TP4056 Circuit\",\"TP4056 Design Guide\",\"USB Battery Charger\",\"USB Type-C Charging\"],\"articleSection\":[\"Battery Charger ICs\",\"Parts Library\",\"Tutorials\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#respond\"]}]},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/\",\"url\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/\",\"name\":\"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input - Fly-Wing\",\"isPartOf\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png\",\"datePublished\":\"2026-06-09T06:00:14+00:00\",\"dateModified\":\"2026-06-09T06:00:17+00:00\",\"description\":\"Complete TP4056 hardware design guide covering charger circuits, USB input design, battery protection, PCB layout, and charging current calculations.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852786476\"},{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852803841\"},{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852823068\"},{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852836342\"},{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852853742\"},{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852867949\"}],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#primaryimage\",\"url\":\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png\",\"contentUrl\":\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png\",\"width\":2610,\"height\":1200,\"caption\":\"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.flywing-tech.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Parts Library\",\"item\":\"https:\/\/www.flywing-tech.com\/blog\/category\/parts-library\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#website\",\"url\":\"https:\/\/www.flywing-tech.com\/blog\/\",\"name\":\"Fly-Wing\",\"description\":\"Electronic Components Source @Fly-Wing\",\"publisher\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.flywing-tech.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#organization\",\"name\":\"Fly-wing Technology (HK) Co., Limited\",\"alternateName\":\"Fly-wing Technology\",\"url\":\"https:\/\/www.flywing-tech.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2025\/06\/512_512.png\",\"contentUrl\":\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2025\/06\/512_512.png\",\"width\":512,\"height\":512,\"caption\":\"Fly-wing Technology (HK) Co., Limited\"},\"image\":{\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/profile.php?id=100090565081283\",\"https:\/\/x.com\/MIKEBigcoolguy\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/person\/24e9d7441f492ede21082c2c6b8bc385\",\"name\":\"Flywing Tech Blog\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/92aaf04814857a3c97be0791ca944c6955a101913a1e5e41ada1c60bc300472b?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/92aaf04814857a3c97be0791ca944c6955a101913a1e5e41ada1c60bc300472b?s=96&d=mm&r=g\",\"caption\":\"Flywing Tech Blog\"},\"description\":\"This blog is maintained by the editorial team at Fly-Wing Technology. We aim to share valuable insights on electronic components, industry trends, and practical engineering guides to support global developers and buyers.\",\"sameAs\":[\"https:\/\/www.flywing-tech.com\/blog\/\"],\"url\":\"https:\/\/www.flywing-tech.com\/blog\/author\/content_manager_01\/\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852786476\",\"position\":1,\"url\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852786476\",\"name\":\"Can TP4056 charge a 18650 battery?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the TP4056 is commonly used to charge 18650 lithium-ion cells because they are single-cell 3.7V batteries. However, proper protection circuitry should be used for safe operation.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852803841\",\"position\":2,\"url\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852803841\",\"name\":\"Does TP4056 include battery protection?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, the standard TP4056 IC does not include full battery protection. Protection against over-discharge, short circuit, and overcurrent is usually added using a DW01 + dual MOSFET protection circuit.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852823068\",\"position\":3,\"url\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852823068\",\"name\":\"Can TP4056 be used while the load is connected?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The basic TP4056 does not support proper load sharing. If a load is connected during charging, it may affect charge termination and battery behavior. A load-sharing or power-path circuit is recommended for such designs.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852836342\",\"position\":4,\"url\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852836342\",\"name\":\"What is the maximum charging current of TP4056?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The charging current depends on the PROG resistor value. Typically, it can be set up to around 1A, but practical designs often use 500mA to 1A depending on thermal conditions and USB supply capability.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852853742\",\"position\":5,\"url\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852853742\",\"name\":\"Can TP4056 work with USB Type-C?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, TP4056 can work with USB Type-C as long as the input provides a regulated 5V supply. Proper CC resistors (usually 5.1k\u03a9) must be used to correctly configure the Type-C port as a power source.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852867949\",\"position\":6,\"url\":\"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852867949\",\"name\":\"How do CHRG and STDBY pins work?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CHRG indicates active charging (usually LOW during charging), while STDBY indicates charge completion (LOW when charging is finished). These pins are often used to drive LEDs.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"}]}<\/script>\r\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input - Fly-Wing","description":"Complete TP4056 hardware design guide covering charger circuits, USB input design, battery protection, PCB layout, and charging current calculations.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/","og_locale":"en_US","og_type":"article","og_title":"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input - Fly-Wing","og_description":"Complete TP4056 hardware design guide covering charger circuits, USB input design, battery protection, PCB layout, and charging current calculations.","og_url":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/","og_site_name":"Fly-Wing","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=100090565081283","article_published_time":"2026-06-09T06:00:14+00:00","article_modified_time":"2026-06-09T06:00:17+00:00","og_image":[{"width":2610,"height":1200,"url":"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png","type":"image\/png"}],"author":"Flywing Tech Blog","twitter_card":"summary_large_image","twitter_creator":"@MIKEBigcoolguy","twitter_site":"@MIKEBigcoolguy","twitter_misc":{"Written by":"Flywing Tech Blog","Est. reading time":"13 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#article","isPartOf":{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/"},"author":{"name":"Flywing Tech Blog","@id":"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/person\/24e9d7441f492ede21082c2c6b8bc385"},"headline":"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input","datePublished":"2026-06-09T06:00:14+00:00","dateModified":"2026-06-09T06:00:17+00:00","mainEntityOfPage":{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/"},"wordCount":2357,"commentCount":0,"publisher":{"@id":"https:\/\/www.flywing-tech.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#primaryimage"},"thumbnailUrl":"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png","keywords":["Battery Charging Circuit","Battery Protection Circuit","Constant Current Charger","DW01 Protection","Embedded Power Supply","Hardware Design Guide","Lithium Battery Charger","Lithium Ion Charger","Lithium Polymer Charger","Power Management IC","TP4056","TP4056 Circuit","TP4056 Design Guide","USB Battery Charger","USB Type-C Charging"],"articleSection":["Battery Charger ICs","Parts Library","Tutorials"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#respond"]}]},{"@type":["WebPage","FAQPage"],"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/","url":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/","name":"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input - Fly-Wing","isPartOf":{"@id":"https:\/\/www.flywing-tech.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#primaryimage"},"image":{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#primaryimage"},"thumbnailUrl":"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png","datePublished":"2026-06-09T06:00:14+00:00","dateModified":"2026-06-09T06:00:17+00:00","description":"Complete TP4056 hardware design guide covering charger circuits, USB input design, battery protection, PCB layout, and charging current calculations.","breadcrumb":{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852786476"},{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852803841"},{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852823068"},{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852836342"},{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852853742"},{"@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852867949"}],"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#primaryimage","url":"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png","contentUrl":"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/06\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input.png","width":2610,"height":1200,"caption":"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input"},{"@type":"BreadcrumbList","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.flywing-tech.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Parts Library","item":"https:\/\/www.flywing-tech.com\/blog\/category\/parts-library\/"},{"@type":"ListItem","position":3,"name":"TP4056 Complete Hardware Design Guide with Protection Circuit and USB Input"}]},{"@type":"WebSite","@id":"https:\/\/www.flywing-tech.com\/blog\/#website","url":"https:\/\/www.flywing-tech.com\/blog\/","name":"Fly-Wing","description":"Electronic Components Source @Fly-Wing","publisher":{"@id":"https:\/\/www.flywing-tech.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.flywing-tech.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.flywing-tech.com\/blog\/#organization","name":"Fly-wing Technology (HK) Co., Limited","alternateName":"Fly-wing Technology","url":"https:\/\/www.flywing-tech.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2025\/06\/512_512.png","contentUrl":"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2025\/06\/512_512.png","width":512,"height":512,"caption":"Fly-wing Technology (HK) Co., Limited"},"image":{"@id":"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=100090565081283","https:\/\/x.com\/MIKEBigcoolguy"]},{"@type":"Person","@id":"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/person\/24e9d7441f492ede21082c2c6b8bc385","name":"Flywing Tech Blog","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.flywing-tech.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/92aaf04814857a3c97be0791ca944c6955a101913a1e5e41ada1c60bc300472b?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/92aaf04814857a3c97be0791ca944c6955a101913a1e5e41ada1c60bc300472b?s=96&d=mm&r=g","caption":"Flywing Tech Blog"},"description":"This blog is maintained by the editorial team at Fly-Wing Technology. We aim to share valuable insights on electronic components, industry trends, and practical engineering guides to support global developers and buyers.","sameAs":["https:\/\/www.flywing-tech.com\/blog\/"],"url":"https:\/\/www.flywing-tech.com\/blog\/author\/content_manager_01\/"},{"@type":"Question","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852786476","position":1,"url":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852786476","name":"Can TP4056 charge a 18650 battery?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes, the TP4056 is commonly used to charge 18650 lithium-ion cells because they are single-cell 3.7V batteries. However, proper protection circuitry should be used for safe operation.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852803841","position":2,"url":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852803841","name":"Does TP4056 include battery protection?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"No, the standard TP4056 IC does not include full battery protection. Protection against over-discharge, short circuit, and overcurrent is usually added using a DW01 + dual MOSFET protection circuit.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852823068","position":3,"url":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852823068","name":"Can TP4056 be used while the load is connected?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The basic TP4056 does not support proper load sharing. If a load is connected during charging, it may affect charge termination and battery behavior. A load-sharing or power-path circuit is recommended for such designs.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852836342","position":4,"url":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852836342","name":"What is the maximum charging current of TP4056?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The charging current depends on the PROG resistor value. Typically, it can be set up to around 1A, but practical designs often use 500mA to 1A depending on thermal conditions and USB supply capability.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852853742","position":5,"url":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852853742","name":"Can TP4056 work with USB Type-C?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes, TP4056 can work with USB Type-C as long as the input provides a regulated 5V supply. Proper CC resistors (usually 5.1k\u03a9) must be used to correctly configure the Type-C port as a power source.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852867949","position":6,"url":"https:\/\/www.flywing-tech.com\/blog\/tp4056-complete-hardware-design-guide-with-protection-circuit-and-usb-input\/#faq-question-1780852867949","name":"How do CHRG and STDBY pins work?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"CHRG indicates active charging (usually LOW during charging), while STDBY indicates charge completion (LOW when charging is finished). These pins are often used to drive LEDs.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/posts\/9299","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/comments?post=9299"}],"version-history":[{"count":47,"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/posts\/9299\/revisions"}],"predecessor-version":[{"id":9385,"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/posts\/9299\/revisions\/9385"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/media\/9381"}],"wp:attachment":[{"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/media?parent=9299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/categories?post=9299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.flywing-tech.com\/blog\/wp-json\/wp\/v2\/tags?post=9299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}