{"id":9574,"date":"2026-07-06T15:01:48","date_gmt":"2026-07-06T07:01:48","guid":{"rendered":"https:\/\/www.flywing-tech.com\/blog\/?p=9574"},"modified":"2026-07-06T15:01:51","modified_gmt":"2026-07-06T07:01:51","slug":"how-to-design-smart-battery-monitoring-systems-using-max17048","status":"publish","type":"post","link":"https:\/\/www.flywing-tech.com\/blog\/how-to-design-smart-battery-monitoring-systems-using-max17048\/","title":{"rendered":"How to Design Smart Battery Monitoring Systems Using MAX17048"},"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>Modern portable electronic devices have become increasingly dependent on rechargeable lithium-ion (Li-ion) and lithium-polymer (Li-Po) batteries. From wearable electronics and wireless sensors to industrial handheld equipment and medical devices, battery-powered products are expected to operate longer, charge faster, and provide users with accurate information about the remaining battery capacity.<\/p>\n\n\n\n<p>However, simply measuring the battery voltage is no longer sufficient for modern battery-powered applications. The battery voltage changes nonlinearly during charging and discharging, making it difficult to accurately estimate the remaining battery percentage using voltage alone. As batteries age, their characteristics also change. Therefore, reducing the accuracy of traditional voltage-based battery estimation methods. This is where a battery fuel gauge IC MAX17048, comes into play!<\/p>\n\n\n\n<p>The<a href=\"https:\/\/www.flywing-tech.com\/product-detail\/pmic-battery-management-maxim-integrated-max17048g-t10-7f22da60\"> MAX17048 is an ultra-low-power battery fuel gauge IC<\/a>, which is used to estimate the State of Charge (SoC) of single-cell lithium-ion and lithium-polymer batteries. Due to its small footprint, low power consumption, and simple two-wire I2C interface, MAX17048 is widely used by design engineers for battery-powered embedded systems such as smart watches, smart glasses, and battery-powered earphones. It can be easily integrated with popular microcontrollers such as the <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/rf-transceiver-modules-espressif-systems-esp32-wroom-32u-8mb-12b83270\">ESP32<\/a>, <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/embedded-microcontrollers-stmicroelectronics-stm32f302cbt7-1e82279c\">STM32,<\/a> and Arduino using the I2C protocol. A simple block diagram of a battery-powered embedded system using a MAX17048 is shown below.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.flywing-tech.com\/blog\/wp-content\/uploads\/2026\/07\/Battery-powered-system-block-diagram-using-MAX17048.png\" alt=\"Battery-powered system block diagram using MAX17048\" \/><\/figure>\n\n\n\n<p>Whether you&#8217;re developing an IoT device, portable medical equipment, wearable electronics, GPS tracker, wireless sensor, or any battery-powered embedded system, this guide will provide the practical knowledge needed to successfully integrate the MAX17048 into your next hardware design.<\/p>\n\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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#what_is_the_max17048\" >What is the MAX17048?<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#understanding_smart_battery_monitoring_systems\" >Understanding Smart Battery Monitoring Systems<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#how_max17048_works\" >How MAX17048 Works<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#max17048_pinout_and_functional_description\" >MAX17048 Pinout and Functional Description<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#hardware_design_requirements\" >Hardware Design Requirements<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#typical_hardware_schematics_guideline_for_max17048\" >Typical Hardware Schematics Guideline for MAX17048<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#smart_watch_design_real-world_design_example\" >Smart Watch Design: Real-World Design Example<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#pcb_layout_guidelines_for_max17048\" >PCB Layout Guidelines for MAX17048<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#real-world_applications_of_max17048\" >Real-World Applications of MAX17048<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#conclusion\" >Conclusion<\/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\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#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=\"what_is_the_max17048\"><\/span>What is the MAX17048?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The MAX17048 is an ultra-low-power battery fuel gauge integrated circuit (IC) developed by Analog Devices. It is designed to monitor the remaining capacity of a single-cell lithium-ion (Li-ion) or lithium-polymer (Li-Po) battery and provide an accurate estimate of the battery&#8217;s State of Charge (SOC). The MAX17048 is known for its miniature size footprint, minimum external components, and simple 2-wire I2C interface (SDA and SCL) to communicate with a host microcontroller like STM32 or ESP32.<\/p>\n\n\n\n<p>This state estimation is highly demanded in consumer electronics and wearable electronic products such as IoT products, portable medical equipment, GPS trackers, and handheld consumer devices.<\/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\/07\/MAX17048-Battery-Fuel-Guage-IC-application-circuit.png\" alt=\"MAX17048 Battery Fuel Guage IC application circuit\" \/><figcaption class=\"wp-element-caption\"><em>MAX17048 Battery Fuel Guage IC application circuit<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"understanding_smart_battery_monitoring_systems\"><\/span>Understanding Smart Battery Monitoring Systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A smart battery monitoring system is an electronic system designed to continuously monitor a battery&#8217;s condition and provide accurate information about its remaining capacity and operating status. Instead of relying solely on battery voltage, it uses a dedicated battery fuel gauge IC to analyze battery characteristics and estimate parameters such as the State of Charge (SOC).<\/p>\n\n\n\n<p>This information is then communicated to a host microcontroller, allowing the system to display the remaining battery percentage, generate low-battery alerts, optimize power consumption, and improve the overall reliability of battery-powered devices.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Traditional Battery Monitoring vs. Smart Battery Monitoring<\/h3>\n\n\n\n<p>Many low-cost battery-powered devices estimate the remaining battery capacity by measuring battery voltage. Although this method is simple and inexpensive, it often produces inaccurate results because the discharge curve of a lithium-ion battery is not linear. Battery voltage is also influenced by temperature, load current, and battery aging.<\/p>\n\n\n\n<div style=\"margin:20px 0\">\n\n<table style=\"width:100%;border-collapse:collapse;font-family:Arial,Helvetica,sans-serif;min-width:700px\">\n\n<tr style=\"background:#1565c0;color:white\">\n<th style=\"padding:12px;border:1px solid #ddd\">Feature<\/th>\n<th style=\"padding:12px;border:1px solid #ddd\">Traditional Voltage Monitoring<\/th>\n<th style=\"padding:12px;border:1px solid #ddd\">Smart Battery Monitoring<\/th>\n<\/tr>\n\n<tr>\n<td style=\"padding:12px;border:1px solid #ddd\"><strong>Battery Percentage Accuracy<\/strong><\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center\">Low<\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center\">High<\/td>\n<\/tr>\n\n<tr style=\"background:#f8f9fc\">\n<td style=\"padding:12px;border:1px solid #ddd\"><strong>Voltage Measurement<\/strong><\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:green\">\u2714<\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:green\">\u2714<\/td>\n<\/tr>\n\n<tr>\n<td style=\"padding:12px;border:1px solid #ddd\"><strong>State of Charge (SOC) Estimation<\/strong><\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:red\">\u2718<\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:green\">\u2714<\/td>\n<\/tr>\n\n<tr style=\"background:#f8f9fc\">\n<td style=\"padding:12px;border:1px solid #ddd\"><strong>Low Battery Alerts<\/strong><\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:#d17b00\"><strong>Limited<\/strong><\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:green\">\u2714<\/td>\n<\/tr>\n\n<tr>\n<td style=\"padding:12px;border:1px solid #ddd\"><strong>Compensation for Battery Characteristics<\/strong><\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:red\">\u2718<\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:green\">\u2714<\/td>\n<\/tr>\n\n<tr style=\"background:#f8f9fc\">\n<td style=\"padding:12px;border:1px solid #ddd\"><strong>Suitable for Modern Portable Devices<\/strong><\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:#d17b00\"><strong>Limited<\/strong><\/td>\n<td style=\"padding:12px;border:1px solid #ddd;text-align:center;color:green\">\u2714<\/td>\n<\/tr>\n\n<\/table>\n\n<\/div>\n\n<p style=\"text-align:center;font-style:italic\">\n<strong>Table 1.<\/strong> Comparison between traditional voltage-based battery monitoring and smart battery monitoring using a fuel gauge IC such as the MAX17048.\n<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Applications of Smart Battery Monitoring Systems<\/h3>\n\n\n\n<p>Smart battery monitoring systems are widely used in products that rely on rechargeable batteries and require accurate battery information. Common applications include:<\/p>\n\n\n\n<div style=\"border:2px solid #dbeafe;border-radius:12px;padding:25px;background:#f8fbff;margin:25px 0\">\n\n<h3 style=\"margin-top:0;color:#1565c0;font-size:28px;text-align:center\">\n\ud83d\udd0b Common Applications of Smart Battery Monitoring\n<\/h3>\n\n<p style=\"font-size:16px;line-height:1.8;color:#444;text-align:center\">\nSmart battery monitoring systems are widely used in products that rely on rechargeable batteries and require accurate battery information. Common applications include:\n<\/p>\n\n<div style=\"grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:15px;margin-top:25px\">\n\n<div style=\"background:#ffffff;border-left:5px solid #2196f3;padding:15px;border-radius:8px\">\ud83c\udf10 <strong>Internet of Things (IoT) Devices<\/strong><\/div>\n\n<div style=\"background:#ffffff;border-left:5px solid #9c27b0;padding:15px;border-radius:8px\">\u231a <strong>Wearable Electronics<\/strong><\/div>\n\n<div style=\"background:#ffffff;border-left:5px solid #f44336;padding:15px;border-radius:8px\">\ud83c\udfe5 <strong>Portable Medical Equipment<\/strong><\/div>\n\n<div style=\"background:#ffffff;border-left:5px solid #ff9800;padding:15px;border-radius:8px\">\ud83d\udccd <strong>GPS Tracking Devices<\/strong><\/div>\n\n<div style=\"background:#ffffff;border-left:5px solid #009688;padding:15px;border-radius:8px\">\ud83d\udee0\ufe0f <strong>Handheld Industrial Instruments<\/strong><\/div>\n\n<div style=\"background:#ffffff;border-left:5px solid #4caf50;padding:15px;border-radius:8px\">\ud83c\udfe0 <strong>Smart Home Products<\/strong><\/div>\n\n<div style=\"background:#ffffff;border-left:5px solid #3f51b5;padding:15px;border-radius:8px\">\ud83d\udcf1 <strong>Consumer Electronics<\/strong><\/div>\n\n<div style=\"background:#ffffff;border-left:5px solid #00bcd4;padding:15px;border-radius:8px\">\ud83d\udce1 <strong>Wireless Sensor Nodes<\/strong><\/div>\n\n<div style=\"background:#ffffff;border-left:5px solid #795548;padding:15px;border-radius:8px\">\ud83d\udcca <strong>Portable Test and Measurement Equipment<\/strong><\/div>\n\n<\/div>\n\n\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"how_max17048_works\"><\/span>How MAX17048 Works<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The MAX17048 battery SoC monitoring IC works on the fuel-gauge algorithm. Unlike traditional battery fuel gauges that rely on coulomb counting, the MAX17048 continuously monitors the battery voltage and applies an advanced mathematical battery model to determine the remaining battery capacity. <\/p>\n\n\n\n<p>The heart of MAX17048 is the Model Gauge Algorithm, which compares real-time battery voltage with an internal battery model. By considering factors such as battery chemistry, discharge characteristics, and voltage response, the algorithm accurately estimates the battery&#8217;s State of Charge (SOC), even during varying load conditions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">State of Charge (SOC) Calculation<\/h3>\n\n\n\n<p>ModelGauge algorithm, the MAX17048 calculates the battery&#8217;s State of Charge (SOC). The SOC value represents the remaining battery capacity as a percentage, ranging from 0% (fully discharged) to 100% (fully charged). This information is stored in internal registers and can be read by a host microcontroller through the I\u00b2C interface. <\/p>\n\n\n\n<p>Many wearable and smart devices, such as smartphones, smart watches, glasses, portable medical equipment, GPS trackers, and IoT devices, use this SOC value to display accurate battery level indicators. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Low Battery Alert Function<\/h3>\n\n\n\n<p>The MAX17048 includes an integrated low-battery alert feature that notifies the system when the battery reaches a predefined charge level. When the battery capacity falls below the programmed threshold, the ALRT pin is asserted, allowing the host microcontroller, such as an STM32 or an ESP32, to respond immediately.<\/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\/07\/How-MAX17048-Fuel-Guage-IC-works-.png\" alt=\"How MAX17048 Fuel Guage IC works\" \/><figcaption class=\"wp-element-caption\"><em>How MAX17048 Fuel Guage IC works<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"max17048_pinout_and_functional_description\"><\/span>MAX17048 Pinout and Functional Description<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/pmic-battery-management-maxim-integrated-max17048x-20ec40e5\">MAX17048 is available in an 8-pin TDFN package and an 8-bump WLP package,<\/a> making it suitable for compact battery-powered devices. Each pin performs a specific function related to battery voltage monitoring, power management, I\u00b2C communication, and system alerts. Understanding the pin functions is essential for designing a reliable battery fuel gauge circuit and ensuring accurate battery State of Charge (SOC) measurements.<\/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\/07\/MAX17048-.png\" alt=\"\" \/><figcaption class=\"wp-element-caption\">MAX17048 typical IC package from Analog devices<\/figcaption><\/figure>\n<\/div>\n\n\n<div style=\"margin:25px 0\">\n\n<h3 style=\"background:#1565c0;color:#fff;padding:14px;border-radius:8px 8px 0 0;margin:0;text-align:center;font-family:Arial,sans-serif\">\nMAX17048 Pin Configuration\n<\/h3>\n\n<table style=\"width:100%;border-collapse:collapse;font-family:Arial,Helvetica,sans-serif\">\n\n<thead>\n\n<tr style=\"background:#e8f1ff\">\n\n<th style=\"width:8%;padding:10px;border:1px solid #d9e2ec\">Pin<\/th>\n\n<th style=\"width:12%;padding:10px;border:1px solid #d9e2ec\">Name<\/th>\n\n<th style=\"width:18%;padding:10px;border:1px solid #d9e2ec\">Type<\/th>\n\n<th style=\"width:62%;padding:10px;border:1px solid #d9e2ec\">Functional Description<\/th>\n\n<\/tr>\n\n<\/thead>\n\n<tbody>\n\n<tr style=\"background:#fcfdff\">\n<td style=\"text-align:center;padding:10px;border:1px solid #d9e2ec\"><strong>1<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec\"><strong>CTG<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;color:#555\">\u26ab Ground<\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;line-height:1.6\">Connect directly to <strong>GND<\/strong> during normal operation. Used internally by the MAX17048.<\/td>\n<\/tr>\n\n<tr style=\"background:#f4f9ff\">\n<td style=\"text-align:center;padding:10px;border:1px solid #d9e2ec\"><strong>2<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec\"><strong>CELL<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;color:#1565c0\">\ud83d\udd35 Analog Input<\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;line-height:1.6\">Connect to the positive terminal of the single-cell Li-ion\/Li-Po battery to accurately measure battery voltage.<\/td>\n<\/tr>\n\n<tr style=\"background:#fcfdff\">\n<td style=\"text-align:center;padding:10px;border:1px solid #d9e2ec\"><strong>3<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec\"><strong>VDD<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;color:#d18b00\">\ud83d\udfe1 Power Input<\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;line-height:1.6\">Power supply input (<strong>2.5 V\u20134.5 V<\/strong>). Place a <strong>0.1 \u00b5F bypass capacitor<\/strong> between VDD and GND.<\/td>\n<\/tr>\n\n<tr style=\"background:#f4f9ff\">\n<td style=\"text-align:center;padding:10px;border:1px solid #d9e2ec\"><strong>4<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec\"><strong>GND<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;color:#555\">\u26ab Ground<\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;line-height:1.6\">Ground reference for the IC. Connect to the battery negative terminal and the system ground.<\/td>\n<\/tr>\n\n<tr style=\"background:#fcfdff\">\n<td style=\"text-align:center;padding:10px;border:1px solid #d9e2ec\"><strong>5<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec\"><strong>ALRT<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;color:#2e7d32\">\ud83d\udfe2 Digital Output<\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;line-height:1.6\">Open-drain, active-low alert output that signals low battery SOC or other programmed alert conditions to the host MCU.<\/td>\n<\/tr>\n\n<tr style=\"background:#f4f9ff\">\n<td style=\"text-align:center;padding:10px;border:1px solid #d9e2ec\"><strong>6<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec\"><strong>QSTRT<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;color:#2e7d32\">\ud83d\udfe2 Digital Input<\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;line-height:1.6\">Quick-Start input used to restart the fuel gauge algorithm. Connect to GND if the feature is not required.<\/td>\n<\/tr>\n\n<tr style=\"background:#fcfdff\">\n<td style=\"text-align:center;padding:10px;border:1px solid #d9e2ec\"><strong>7<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec\"><strong>SCL<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;color:#2e7d32\">\ud83d\udfe2 Digital Input<\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;line-height:1.6\">I\u00b2C serial clock line used for communication with the host microcontroller.<\/td>\n<\/tr>\n\n<tr style=\"background:#f4f9ff\">\n<td style=\"text-align:center;padding:10px;border:1px solid #d9e2ec\"><strong>8<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec\"><strong>SDA<\/strong><\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;color:#7b1fa2\">\ud83d\udfe3 Bidirectional I\/O<\/td>\n<td style=\"padding:10px;border:1px solid #d9e2ec;line-height:1.6\">I\u00b2C serial data line used to read battery voltage, State of Charge (SOC), status, and configuration registers.<\/td>\n<\/tr>\n\n<\/tbody>\n\n<\/table>\n\n<\/div>\n\n<p style=\"text-align:center;font-style:italic;color:#666;margin-top:12px\">\n<strong>Table 2.<\/strong> MAX17048 pin configuration and functional description.\n<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"hardware_design_requirements\"><\/span>Hardware Design Requirements<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Designing a reliable battery monitoring circuit with the MAX17048 requires more than simply connecting the IC to a battery. However, Proper hardware design practices ensure accurate battery voltage measurement, stable I\u00b2C communication, low power consumption, and reliable operation under different environmental and electrical conditions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Battery Requirements<\/h3>\n\n\n\n<p>The MAX17048 is specifically designed for single-cell Lithium-Ion (Li-ion) and Lithium-Polymer (Li-Po) rechargeable batteries.<\/p>\n\n\n\n<div style=\"margin:30px 0;border:1px solid #d6e4f0;border-radius:10px;overflow:hidden;font-family:Arial,Helvetica,sans-serif\">\n\n<div style=\"background:#1565c0;color:#ffffff;padding:15px;text-align:center\">\n<h3 style=\"margin:0;color:#ffffff\">\ud83d\udd0b Recommended Battery Specifications<\/h3>\n<\/div>\n\n<table style=\"width:100%;border-collapse:collapse\">\n\n<tr style=\"background:#f8fbff\">\n<td style=\"width:35%;padding:14px;border:1px solid #e3eaf2;font-weight:bold;color:#1565c0\">\nBattery Type\n<\/td>\n<td style=\"padding:14px;border:1px solid #e3eaf2\">\nSingle-cell Li-ion or Li-Po\n<\/td>\n<\/tr>\n\n<tr>\n<td style=\"padding:14px;border:1px solid #e3eaf2;font-weight:bold;color:#1565c0\">\nNominal Voltage\n<\/td>\n<td style=\"padding:14px;border:1px solid #e3eaf2\">\n3.7 V\n<\/td>\n<\/tr>\n\n<tr style=\"background:#f8fbff\">\n<td style=\"padding:14px;border:1px solid #e3eaf2;font-weight:bold;color:#1565c0\">\nFully Charged Voltage\n<\/td>\n<td style=\"padding:14px;border:1px solid #e3eaf2\">\n4.2 V\n<\/td>\n<\/tr>\n\n<tr>\n<td style=\"padding:14px;border:1px solid #e3eaf2;font-weight:bold;color:#1565c0\">\nDischarge Cutoff Voltage\n<\/td>\n<td style=\"padding:14px;border:1px solid #e3eaf2\">\nTypically <strong>2.5 V to 3.0 V<\/strong>\n<\/td>\n<\/tr>\n\n<\/table>\n\n<div style=\"background:#eef7ff;border-top:1px solid #d6e4f0;padding:16px;font-size:15px;line-height:1.7\">\n<strong style=\"color:#1565c0\">\ud83d\udca1 Design Tip:<\/strong>\nThe MAX17048 is optimized for <strong>single-cell lithium-ion (Li-ion)<\/strong> and\n<strong>lithium-polymer (Li-Po)<\/strong> batteries. Using a battery within the recommended\nvoltage range ensures accurate State of Charge (SOC) estimation and reliable fuel gauge performance.\n<\/div>\n\n<\/div>\n\n<p style=\"text-align:center;font-style:italic;color:#666;margin-top:15px\">\n<strong>Table 3.<\/strong> Recommended battery specifications for the MAX17048 fuel gauge IC.\n<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Power Supply Requirements<\/h3>\n\n\n\n<p>The MAX17048 operates from a 2.5 V to 4.5 V supply voltage through the VDD pin. To ensure stable operation, use short PCB traces to minimize supply noise, place a 0.1 \u00b5F ceramic bypass capacitor between VDD and GND, and position the capacitor as close as possible to the IC. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">I\u00b2C Interface Requirements<\/h3>\n\n\n\n<p>The MAX17048 communicates with the host microcontroller using the standard I\u00b2C interface. Therefore, connect the SDA and SCL pins of the MAX17048 to the microcontroller I2C pins. I2C data lines are open-drain inputs; therefore, use external pull-up resistors on both I\u00b2C lines (typically <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/chip-resistor-surface-mount-yageo-rt0805fre074k7l-a2df4b8c\">4.7 k\u03a9<\/a> or <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/chip-resistor-surface-mount-te-connectivity-passive-product-crgp0805f10k-0e422f86\">10 k\u03a9<\/a>, depending on bus speed and capacitance. Keep I\u00b2C traces as short as practical and avoid routing I\u00b2C signals close to noisy switching power circuits. <\/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\/07\/MAX17048-schematics-.png\" alt=\"MAX17048 fuel Guage IC schematics with I2C interface\" \/><figcaption class=\"wp-element-caption\"><em>MAX17048 fuel Guage IC schematics with I2C interface<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Recommended External Components<\/h3>\n\n\n\n<p>The MAX17048 requires only a few external components, making it ideal for compact battery-powered applications.<\/p>\n\n\n\n<div style=\"margin:30px 0;border:1px solid #d6e4f0;border-radius:10px;overflow:hidden;font-family:Arial,Helvetica,sans-serif\">\n\n<div style=\"background:#1565c0;color:#ffffff;padding:15px;text-align:center\">\n<h3 style=\"margin:0;color:#ffffff\">\ud83d\udd27 Typical External Components<\/h3>\n<\/div>\n\n<table style=\"width:100%;border-collapse:collapse\">\n\n<thead>\n<tr style=\"background:#eaf3ff\">\n<th style=\"padding:14px;border:1px solid #d6e4f0\">Component<\/th>\n<th style=\"padding:14px;border:1px solid #d6e4f0\">Typical Value<\/th>\n<th style=\"padding:14px;border:1px solid #d6e4f0\">Purpose<\/th>\n<\/tr>\n<\/thead>\n\n<tbody>\n\n<tr style=\"background:#fcfdff\">\n<td style=\"padding:14px;border:1px solid #d6e4f0\">\n\ud83d\udd0b <strong>Decoupling Capacitor<\/strong>\n<\/td>\n<td style=\"padding:14px;border:1px solid #d6e4f0\">\n0.1 \u00b5F Ceramic\n<\/td>\n<td style=\"padding:14px;border:1px solid #d6e4f0;line-height:1.6\">\nStabilizes the <strong>VDD<\/strong> supply voltage and filters high-frequency noise.\n<\/td>\n<\/tr>\n\n<tr style=\"background:#f7fbff\">\n<td style=\"padding:14px;border:1px solid #d6e4f0\">\n\ud83d\udce1 <strong>I\u00b2C Pull-up Resistors<\/strong>\n<\/td>\n<td style=\"padding:14px;border:1px solid #d6e4f0\">\n4.7 k\u03a9 or 10 k\u03a9\n<\/td>\n<td style=\"padding:14px;border:1px solid #d6e4f0;line-height:1.6\">\nRequired on the <strong>SDA<\/strong> and <strong>SCL<\/strong> lines to ensure reliable I\u00b2C communication.\n<\/td>\n<\/tr>\n\n<tr style=\"background:#fcfdff\">\n<td style=\"padding:14px;border:1px solid #d6e4f0\">\n\ud83d\udd0b <strong>Li-ion \/ Li-Po Battery<\/strong>\n<\/td>\n<td style=\"padding:14px;border:1px solid #d6e4f0\">\nSingle Cell (3.7 V Nominal)\n<\/td>\n<td style=\"padding:14px;border:1px solid #d6e4f0;line-height:1.6\">\nPower source monitored by the MAX17048 fuel gauge for voltage and State of Charge (SOC) estimation.\n<\/td>\n<\/tr>\n\n<\/tbody>\n\n<\/table>\n\n<div style=\"background:#eef7ff;border-top:1px solid #d6e4f0;padding:16px;line-height:1.7\">\n\n<strong style=\"color:#1565c0\">\ud83d\udca1 Hardware Design Tip<\/strong><br><br>\n\nPlace the <strong>0.1 \u00b5F ceramic capacitor<\/strong> as close as possible to the <strong>VDD<\/strong> pin of the MAX17048. Likewise, position the <strong>I\u00b2C pull-up resistors<\/strong> close to the bus to improve signal integrity, especially on longer PCB traces.\n\n<\/div>\n\n<\/div>\n\n<p style=\"text-align:center;font-style:italic;color:#666;margin-top:15px\">\n<strong>Table 4.<\/strong> Typical external components required for a MAX17048 battery monitoring circuit.\n<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"typical_hardware_schematics_guideline_for_max17048\"><\/span>Typical Hardware Schematics Guideline for MAX17048<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A well-designed hardware schematic is essential for achieving accurate battery monitoring and reliable communication with the MAX17048. Although the IC requires only a few external components, following the recommended reference design and PCB layout practices ensures stable operation and precise State of Charge (SOC) estimation.<\/p>\n\n\n\n<p>A typical MAX17048 hardware design consists of a single-cell Li-ion or Li-Po battery, the MAX17048 fuel gauge IC, a <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/ceramic-capacitors-avx-corporation-0805dc104mat2a-2a9f9f49\">bypass capacitor of 0.1uF<\/a>, I\u00b2C pull-up resistors, and a host microcontroller. The IC continuously measures the battery voltage through the CELL pin and reports battery information such as voltage, State of Charge (SOC), and alert status over the I\u00b2C interface.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Typical Hardware Schematic<\/h3>\n\n\n\n<p>A basic MAX17048 application circuit includes the following connections:<\/p>\n\n\n\n<div style=\"margin:30px 0;border:1px solid #d6e4f0;border-radius:10px;overflow:hidden;font-family:Arial,Helvetica,sans-serif\">\n\n<div style=\"background:#1565c0;color:#ffffff;padding:15px;text-align:center\">\n<h3 style=\"margin:0;color:#ffffff\">\ud83d\udd0c Typical MAX17048 Hardware Connections<\/h3>\n<\/div>\n\n<table style=\"width:100%;border-collapse:collapse\">\n\n<thead>\n\n<tr style=\"background:#eaf3ff\">\n\n<th style=\"width:22%;padding:12px;border:1px solid #d6e4f0\">Component<\/th>\n\n<th style=\"width:43%;padding:12px;border:1px solid #d6e4f0\">Connection<\/th>\n\n<th style=\"width:35%;padding:12px;border:1px solid #d6e4f0\">Purpose<\/th>\n\n<\/tr>\n\n<\/thead>\n\n<tbody>\n\n<tr style=\"background:#fcfdff\">\n\n<td style=\"padding:12px;border:1px solid #d6e4f0\"><strong>\ud83d\udd0b Single-Cell Li-ion \/ Li-Po Battery<\/strong><\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nConnected to the CELL<\/strong> pin\n<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nProvides the battery voltage to be monitored.\n<\/td>\n\n<\/tr>\n\n<tr style=\"background:#f8fbff\">\n\n<td style=\"padding:12px;border:1px solid #d6e4f0\"><strong>\u26a1 VDD<\/strong><\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nConnected to the system power supply 2.5 V\u20134.5 V<\/strong>)\n<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nPowers the MAX17048 fuel gauge IC.\n<\/td>\n\n<\/tr>\n\n<tr style=\"background:#fcfdff\">\n\n<td style=\"padding:12px;border:1px solid #d6e4f0\"><strong>\ud83d\udfe1 0.1 \u00b5F Ceramic Capacitor<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nConnected between VDD and GND\n<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nFilters supply noise and stabilizes the power rail.\n<\/td>\n\n<\/tr>\n\n<tr style=\"background:#f8fbff\">\n\n<td style=\"padding:12px;border:1px solid #d6e4f0\"><strong>\ud83d\udce1 SDA<\/strong><\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nConnected to the microcontroller I\u00b2C data (SDA) pin through a pull-up resistor.\n<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nTransfers battery voltage, SOC, and configuration data.\n<\/td>\n\n<\/tr>\n\n<tr style=\"background:#fcfdff\">\n\n<td style=\"padding:12px;border:1px solid #d6e4f0\"><strong>\ud83d\udcf6 SCL<\/strong><\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nConnected to the microcontroller I\u00b2C clock (SCL) pin through a pull-up resistor.\n<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nSynchronizes I\u00b2C communication between the host MCU and MAX17048.\n<\/td>\n\n<\/tr>\n\n<tr style=\"background:#f8fbff\">\n\n<td style=\"padding:12px;border:1px solid #d6e4f0\"><strong>\ud83d\udea8 ALRT<\/strong><\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nConnected to a GPIO interrupt pin <em>(optional)<\/em>.\n<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nGenerates low-battery and programmable alert notifications.\n<\/td>\n\n<\/tr>\n\n<tr style=\"background:#fcfdff\">\n\n&lt;td style=&quot;padding:12px; border:1px solid #d6e4f0;&quot;\u23da GND<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nConnected to the common ground plane.\n<\/td>\n\n<td style=\"padding:12px;border:1px solid #d6e4f0;line-height:1.6\">\nProvides the electrical reference for the entire circuit.\n<\/td>\n\n<\/tr>\n\n<\/tbody>\n\n<\/table>\n\n\n<\/div>\n\n<p style=\"text-align:center;font-style:italic;color:#666;margin-top:15px\">\n<strong>Table 5.<\/strong> Typical hardware connections for implementing the MAX17048 fuel gauge in a battery-powered embedded system.\n<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"smart_watch_design_real-world_design_example\"><\/span>Smart Watch Design: Real-World Design Example <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>To demonstrate how the MAX17048 battery fuel gauge is integrated into a commercial embedded system, this section presents a real-world smartwatch hardware design. Unlike simplified reference circuits, this design combines battery charging, protection, power management, wireless communication, sensing, memory, and display interfaces into a compact wearable PCB.<\/p>\n\n\n\n<p>The smartwatch is powered by a single-cell Li-Po battery, which serves as the primary energy source for the entire system. The battery is monitored by the MAX17048 fuel gauge IC, allowing the microcontroller to accurately determine the battery&#8217;s State of Charge (SOC), display the remaining battery percentage to the user, and implement intelligent power management strategies. The system-level block diagram of the smartwatch design is shown below, and then each section along with its schematic design is explained. <\/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\/07\/System-level-block-diagram-of-Smart-Watch-Design.png\" alt=\"System level block diagram of Smart Watch Design\" \/><figcaption class=\"wp-element-caption\"><em>System-level block diagram of Smart Watch Design<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p>The following sections explain the purpose of each major hardware block used in the smartwatch design.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Li-Po Battery<\/h3>\n\n\n\n<p>The smartwatch uses a single-cell Lithium-Polymer (Li-Po) battery, which provides a lightweight, high-energy-density power source suitable for wearable electronics. The battery supplies power to all system components and is continuously monitored by the MAX17048 to provide accurate battery status information.<\/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\/07\/LIPO-battery-connection-for-smart-watch.png\" alt=\"Lipo battery connection using a 2 pin connector\" \/><figcaption class=\"wp-element-caption\"><em>Lipo battery connection using a 2 pin connector<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Battery Protection Circuit (DW01A)<\/h3>\n\n\n\n<p>The DW01A Battery Protection IC protects the Li-Po battery against abnormal operating conditions such as overcharging, over-discharging, overcurrent, and short circuits. Working together with the external MOSFET <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/transistors-fets-mosfets-single-alpha-omega-semiconductor-inc-ao3400a-101-3b2fd08e\">AO3400<\/a>, it disconnects the battery whenever unsafe conditions are detected, significantly improving battery safety and extending 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\/07\/battery-protection-circuit.png\" alt=\"Battery Protection Circuit integrated in the smart watch design\" \/><figcaption class=\"wp-element-caption\"><em>Battery Protection Circuit integrated in the smart watch design<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">USB Type-C Power Input<\/h3>\n\n\n\n<p>A USB Type-C connector is used in smartwatch design, which provides the external power source for charging the smartwatch battery. It allows users to recharge the device using standard USB chargers while also serving as the interface between the charging circuit and the external power supply.<\/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\/07\/USB-for-smart-watch.png\" alt=\"USB TYPE C circuit design for smart watch battery charging\" \/><figcaption class=\"wp-element-caption\"><em>USB TYPE C circuit design for smart watch battery charging<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Li-Ion Battery Charging Circuit (BQ25100)<\/h3>\n\n\n\n<p>The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/pmic-battery-chargers-texas-instruments-bq25100byfpr-fd496ab4\">BQ25100BYFPR is a highly integrated single-cell Li-Ion\/Li-Po battery charging IC <\/a>designed for compact portable devices. It manages the complete charging process, including pre-charge, constant-current charging, constant-voltage charging, and charge termination. Its integrated charging algorithm ensures safe, efficient, and reliable battery charging while minimizing the number of required external components.<\/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\/07\/Lion-Battery-charger-IC.png\" alt=\"Li-on Battery Charging IC BQ25100BYFPR\" \/><figcaption class=\"wp-element-caption\"><em>Li-on Battery Charging IC BQ25100BYFPR<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Battery Fuel Gauge (MAX17048)<\/h3>\n\n\n\n<p>The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/pmic-battery-management-maxim-integrated-max17048g-t10-7f22da60\">MAX17048G+T10<\/a> continuously measures the battery voltage and estimates the remaining battery capacity using Maxim&#8217;s proprietary ModelGauge\u2122 algorithm. Unlike conventional fuel gauges, it does not require a current-sense resistor, reducing PCB space and overall system cost.<\/p>\n\n\n\n<p>The fuel gauge communicates with the main processor through the I\u00b2C interface, allowing the smartwatch to display an accurate battery percentage, estimate remaining operating time, and generate low-battery alerts when necessary.<\/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\/07\/Fuel-Guage-IC-for-smart-watch-.png\" alt=\"Fuel Guage IC MAX17048 for Battery charge monitoring for smart watch\" \/><figcaption class=\"wp-element-caption\"><em>Fuel Guage IC MAX17048 for Battery charge monitoring for smart watch<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.flywing-tech.com\/product-detail\/pmic-battery-management-maxim-integrated-max17048g-t10-7f22da60\" 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\/07\/max17048gt10.png\" alt=\"Analog Devices MAX17048G+T10 lithium-ion battery monitor IC \u2013 1-cell fuel gauge 8-TDFN specifications and technical support at Flywing\" class=\"wp-image-9688\" \/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Power Management and Voltage Regulation<\/h3>\n\n\n\n<p>The smartwatch uses dedicated voltage regulators to provide stable supply voltages for different subsystems.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">XC6206P182MR for 1.8V Regulation<\/h4>\n\n\n\n<p>The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/pmic-voltage-regulators-linear-torex-semiconductor-ltd-xc6206p182mr-g-4298b8a7\">XC6206P182MR<\/a> is a low-dropout (LDO) voltage regulator that generates a stable low-voltage rail for sensitive low-power circuitry like <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/specialized-ics-maxim-integrated-maxm86161efd-9abc5234\">MAXM86161 <\/a>to monitor heart rate, pulse rate, and blood oxygen saturation (SpO\u2082). Its low quiescent current makes it well suited for battery-powered wearable devices.<\/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\/07\/1V8-regulator-using-XC620P18.png\" alt=\"1V8 regulator using XC620P18\" \/><figcaption class=\"wp-element-caption\"><em>1V8 regulator using XC620P18<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\">RT9080-33GJ5 for 3V3 Regulation<\/h4>\n\n\n\n<p>The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/pmic-voltage-regulators-linear-richtek-usa-inc-rt9080-33gj5-9bada87c\">RT9080-33GJ5<\/a> provides a regulated 3.3 V supply for digital components such as the microcontroller, external memory, sensors, and communication interfaces. Stable voltage regulation is essential for reliable operation and reduced system noise.<\/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\/07\/Step-down-converter-RT9080.png\" alt=\"3V3 voltage regulation for smart watch using RT9080\" \/><figcaption class=\"wp-element-caption\"><em>3V3 voltage regulation for smart watch using RT9080<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">nRF52840 As the Main Microcontroller<\/h3>\n\n\n\n<p>The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/rf-transceiver-ics-nordic-semiconductor-asa-nrf52840-qiaa-r7-257bc673\">nRF52840-QIAA-R <\/a>serves as the primary processing unit of the smartwatch. It integrates a powerful ARM Cortex-M4 processor with Bluetooth Low Energy (BLE) connectivity, enabling wireless communication with smartphones and other Bluetooth-enabled devices.<\/p>\n\n\n\n<p>The microcontroller collects sensor data, controls the display, manages battery information received from the MAX17048, stores application data, and coordinates the overall operation of the smartwatch.<\/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\/07\/Microcontroller-NRF52840.png\" alt=\"nRF52840 schematic for Smart watch design\" \/><figcaption class=\"wp-element-caption\"><em>nRF52840 schematic for Smart watch design<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">External Flash Memory using P25Q16SH-SSH-IR<\/h3>\n\n\n\n<p>The P25Q16SH-SSH-IR serial flash memory provides non-volatile storage for firmware, application data, fonts, graphical assets, configuration parameters, and firmware updates. Additional external memory allows more flexibility than relying solely on the microcontroller&#8217;s internal flash.<\/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\/07\/2MB-Flash-P25Q16SH.png\" alt=\"2MB Flash P25Q16SH IC for smart watch design\" \/><figcaption class=\"wp-element-caption\"><em>2MB Flash P25Q16SH IC for smart watch design<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Optical Heart Rate and Pulse Oximeter Sensor<\/h3>\n\n\n\n<p>The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/specialized-sensors-maxim-integrated-maxm86161efd-t-38daa031\">MAXM86161EFD+T is an integrated optical biosensing module<\/a> capable of measuring heart rate, pulse rate, and blood oxygen saturation (SpO\u2082). It combines LEDs, photodetectors, and analog front-end circuitry in a compact package, making it highly suitable for wearable health-monitoring applications.<\/p>\n\n\n\n<p>The sensor communicates with the microcontroller using the I\u00b2C interface, allowing continuous health monitoring while maintaining low power consumption.<\/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\/07\/Optical-data-accquistion-using-MAXM86161.png\" alt=\"Optical data accquistion using MAXM86161\" \/><figcaption class=\"wp-element-caption\"><em>Optical data accquistion using MAXM86161<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Motion Sensor (BMA400)<\/h3>\n\n\n\n<p>The<a href=\"https:\/\/www.flywing-tech.com\/product-detail\/motion-sensors-accelerometers-bosch-sensortec-bma400-b9658246\"> BMA400 is an ultra-low-power three-axis accelerometer used to detect movement,<\/a> orientation, step counting, activity recognition, and motion events. Its extremely low current consumption makes it ideal for always-on wearable devices that require long battery life.<\/p>\n\n\n\n<p>Motion data collected from the BMA400 enables smartwatch features such as fitness tracking, gesture detection, sleep monitoring, and automatic display wake-up.<\/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\/07\/Accelorometer-BM.png\" alt=\"Three axis accelerometer for motion sensing for smart watch design\" \/><figcaption class=\"wp-element-caption\"><em>Three-axis accelerometer for motion sensing of a smart watch design<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Bluetooth RF Matching Network and Antenna<\/h3>\n\n\n\n<p>The <a href=\"https:\/\/www.flywing-tech.com\/product-detail\/rf-antennas-walsin-technology-corporation-rfeca3216060a1t-4b4da376\">RFECA3216060A1T<\/a> RF front-end component forms part of the Bluetooth antenna matching network. It optimizes impedance matching between the nRF52840 RF output and the antenna, helping maximize wireless communication range while reducing signal reflections and improving RF efficiency.<\/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\/07\/Bluetooth-RF-Matching-Network-and-Antenna.png\" alt=\"Bluetooth RF Matching Network and Antenna using RFECA3216060A1T\" \/><figcaption class=\"wp-element-caption\"><em>Bluetooth RF Matching Network and Antenna using RFECA3216060A1T<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">E-Paper Display Interface<\/h3>\n\n\n\n<p>The smartwatch uses a 1.02-inch E-Paper display, which connects to the PCB through a Flexible Printed Circuit (FPC) connector. E-paper displays consume extremely low power because they only require energy when updating the displayed image, making them ideal for battery-powered wearable products.<\/p>\n\n\n\n<p>The microcontroller nRF52840 communicates with the display controller to update graphics, menus, icons, and battery status information.<\/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\/07\/1.02-INCH-E-apper-display-connector-.png\" alt=\"1.02 INCH E-Paper display FPC connector for smat watch display screen\" \/><figcaption class=\"wp-element-caption\"><em>1.02 INCH E-Paper display FPC connector for smat watch display screen<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p>The PCB design layout and PCB 3D view of smart watch just discussed in this section 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\/07\/Smart-watch-layout-design.png\" alt=\"Smart Watch PCB Design Layout\" \/><figcaption class=\"wp-element-caption\"><em>Smart Watch PCB Design Layout<\/em><\/figcaption><\/figure>\n<\/div>\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\/07\/smart-watch-3D-PCB-design-.png\" alt=\"Smart Watch PCB 3D Design View\" \/><figcaption class=\"wp-element-caption\"><em>Smart Watch PCB 3D Design View<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"pcb_layout_guidelines_for_max17048\"><\/span>PCB Layout Guidelines for MAX17048<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A well-designed PCB layout is essential for obtaining accurate battery voltage measurements and reliable communication when using the MAX17048 fuel gauge IC. Although the MAX17048 requires only a few external components, poor PCB layout can introduce electrical noise, voltage measurement errors, and communication issues that reduce the accuracy of the State of Charge (SOC) calculation. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Place the MAX17048 Close to the Battery Connector<\/h3>\n\n\n\n<p>The CELL pin measures the battery voltage directly, making it the most sensitive signal in the circuit. To minimize voltage drops and noise pickup, the MAX17048 should be placed as close as possible to the battery connector.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Place the Decoupling Capacitor Close to VDD<\/h3>\n\n\n\n<p>The 0.1 \u00b5F ceramic bypass capacitor should be placed immediately next to the VDD pin. A short connection between the capacitor, VDD, and GND minimizes supply noise and improves the stability of the internal analog circuitry.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use a Solid Ground Plane<\/h3>\n\n\n\n<p>A continuous ground plane provides a low-impedance return path and helps reduce electrical noise throughout the circuit. Therefore, when using a MAX17048 for a wearable electronic and medical-related product, it is recommended to use a dedicated Ground plane. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"real-world_applications_of_max17048\"><\/span>Real-World Applications of MAX17048<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The MAX17048 is a highly efficient battery fuel gauge IC used in a wide range of battery-powered electronic devices, from smartwatches and IoT sensors to portable medical equipment and consumer electronics. Designed specifically for single-cell Lithium-Ion (Li-ion) and Lithium-Polymer (Li-Po) batteries, it provides accurate battery voltage monitoring and reliable State of Charge (SOC) estimation while consuming very little power.<\/p>\n\n\n\n<p>Its compact size, low-power operation, and easy I\u00b2C interface make it an ideal choice for modern portable and embedded systems where accurate battery management is essential. Some of the widely used applications where the MAX17048 are used are; <\/p>\n\n\n\n<h3 style=\"text-align:center;color:#1565c0;font-family:Arial,sans-serif;margin-bottom:25px\">\nReal-World Applications of MAX17048\n<\/h3>\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:15px;font-family:Arial,sans-serif\">\n\n<tr>\n\n<td style=\"width:50%;vertical-align:top;background:#f8fbff;border:1px solid #dbe8f7;border-left:6px solid #1565c0;border-radius:10px;padding:18px\">\n<h3 style=\"margin-top:0;color:#1565c0\">\u231a Smartwatches &amp; Wearables<\/h3>\n<p style=\"margin-bottom:0;line-height:1.7;color:#444\">\nUsed for accurate battery percentage monitoring in smartwatches, fitness bands, health trackers, and other wearable devices powered by single-cell Li-Po batteries.\n<\/p>\n<\/td>\n\n<td style=\"width:50%;vertical-align:top;background:#f8fff9;border:1px solid #dbe8f7;border-left:6px solid #28a745;border-radius:10px;padding:18px\">\n<h3 style=\"margin-top:0;color:#28a745\">\ud83c\udf10 IoT Devices<\/h3>\n<p style=\"margin-bottom:0;line-height:1.7;color:#444\">\nProvides battery monitoring for wireless sensor nodes, smart agriculture systems, asset trackers, environmental monitoring devices, and remote IoT applications.\n<\/p>\n<\/td>\n\n<\/tr>\n\n<tr>\n\n<td style=\"vertical-align:top;background:#fffaf9;border:1px solid #dbe8f7;border-left:6px solid #dc3545;border-radius:10px;padding:18px\">\n<h3 style=\"margin-top:0;color:#dc3545\">\ud83c\udfe5 Portable Medical Devices<\/h3>\n<p style=\"margin-bottom:0;line-height:1.7;color:#444\">\nIntegrated into portable ECG monitors, pulse oximeters, glucose meters, wearable health trackers, and patient monitoring systems where reliable battery information is critical.\n<\/p>\n<\/td>\n\n<td style=\"vertical-align:top;background:#fffdf8;border:1px solid #dbe8f7;border-left:6px solid #ff9800;border-radius:10px;padding:18px\">\n<h3 style=\"margin-top:0;color:#ff9800\">\ud83c\udfa7 Consumer Electronics<\/h3>\n<p style=\"margin-bottom:0;line-height:1.7;color:#444\">\nCommonly used in Bluetooth speakers, wireless headphones, handheld gaming devices, GPS receivers, barcode scanners, and many other portable consumer products.\n<\/p>\n<\/td>\n\n<\/tr>\n\n<tr>\n\n<td style=\"vertical-align:top;background:#fcf8ff;border:1px solid #dbe8f7;border-left:6px solid #9c27b0;border-radius:10px;padding:18px\">\n<h3 style=\"margin-top:0;color:#9c27b0\">\ud83d\udce1 Wireless Communication Devices<\/h3>\n<p style=\"margin-bottom:0;line-height:1.7;color:#444\">\nSupports intelligent battery management in Bluetooth Low Energy (BLE), Zigbee, Thread, Wi-Fi, and other battery-powered wireless communication modules.\n<\/p>\n<\/td>\n\n<td style=\"vertical-align:top;background:#fdfbf9;border:1px solid #dbe8f7;border-left:6px solid #795548;border-radius:10px;padding:18px\">\n<h3 style=\"margin-top:0;color:#795548\">\ud83c\udfed Industrial Equipment<\/h3>\n<p style=\"margin-bottom:0;line-height:1.7;color:#444\">\nUsed in portable industrial terminals, handheld testing instruments, maintenance tools, field data collection devices, and battery-powered industrial controllers.\n<\/p>\n<\/td>\n\n<\/tr>\n\n<tr>\n\n<td style=\"vertical-align:top;background:#f8fffd;border:1px solid #dbe8f7;border-left:6px solid #20c997;border-radius:10px;padding:18px\">\n<h3 style=\"margin-top:0;color:#20c997\">\ud83c\udfe0 Smart Home Products<\/h3>\n<p style=\"margin-bottom:0;line-height:1.7;color:#444\">\nIntegrated into smart locks, wireless alarm systems, smart doorbells, home automation sensors, and battery-powered security devices.\n<\/p>\n<\/td>\n\n<td style=\"vertical-align:top;background:#f8faff;border:1px solid #dbe8f7;border-left:6px solid #3f51b5;border-radius:10px;padding:18px\">\n<h3 style=\"margin-top:0;color:#3f51b5\">\ud83d\udcbb Embedded Systems &amp; Development Boards<\/h3>\n<p style=\"margin-bottom:0;line-height:1.7;color:#444\">\nIdeal for embedded prototypes, evaluation boards, educational electronics projects, and custom battery-powered hardware requiring accurate fuel gauging.\n<\/p>\n<\/td>\n\n<\/tr>\n\n<\/table>\n\n<\/div>\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 MAX17048 is a compact and highly accurate battery fuel gauge IC designed for single-cell Li-ion and Li-Po battery-powered devices. Its algorithm eliminates the need for an external current-sense resistor while delivering reliable State of Charge (SOC) estimation, making it an ideal choice for portable and embedded systems.<\/p>\n\n\n\n<p>In this guide, we covered the MAX17048&#8217;s working principle, pinout, hardware design requirements, reference schematic, PCB layout guidelines, and a real-world smartwatch design example. By following these design recommendations and best practices, engineers can develop reliable battery monitoring circuits that improve power management, extend battery life, and enhance the performance of modern battery-powered electronic devices.<\/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-1783171165549\"><strong class=\"schema-faq-question\">Can the MAX17048 be used with any rechargeable battery?<\/strong> <p class=\"schema-faq-answer\">No. The MAX17048 is designed specifically for single-cell Li-ion and Li-Po batteries. It is not suitable for multi-cell battery packs or battery chemistries such as NiMH or lead-acid without additional circuitry.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1783171191694\"><strong class=\"schema-faq-question\">What is the operating voltage range of the MAX17048?<\/strong> <p class=\"schema-faq-answer\">The MAX17048 operates from a supply voltage of 2.5 V to 4.5 V, making it compatible with most single-cell battery-powered applications.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1783171212324\"><strong class=\"schema-faq-question\">Why is my battery percentage inaccurate when using the MAX17048?<\/strong> <p class=\"schema-faq-answer\">Incorrect battery readings are often caused by PCB layout issues, electrical noise on the CELL pin, poor grounding, inadequate power supply decoupling, or incorrect I\u00b2C communication.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1783171246679\"><strong class=\"schema-faq-question\">How do I connect the MAX17048 to a microcontroller?<\/strong> <p class=\"schema-faq-answer\">The MAX17048 communicates using the standard I\u00b2C interface. Connect the SDA and SCL pins to the microcontroller&#8217;s I\u00b2C bus, add suitable pull-up resistors, connect the CELL pin to the battery positive terminal, and connect VDD and GND according to the recommended hardware schematic.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1783171271718\"><strong class=\"schema-faq-question\">What pull-up resistor values should I use for the I\u00b2C bus?<\/strong> <p class=\"schema-faq-answer\">For most applications, 4.7 k\u03a9 pull-up resistors are recommended for the SDA and SCL lines. Depending on the bus speed, supply voltage, and total bus capacitance, 10 k\u03a9 pull-up resistors may also be suitable.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1783171296193\"><strong class=\"schema-faq-question\">Can the MAX17048 be used in wearable devices such as smartwatches?<\/strong> <p class=\"schema-faq-answer\">Yes. The MAX17048 is widely used in smartwatches, fitness trackers, and other wearable electronics because of its compact package, ultra-low power consumption, and accurate battery fuel gauging.<\/p> <\/div> <\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.flywing-tech.com\/category\/integrated-circuits-ics\/pmic-battery-management-375e3253\" 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\/07\/battery-management-ics-for-power-monitoring.png\" alt=\"battery management ICs used for battery monitoring, protection, cell balancing, and power management in portable and industrial electronic systems.\" class=\"wp-image-9689\" \/><\/a><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction Modern portable electronic devices have become increasingly dependent on rechargeable lithium-ion (Li-ion) and lithium-polymer (Li-Po) batteries. From wearable electronics and wireless sensors to industrial handheld equipment and medical devices, battery-powered products are expected to operate longer, charge faster, and provide users with accurate information about the remaining battery capacity. However, simply measuring the battery [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":9687,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1334,377,1489,380,1490],"tags":[1500,1491,1503,1494,1502,1493,1501,1492,1499,1496,1498,1495,1497],"class_list":["post-9574","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-battery-management-systems-bms","category-experience-sharing","category-power-electronics-experience-sharing","category-technical-tutorial","category-wearable-devices","tag-analog-devices-max17048","tag-battery-fuel-gauge","tag-embedded-systems-tutorial","tag-i2c-fuel-gauge","tag-iot-battery-management","tag-li-ion-battery-monitoring","tag-lithium-polymer-battery-gauge","tag-max17048","tag-max17048-pinout","tag-pcb-layout-guidelines","tag-portable-device-power-management","tag-smart-watch-hardware-design","tag-soc-estimation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>How to Design Smart Battery Monitoring Systems Using MAX17048 - Fly-Wing<\/title>\r\n<meta name=\"description\" content=\"Learn how to design a smart battery monitoring system using MAX17048. 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Connect the SDA and SCL pins to the microcontroller's I\u00b2C bus, add suitable pull-up resistors, connect the CELL pin to the battery positive terminal, and connect VDD and GND according to the recommended hardware schematic.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.flywing-tech.com\/blog\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#faq-question-1783171271718","position":5,"url":"https:\/\/www.flywing-tech.com\/blog\/how-to-design-smart-battery-monitoring-systems-using-max17048\/#faq-question-1783171271718","name":"What pull-up resistor values should I use for the I\u00b2C bus?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"For most applications, 4.7 k\u03a9 pull-up resistors are recommended for the SDA and SCL lines. 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