{"id":556,"date":"2025-04-25T21:01:36","date_gmt":"2025-04-25T13:01:36","guid":{"rendered":"https:\/\/www.flywing-tech.com\/blog\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/"},"modified":"2025-06-22T21:45:48","modified_gmt":"2025-06-22T13:45:48","slug":"using-programmable-logic-devices-for-systematic-power-up-sequencing","status":"publish","type":"post","link":"https:\/\/www.flywing-tech.com\/blog\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/","title":{"rendered":"How Programmable Logic Devices Enhance Systematic Power-Up Sequencing"},"content":{"rendered":"<div class=\"fsc_text\"><p class=\"\" data-start=\"130\" data-end=\"287\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Programmable Logic Devices (PLDs) are revolutionizing power-up sequencing in electronic systems.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">By integrating multiple discrete components into a single chip, PLDs simplify designs, reduce costs, and enhance reliability.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">This article explores the role of PLDs in power-up sequencing, their advantages over traditional methods, and best practices for implementation.<\/span>\u200b<\/p>\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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/#what_is_power-up_sequencing_and_why_is_it_crucial\" >What Is Power-Up Sequencing and Why Is It Crucial?<\/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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/#how_do_programmable_logic_devices_facilitate_power-up_sequencing\" >How Do Programmable Logic Devices Facilitate Power-Up Sequencing?<\/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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/#what_are_the_advantages_of_using_plds_in_power-up_sequencing\" >What Are the Advantages of Using PLDs in Power-Up Sequencing?<\/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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/#which_applications_benefit_most_from_pld-based_power-up_sequencing\" >Which Applications Benefit Most from PLD-Based Power-Up Sequencing?<\/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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/#how_can_engineers_implement_pld-based_power-up_sequencing\" >How Can Engineers Implement PLD-Based Power-Up Sequencing?<\/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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/#buying_tips\" >Buying Tips<\/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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/#electronic_components_expert_views\" >Electronic Components Expert Views<\/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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/#faq\" >FAQ<\/a><\/li><\/ul><\/nav><\/div>\r\n<h2 class=\"\" data-start=\"289\" data-end=\"342\"><span class=\"ez-toc-section\" id=\"what_is_power-up_sequencing_and_why_is_it_crucial\"><\/span>What Is Power-Up Sequencing and Why Is It Crucial?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"344\" data-end=\"539\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Power-up sequencing ensures that electronic components receive power in a specific order, preventing damage and ensuring proper functionality.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Incorrect sequencing can lead to latch-up conditions, bus contention, or even permanent damage to sensitive components.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">For instance, microcontrollers, FPGAs, DSPs, ADCs, and other devices often operate from multiple voltage rails, requiring precise sequencing to avoid immediate or long-term damage.<\/span> \u200b<\/p>\n<h2 class=\"\" data-start=\"541\" data-end=\"609\"><span class=\"ez-toc-section\" id=\"how_do_programmable_logic_devices_facilitate_power-up_sequencing\"><\/span>How Do Programmable Logic Devices Facilitate Power-Up Sequencing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"611\" data-end=\"816\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">PLDs, such as the TPLD1201 from Texas Instruments, offer configurable logic and timing blocks that can generate symmetric power-up and power-down signals.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">These devices replace multiple discrete components, streamlining the design process and reducing the overall footprint.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">The TPLD1201, for example, allows for feedback mechanisms to verify the sequence, enhancing reliability.<\/span> \u200b<\/p>\n<h2 class=\"\" data-start=\"818\" data-end=\"882\"><span class=\"ez-toc-section\" id=\"what_are_the_advantages_of_using_plds_in_power-up_sequencing\"><\/span>What Are the Advantages of Using PLDs in Power-Up Sequencing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"884\" data-end=\"1168\">\n<li class=\"\" data-start=\"884\" data-end=\"942\">\n<p class=\"\" data-start=\"886\" data-end=\"942\"><strong data-start=\"886\" data-end=\"901\">Integration<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Combines multiple functions into a single chip, saving PCB space and reducing component count.<\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"943\" data-end=\"1001\">\n<p class=\"\" data-start=\"945\" data-end=\"1001\"><strong data-start=\"945\" data-end=\"960\">Flexibility<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Easily reconfigurable to accommodate different sequencing requirements.<\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"1002\" data-end=\"1060\">\n<p class=\"\" data-start=\"1004\" data-end=\"1060\"><strong data-start=\"1004\" data-end=\"1019\">Reliability<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Reduces the risk of human error associated with discrete component assembly.<\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"1061\" data-end=\"1168\">\n<p class=\"\" data-start=\"1063\" data-end=\"1168\"><strong data-start=\"1063\" data-end=\"1081\">Cost-Effective<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Lower overall system costs due to reduced component and assembly needs.<\/span>\u200b<\/p>\n<\/li>\n<\/ul>\n<h2 class=\"\" data-start=\"1170\" data-end=\"1240\"><span class=\"ez-toc-section\" id=\"which_applications_benefit_most_from_pld-based_power-up_sequencing\"><\/span>Which Applications Benefit Most from PLD-Based Power-Up Sequencing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"1242\" data-end=\"1407\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Applications requiring multiple voltage rails, such as adaptive SoCs, benefit significantly from PLD-based sequencing.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">For example, AMD&#8217;s adaptive SoCs necessitate that the POR_B input be asserted low during the power-on sequence and remain low for a minimum duration after all required supplies have reached their final voltages.<\/span> \u200b<\/p>\n<h2 class=\"\" data-start=\"1409\" data-end=\"1470\"><span class=\"ez-toc-section\" id=\"how_can_engineers_implement_pld-based_power-up_sequencing\"><\/span>How Can Engineers Implement PLD-Based Power-Up Sequencing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"1472\" data-end=\"1557\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Engineers can implement PLD-based sequencing by:<\/span>\u200b<\/p>\n<ol data-start=\"1559\" data-end=\"1897\">\n<li class=\"\" data-start=\"1559\" data-end=\"1635\">\n<p class=\"\" data-start=\"1562\" data-end=\"1635\"><strong data-start=\"1562\" data-end=\"1594\">Selecting an Appropriate PLD<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Choose a PLD with sufficient I\/O pins and configurable logic blocks to meet sequencing requirements.<\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"1636\" data-end=\"1712\">\n<p class=\"\" data-start=\"1639\" data-end=\"1712\"><strong data-start=\"1639\" data-end=\"1671\">Designing the Sequence Logic<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Utilize PLD development tools to design the power-up and power-down sequences.<\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"1713\" data-end=\"1780\">\n<p class=\"\" data-start=\"1716\" data-end=\"1780\"><strong data-start=\"1716\" data-end=\"1739\">Programming the PLD<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Load the designed logic into the PLD using the manufacturer&#8217;s programming tools.<\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"1781\" data-end=\"1897\">\n<p class=\"\" data-start=\"1784\" data-end=\"1897\"><strong data-start=\"1784\" data-end=\"1810\">Testing and Validation<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Thoroughly test the implemented sequence to ensure reliability under various operating conditions.<\/span>\u200b<\/p>\n<\/li>\n<\/ol>\n<h2 class=\"\" data-start=\"1899\" data-end=\"1913\"><span class=\"ez-toc-section\" id=\"buying_tips\"><\/span>Buying Tips<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"1915\" data-end=\"1959\">When selecting PLDs for power-up sequencing:<\/p>\n<ul data-start=\"1961\" data-end=\"2196\">\n<li class=\"\" data-start=\"1961\" data-end=\"2027\">\n<p class=\"\" data-start=\"1963\" data-end=\"2027\"><strong data-start=\"1963\" data-end=\"1986\">Assess Requirements<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Determine the number of voltage rails and sequencing complexity.<\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"2028\" data-end=\"2089\">\n<p class=\"\" data-start=\"2030\" data-end=\"2089\"><strong data-start=\"2030\" data-end=\"2048\">Evaluate Tools<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Consider the availability and ease of use of development and programming tools.<\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"2090\" data-end=\"2196\">\n<p class=\"\" data-start=\"2092\" data-end=\"2196\"><strong data-start=\"2092\" data-end=\"2109\">Check Support<\/strong>: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Ensure the manufacturer offers adequate technical support and documentation.<\/span>\u200b<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"2198\" data-end=\"2403\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Fly-Wing Technology (HK) Co., Limited has been consistently dedicated to assisting customers in finding hard-to-find parts quickly and accurately, as well as acquiring new and original parts at competitive prices since 2012.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Their website offers consistently competitive prices that are in line with or lower than those of other leading online distributors or superstores.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">With warehouses in Hong Kong, they can purchase electronic components from all over the world, offering powerful competitive prices.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">They acknowledge the difficulty of sourcing obsolete electronic components and strive to provide the best solutions for their customers.<\/span>\u200b<\/p>\n<h2 class=\"\" data-start=\"2405\" data-end=\"2442\"><span class=\"ez-toc-section\" id=\"electronic_components_expert_views\"><\/span>Electronic Components Expert Views<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"2444\" data-end=\"2577\">&#8220;\u200b<span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Integrating power-up sequencing into a PLD not only streamlines the design but also enhances system reliability by reducing the potential for human error and component mismatch.<\/span>&#8221; \u2014 <em data-start=\"2495\" data-end=\"2531\">Senior Engineer, Texas Instruments<\/em>\u200b<\/p>\n<h2 class=\"\" data-start=\"2579\" data-end=\"2585\"><span class=\"ez-toc-section\" id=\"faq\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"2587\" data-end=\"2622\"><strong data-start=\"2587\" data-end=\"2622\">Q: What is power-up sequencing?<\/strong><\/p>\n<p class=\"\" data-start=\"2624\" data-end=\"2712\">A: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Power-up sequencing is the controlled application of power to different components in a specific order to prevent damage and ensure proper operation.<\/span>\u200b<\/p>\n<p class=\"\" data-start=\"2714\" data-end=\"2762\"><strong data-start=\"2714\" data-end=\"2762\">Q: Why are PLDs used in power-up sequencing?<\/strong><\/p>\n<p class=\"\" data-start=\"2764\" data-end=\"2852\">A: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">PLDs integrate multiple discrete components into a single chip, offering flexibility, reliability, and cost savings in power-up sequencing applications.<\/span>\u200b<\/p>\n<p class=\"\" data-start=\"2854\" data-end=\"2909\"><strong data-start=\"2854\" data-end=\"2909\">Q: Can PLDs handle complex sequencing requirements?<\/strong><\/p>\n<p class=\"\" data-start=\"2911\" data-end=\"2999\">A: <span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Yes, PLDs can be programmed to handle complex sequencing requirements, making them suitable for applications with multiple voltage rails and timing constraints.<\/span>\u200b<\/p>\n<p><strong><span style=\"color: #000000; background-color: #ffffff; font-size: 22px;\">Discover how single-chip programmable logic devices (PLDs) can replace multiple discrete components in power-up sequencing circuits, reducing costs and saving PCB space.<\/span><\/strong><\/p>\n<p style=\"text-align: start;\">Many of today&#8217;s electronic products, whether simple or sophisticated, require systematic power-up sequences to enable functions in the correct order and timing. Incorrect sequencing can lead to anything from minor user inconvenience to catastrophic product failure.<\/p>\n<p style=\"text-align: start;\">Traditionally, power sequencing in electronics involves multiple discrete logic devices and passive components. However, single-chip programmable logic devices (PLDs) now integrate all necessary discrete components. This article will explore various power-rail sequences and timing using multiple inputs and outputs.<\/p>\n<p style=\"text-align: start;\"><strong>The Limitations of Using Discrete Solutions<\/strong><\/p>\n<p style=\"text-align: start;\">Let&#8217;s start by examining Figure 1, which illustrates a power-sequencing example based on a single-battery input.<\/p>\n<p style=\"text-align: start;\">This example will demonstrate how PLDs can simplify your designs while offering greater flexibility compared to discrete logic solutions. If the battery voltage is acceptable, the device will follow the sequence according to the timing shown in the figure.<\/p>\n<p style=\"text-align: start;\"><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/202411270953265326cda7fc65a43dc0b7bc11680b5436a9d66cf2c.png\" alt=\"\" data-href=\"\" \/><\/p>\n<p style=\"text-align: center;\"><em><strong>Figure 1. Power-sequencing example based on single-battery input. [click to enlarge]<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000; background-color: #ffffff;\">Figure 2 is the circuit schematic for a discrete logic design that would generate the signals of Figure 1.<\/span><\/p>\n<p><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/20241127095400540a7667a059560c7d120a0ec511706ac32ea364.png\" alt=\"\" data-href=\"\" \/><\/p>\n<p style=\"text-align: center;\"><em><strong>Figure 2. Analog and discrete logic power-sequencing schematic. [click to enlarge]<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: start;\">As you can see, supporting power sequencing through analog and discrete logic is straightforward. However, this approach is not optimal in terms of the number of devices and the required printed circuit board area.<\/p>\n<p style=\"text-align: start;\">Inevitably, the discrete approach will result in higher development and final product costs compared to a PLD-based design. Additionally, supporting analog and discrete logic requires you to negotiate, procure, store, and place numerous discrete devices and their associated passives on the PCB.<\/p>\n<p style=\"text-align: start;\"><strong>Simplify Power Sequencing With Programmable Logic<\/strong><\/p>\n<p style=\"text-align: start;\">The Texas Instruments (TI) TPLD1202 PLD is a single-chip solution that can meet the requirements of our example power sequence. This PLD includes up to 40 different logic elements and is easily configurable to support a wide range of applications.<\/p>\n<p style=\"text-align: start;\">TI\u2019s InterConnect Studio design tool provides a drag-and-drop interface to design, simulate, configure, and program TI PLDs without the need for coding. Figure 3 is a screenshot of InterConnect Studio and the power-sequencing circuit used to configure the TPLD1202 device.<\/p>\n<p style=\"text-align: start;\"><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/202411270955445544832525f9eceb6284ccbe364ea4e24be4ae6d9.png\" alt=\"\" data-href=\"\" \/><\/p>\n<p style=\"text-align: center;\"><em><strong>Figure 3. TPLD1202-based power sequencing through InterConnect Studio. [click to enlarge]<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: start;\">The circuit in Figure 3 uses an input-enable signal fed into a counter. The control data of the counter block, combined with the clock from the internal oscillator, sets the delay between each sequence signal. Since the counter reset triggers on the rising and falling edge of the enable signal, the device does not signal to begin power down until the input enable signal falls.<\/p>\n<p style=\"text-align: start;\">If we wanted to change the timing of the power-sequencing controller, a discrete resistor-capacitor network would require new RC values and a change to our bill of materials. With a PLD design, we could simply reconfigure the internal oscillator and associated dividers without needing to modify the bill of materials.<\/p>\n<p style=\"text-align: start;\"><strong>Powering Additional Voltages Up and Down<\/strong><\/p>\n<p style=\"text-align: start;\">Since the example application relies on a battery for its power source, the voltage can vary based on the battery&#8217;s state. Building on the previous example, you can use additional logic functions to add another power-sequencing use case.<\/p>\n<p style=\"text-align: start;\">In Figure 4, the TPLD1202 checks for a specific voltage or voltage range on the POWER3 feedback before enabling POWER3. It then moves on to the POWER4 feedback to verify its requirements against the battery voltage (Figure 4). Only after meeting these voltage requirements will the product fully power up for operation.<\/p>\n<p style=\"text-align: start;\"><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/20241127095726572614b646867e26f6ea9c9ff6d7a370fa6bf6cf2.png\" alt=\"\" data-href=\"\" \/><\/p>\n<p style=\"text-align: center;\"><em><strong>Figure 4. TPLD1202 power sequencing with voltage monitoring. [click to enlarge]<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: start;\">For power-down sequences, you can ensure safe power-down by using the same parameters monitored during power-up in reverse.<\/p>\n<p style=\"text-align: start;\">Tables 1 through 3 outline the savings achieved when using TI PLDs for power sequencing. As a starting reference, Table 1 identifies the 19 discrete components and their package sizes.<\/p>\n<h5 style=\"text-align: center;\"><em><strong>Table 1. Discrete logic bill of materials<\/strong><\/em><\/h5>\n<p><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/202411270958135813f2bfd047ecc0b87569fa543eed720aa79c151.png\" alt=\"\" data-href=\"\" \/><\/p>\n<p style=\"text-align: start;\"><span style=\"color: #000000; background-color: #ffffff;\">As shown in Table 2, we can use a single PLD with a package size smaller than each of the 19 individual discrete components.<\/span><\/p>\n<h5 style=\"text-align: center;\"><em><strong>Table 2. Programmable logic bill of materials<\/strong><\/em><\/h5>\n<p><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/202411270958435843bf3ff033eb8ecf9abde8039e8e57dfc32e4c6.png\" alt=\"\" data-href=\"\" \/><span style=\"color: #000000; background-color: #ffffff;\">Finally, Table 3 shows the reductions in the bill-of-materials and the PCB area. A single TI PLD can translate into PCB space savings of over 99% and PCB cost savings of over $1 compared to discrete logic designs.<\/span><\/p>\n<h5 style=\"text-align: center;\"><em><strong>Table 3. PCB area comparison<\/strong><\/em><\/h5>\n<p><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/20241127095903593460a9a4a5bebf64ff31ba3a46b2ffeba68776.png\" alt=\"\" data-href=\"\" \/><span style=\"color: #000000; background-color: #ffffff; font-size: 14px;\">Further savings can be realized by eliminating the procurement costs associated with obtaining an additional 19 devices. For simplicity, we did not include passive components in our comparison, but you can also expect savings of up to 90% on the passives required for a TI PLD design.<\/span><\/p>\n<p style=\"text-align: start;\"><strong>Other PLD Use Cases<\/strong><\/p>\n<p style=\"text-align: start;\">PLDs offer configurable logic with both digital and analog functions, popular interfaces, and integrated features such as oscillators that can optimize your design for:<\/p>\n<ul>\n<li style=\"text-align: start;\">Functionality<\/li>\n<li style=\"text-align: start;\">Bill of materials<\/li>\n<li style=\"text-align: start;\">PCB area<\/li>\n<li style=\"text-align: start;\">Procurement costs<\/li>\n<li style=\"text-align: start;\">Manufacturing costs<\/li>\n<\/ul>\n<p style=\"text-align: start;\">PLDs also do not have the overhead associated with competing solutions such as field-programmable gate arrays. TI\u2019s PLDs are simple to configure and program because you don\u2019t need any experience with hardware description languages to use InterConnect Studio.<\/p>\n<p style=\"text-align: start;\">These PLD benefits also make them suitable for input\/output expansion, sensor interfaces, LED control, and voltage monitoring.<\/p>\n<p style=\"text-align: start;\">\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Programmable Logic Devices (PLDs) are revolutionizing power-up sequencing in electronic systems. By integrating multiple discrete components into a single chip, PLDs simplify designs, reduce costs, and enhance reliability. This article explores the role of PLDs in power-up sequencing, their advantages over traditional methods, and best practices for implementation.\u200b What Is Power-Up Sequencing and Why Is [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":557,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[187],"tags":[230,374,376,375],"class_list":["post-556","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-power-management","tag-plds","tag-power-sequencing","tag-system-reliability","tag-voltage-ramp-control"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>How Programmable Logic Devices Enhance Systematic Power-Up Sequencing - Fly-Wing<\/title>\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\/using-programmable-logic-devices-for-systematic-power-up-sequencing\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"How Programmable Logic Devices Enhance Systematic Power-Up Sequencing - Fly-Wing\" \/>\r\n<meta property=\"og:description\" content=\"Programmable Logic Devices (PLDs) are revolutionizing power-up sequencing in electronic systems. 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