The USB energy supply (PD) battery charger design incorporates a SEPIC energy provide that meets the 20V/5A 100W USB PD specification.
A Common Serial Bus (USB) Battery Charger is a tool that has USB ports to ship energy to rechargeable batteries. An influence supply (PD) charger permits quick charging by offering greater energy ranges than normal USB chargers. USB PD chargers are generally used for charging smartphones, tablets, laptops, and different moveable digital gadgets. A USB PD charger is beneficial for journey, work or examine, gaming, emergencies, simultaneous charging, and high-power gadgets. Microchip has launched the reference design of the USB Energy Supply Battery Charger to simplify the design of chargers. The design gives a easy resolution to include multi-cell Lithium-Ion battery charging into present functions. This reference design drastically minimises the necessity for in depth engineering board revisions, leading to important time and price financial savings. With a totally validated resolution available, worthwhile engineering assets could be conserved, permitting builders to concentrate on different vital elements of their tasks.
The reference design is predicated on the ATSAMD21J18A microcontroller, a low-power, 64-pin system that includes a Common Goal ARM Cortex M0+ core. The design contains a Professional Equipment on Board (PKoB) for USB programming/debugging. The USB PD charger helps two kinds of growth headers. One is a 4-pin defined skilled (Xplained Professional) energy header with an Xplained Professional Enter/Output (I/O) header; the opposite is a microcontroller bus click on board connector. The battery charger incorporates a Single-Ended Major Inductor Converter (SEPIC) energy provide that meets the 20V/5A 100W USB PD specification.
The charger utilises a relentless present/fixed voltage cost algorithm, working in three main states, pre-condition, fixed present cost, and fixed voltage cost. Within the precondition mode, the charger limits the cost present to a couple hundred milliamps if the battery voltage is just too low for full present charging. As soon as the battery voltage surpasses the pre-charge cutoff threshold, the charger will increase the present to the utmost allowed cost present.
The charger maintains a relentless present throughout the charging course of till the battery voltage approaches its most degree. Then, it switches to fixed voltage mode. On this mode, the charger periodically checks the battery voltage and adjusts the present if essential to maintain it at or barely under the utmost voltage threshold. This ensures a secure battery voltage. The charger will proceed this course of till the cost present drops under a specified cutoff degree. At that time, the charger will shut off however will stay energetic to observe the battery and carry out occasional top-offs as required.Â
Microchip has examined this reference design. It comes with a Invoice of Materials (BOM), schematics, and many others. Yow will discover further knowledge in regards to the reference design on the corporate’s web site. To learn extra about this reference design, click on right here.
