Industry White Paper

Universal USB-C Charger Designs Enabled by Programmable Power Supply

September 29, 2021 by Infineon Technologies Download PDF

White Paper Overview

Before introducing USB Type-C connectors and power delivery, laptops and mobile phone manufacturers implemented proprietary power adapters to charge the devices. With the introduction of USB Type-C connectors by USB-IF (USB Implementers Forum), device manufacturers are moving away from proprietary designs to adopt USB Type-C connectors and ports. The new USB Type-C protocol supports charging at up to 100 W over the VBUS and uses a reversible connector for added convenience.

This paper provides an overview of the USB Type-C and power delivery specifications, programmable power supply (PPS) considerations, and how a typical battery charging system works. The paper also compares charging various sink devices (phones) with a non-PPS charger and a PPS charger and discusses the advantages of designing a universal USB Type-C charger with PPS support. Finally, it provides examples of a USB Type-C PPS power adapter design based on Infineon’s EZ-PD™ CCG3PA and EZ-PD™ PAG1 controller.

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White Paper Authors: Anshul Gulati, Principal Application Engineer, Infineon Technologies Shopitham Ram, Senior Staff Application Engineer, Infineon Technologies

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