60-W, USB Type-C^® Buck Converter Reference Design

Description

This reference design is a 48-V input, 5-V to 20-V output, USB Power Delivery (PD) Source-only design. A wide VIN buck converter is employed to accept input voltage from 30 V to 60 V. The design uses a TPS65987DH USB PD controller to manage the USB PD communication and to control the feedback divider of the buck converter. A Tiva™ TM4C123GH6PM Arm® microcontroller and USB Micro-B connecter is included to provide compatibility with the TPS65987DH 6.1.X GUI tool. The design supports 5 V at 3 A, 9 V at 3 A, 15 V at 3 A, and 20 V at 3 A USB PD Source contracts.

Features

Wide input buck converter for delivering power from poorly-regulated supplies
USB Type-C PD (Power Delivery) Source supporting 20-V at 3-A, 15-V at 3-A, 9-V at 3-A, or 5-V at 3-A outputs
96.8% maximum efficiency at 48-V input and full load
External SPI Flash removes the need for microcontroller host device
Optional microcontroller for easy programming of USB Type-C PD controller serial peripheral interface (SPI) Flash over USB Micro-B