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.