Introduction

• Who

  • Daniel Puratich Architecture & Management

  • Kenny Na EE Designer

• What

  • A USB-C PD sink where we can select the output voltage with resistors

    • DNP and fitted resistors, should be foolproof 0805s

    • could be STUSB4500 - USB-C PD Sink IC

  • Intent for requesting 24V 65W when debugging https://uwarg-docs.atlassian.net/wiki/spaces/EL/pages/2701197313/RPi+Interface+Rev+C?atl_f=content-tree setup without the full drone

    • should support 12V and 5V as well for testing other boards, configured by soldering different resistors

  • Use a USB-C pd chip and the associated required FETs that are required for negotiation

  • Ideally no microcontroller

  • USB-C input connector

  • XT30 output connector

  • don't worry about board area too much but it can be tiny

  • no buck converter

• Ideas

  • https://www.st.com/resource/en/datasheet/stusb4500.pdf

Engineering

USB-C PD PMIC Selection

https://www.digikey.ca/en/products/detail/stmicroelectronics/STUSB4500QTR/9092189

https://www.digikey.ca/en/products/detail/infineon-technologies/CYPD3177-24LQXQT/10238323