What documents to read to make 2 DRP 100w PD ports with stm32G071CBU3

[LWu.3]

I'm trying to make 2 DRP 100w ports but I can't find many related resources. Can anyone help by providing a sample code or related resources.

[Nicolas P. · Accepted solution]

Hello @LWu.3​ ,

We have no example with 2x100W DRP ports.

But you should start step by step.

1- build one port DRP with let's say 15W.

And for that you have an example here on github.(STM32G071 + shield TCPP03)

2- Add the second port.

We have an example with two ports on the G0 Eval board, even if the example is one DRP and one Sink, the principle of adding a port is available on github too.

You will see that there is a compilation switch : USBPD_PORT_COUNT=2

3- raise power up to 100W.

There this step depends on you power management. the previous example goes up to 15V@3A. It's up to your power architecture

[Mohamed S.]

Hello,

The shield TCPP03 is X-NUCLEO-DRP1M1 Nucleo Expansion Board where the TCPP03-M20 is used as a USB Type-C Port Protection for overvoltage and overcurrent protections. This Nucleo Expansion Board uses the X-CUBE-TCPP as Software Expansion where an example of Dual Role Power (DRP) is provided.

You will need 2x TCPP03-M20 to protect each DRP port, up to 100W: all PDOs from USB-C Power Delivery are available.

Please find below few learning material on single port STM32+TCPP solutions for USB-C Power Delivery, which are a good starting point before moving to two port DRP:

• Application Note: AN5225 USB Type-C Power Delivery using STM32 MCUs and MPUs
• TCPP on-demand webinar
• X-NUCLEO-DRP1M1: quick start guide and user manual

Using STCommunity, you can find FAQ on TCPP products:

https://community.st.com/s/topic/0TO3W000000hPhlWAE/tcpp