TPS65988EVM: I want to change the role of port A according to the connection of port B.

Yoshifumi Kakimoto

Part Number: TPS65988EVM

Hello,
I'm new to PD and I'm trying to make our application work with this EVM.

Requirements:
portB sinks 20V to power the system. PortB connects to USB-PD AC adaptor.
PortA DRP 5-20V to power. PortA connects to our PC(DRP).

Our use case:
case1: When PortB is SINK, PortA wants to act as a SOURCE.
case2: When PortB is not connected, PortA wants to act as a SINK.

The operation differs depending on the setting of Port A "Power Swap Strategy" of the configuration tool.
Prefers Power Source : Case1 is OK. Case2 is NG.
Prefers Power Sink : Case1 is NG. Case2 is OK.
No Preference,Supports All Swaps: Case1 is NG. Case2 is NG.

Could you please advise how to configure this?

over 3 years ago

0 Hari Patel1 over 3 years ago

TI__Genius 12700 points

Hi,

Could you please share your pjt file and we can take a look. Generally you will want to disable some capabilities and set preferences based on your desired behavior.

What role would you like PortA to be when PortB is connected and disconnected? I'm not sure I understand PortA yet.

Thank you,

Hari

+1 Yoshifumi Kakimoto over 3 years ago in reply to Hari Patel1

Prodigy 50 points

Hi,

This issue has been resolved.
By connecting the AC adapter to the PortA PC, the following operations are possible.
　Prefers Power Source : Case1 is OK. Case2 is NG -> OK.

Thank you,

Interface

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TPS65988EVM: I want to change the role of port A according to the connection of port B.