Tool/software:
Hi
My custom board has TPS65987DDK and the feature is the following.
- Sourcing Device (it can be sink but doesn't consuming power)
- Work with an external power (VIN_3V3 is powered by the external power)
- Not supported Dead battery (ADCIN1 = 10K pull down)
If I follow the steps below, VBUS keeps high.
I think this is because the TPS65987DDK continues to maintain CC Rp even though there is no VIN_3V3.
How can I make VBUS low?
Scenario
1. Connect an external power to my application board.
2. Connect a Source-only equipment to my board via USB-C.
3. TPS65987DDK on my board becomes power sink.
4. Disconnect the external power from my board.
5. As the result, VBUS remains until the Source-only equipment is disconnected.
My expected result is VBUS becomes Low after disconnecting the external power from my board.
FYI, If I tried with the following scenario, VBUS doesn't become High. This is my expected result.
1. Disconnect equipment from USB-C port and the external power.
2. Connect a Source-only equipment to my board via USB-C.
3. As the result, VBUS keeps Low.
