TPS25730: SINK_EN behaivor

Hello,

Kotaro Yamashita said:

In my understanding SINK_EN is toggled when USB C is connected both PD contracts and implicit contracts. Is this correct? 

The /SINK_EN is active (low) when the power path is enabled.  This can be in either an implicit or PD(explicit) contract.

Kotaro Yamashita said:

In case of PD contracts and negotiation doesn't complete, SINK_EN will be toggled or not?

No.  The SINK_EN will remain low because the power path remains enabled with the implicit contract.  If there is a fault on the PD, related to the negotiation not completing per the specification, then an error recovery will occur.

I cannot find the specific use case you are requesting in the datasheet examples.  This is the closest I have found where the source does not support the power required by the TPS25730 and results in a mismatch.

https://www.ti.com/lit/ds/symlink/tps25730.pdf#page=45

Do you have an EVM and setup to test?  What is the negotiation doesn't complete use case?

Regards,
Chris

Chris,

Thanks for your comment. This isn't exact evaluation, just question from my customer. Let me discuss this.

Regards,

Kotaro Yamashita