TPS25820: No current advertisement is taken place

Juan Jose Frutos Andreu

Part Number: TPS25820
Other Parts Discussed in Thread: TPS25821

Hi,

Since a while I have been looking for the most simplest PD CC controller IC. I found the TPS25820 PN and I though it was the best choice for the design. We were facing a sort of PowerBank design, with the TPS25820 as CC controller.

For an early testing phase, we introduce a 5.1K resistor attached to CC line in order to simulate a Sink device. The design worked fine, the TPS25820 was sourcing the 5V to the Type C connector. Untill here everything worked just fine.

The issue is that after the resistor is removed, no matter which PD compilant system is attached to the design, that the TPS25820 is not sourcing the 5V.

We have checked if there were an error in the USB type C layout, but we found nothing, seems that everything is Ok. My team has spent a week testing the design, and we came to the conclusion that the TPS25820 is not working properly.

We are testing the design against a PD compilant mobilephone and different powerbanks, but the TPS25820 is not sourcing the 5V.

Is there any issue with the TPS25820? Do you think that if we relaple the TPS25820 for the TPS25821, the system might work?

Need some support in this matter. Best Regards,

Juanjo

over 5 years ago

0 Darwin Fernandez over 5 years ago

TI__Mastermind 40120 points

Hi Juanjo,

Can you check if the UFP is going LOW? If not, then the TPS25820 is probably not detecting a valid sink device so it won't power the load. You can order an EVM and connect it to your sink device as well to verify if it outputs the 5V to Vbus. If so, then you may want to compare your schematic to the EVM to narrow down where the issue might be. Thanks!

0 Juan Jose Frutos Andreu over 5 years ago in reply to Darwin Fernandez

Intellectual 610 points

Hi Darwing,

We found the issue.

The thing is that in our design we use a plug (male) connector as USB C connector. The thing is that due to both CC lines were connected to both devices, seems that the whole system wasn't able to make the current advertisement. Removing one of the CC traka of the PCB the system works just fine.

Could this solution to be a future problem?

Best regards,

Juanjo

0 Darwin Fernandez over 5 years ago in reply to Juan Jose Frutos Andreu

TI__Mastermind 40120 points

Hi Juanjo,

Note for Standard Type C (male connector or not), the UFP should advertise a Rd to the TPS25820 in order to source power to load. In addition, CC1 and CC2 should be independent paths (one should not affect the other). Have you tried testing with the TPS25820EVM?

Regards,
Darwin

0 Darwin Fernandez over 5 years ago in reply to Darwin Fernandez

TI__Mastermind 40120 points

Hi Juan,

Please let me know if this is resolved by clicking the resolved link. This thread will close and a new post can be added as necessary. Thanks!

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TPS25820: No current advertisement is taken place