CCG3PA is not responding with GoodCRC when Requested Voltage is 3.3V APDO

[PrM_1403381]

Hi,

I am using CCG3PA in my design, I have made some changes to send request messages to custom PDO's, I am able to send the request messages using available API's in CCG3PA API guide. When I send a request to APDO 3.3 Volts Request sending is proper. But After receiving PS_RDY from DUT(Source), CCG3PA is not responding for PS_RDY message. When I request for APDO 3.8 Volts CCG3PA is responding for PS_RDY message.

I have attached, CC line Sniffer capture also. To open the file please download the software (GRL USB Type-C™ Power Delivery Performance Analyzer (GRL-USB-PD-A1)) from link : https://graniteriverlabs.com/download-center/

It looks CCG3PA will not respond when Vbus Voltage goes below 3.7 Volts, If yes, How to handle APDO request voltage 3.3Volts in CCG3PA ?

Please, Let me know if any inputs needed.

Thanks & Regards

Prasanna

[RajathB_01]

Hi Prasanna,

Please re-attach the CC capture file that can be opened in your software.

I will take a look.

Regards,

Rajath

[PrM_1403381]

Hi Rajath,

Please find the attached CC line capture.

To open the file please download the software (GRL USB Type-C™ Power Delivery Performance Analyzer (GRL-USB-PD-A1)) from link : https://graniteriverlabs.com/download-center/

If any inputs needed please let me know.

Thanks & Regards,

Prasanna

[PrM_1403381]

Hi Rajath,

Were you able to open CC line capture file ? Need any inputs ?

Thanks & Regards

Prasanna

[PrM_1403381]

Hi Rajath,

Any update on this ?

Thanks & Regards

Prasanna

[PrM_1403381]

Hi Rajath,

Any update on this ?

Thanks & Regards

Prasanna

[RajathB_01 · Accepted solution]

Hi Prasanna,

There is no high level code change that can solve this problem. The PD stack needs to be modified to support APDO sink which is a heavy change and therefore will not be carried out in the near future. Some of the workarounds proposed also do not seem to be working. I request you to contact our sales team to get more support on the PD stack modification.

Regards,

Rajath