TPS25772-Q1: How to check if the TPS25772-Q1 has entered operating mode?

Hi Yue,

Can you share your schematic?

Thanks,
Eric

Hi Eric,

I followed the TPS25772DQ1EVM schematic for the design.

This is my schematic.

In the actual circuit, R43 is 6.6K ohm, not 6.65K ohm.

Thanks,

Yue

Hi Eric,

1. This was my mistake. I used an existing module. The actual circuit indeed uses the 772-Q1 IC, and the part number is TPS25772CQRQLRQ1. 

2. The previous circuit was incomplete. Here are the remaining schematics and I2C pullups.

Thanks,

Yue

Hi Yue,

The schematic looks okay.  I'm not sure where the pulse on LDO3V3 would be coming from.

Have you loaded a full region firmware binary onto the EEPROM?  Otherwise the device will boot into a default behavior that does not include PD capability.

Regards,
Eric

Hi Eric,

In the schematics, I plan to use the endpoint to load the firmware data into the EEPROM. Since the 772-Q1 cannot connect to the PC, the EEPROM currently has no data stored.

Additionally, I measured the communication between the 772-Q1 and the EEPROM during the startup sequence, and the measurements indicate that there is no activity.

Best Regards,
Yue

Hi Eric

Thank you for your suggestion. I will conduct further testing and observe the results.

Best Regards,
Yue

Hi Yue,

Sounds good.  Hope everything goes smoothly.  Just let me know if you need additional guidance.

Regards,
Eric