TPS65987D: Over current protection partially working

Jannis Bader

Part Number: TPS65987D
Other Parts Discussed in Thread: TPS65987

Hello,

I use the TPS65987 as a DFP PD Controller. It has 4 PDO's (5V/3A, 9V/3A, 15V/3A and 20V/4.5A). The Controller works fully at the 9V and 15V PDO's. The overcurrent protection doesn't work as expected. @5V the PP cuts the current at 1.4A and @20V at 3.3A.

I changed alot of settings in the Application Customization Tool. Nothing made a change to the overcurrent protection.

I attached the File for the configuration.

Thanks.

Jannis

Configuration_TPS65987.pjt

10 months ago

0 Chris Sterzik 10 months ago

TI__Guru 53525 points

Hello,

Can you also provide a PD log and scope measurements of VBUS voltage and current when the current reaches the currents described:

Jannis Bader said:
@5V the PP cuts the current at 1.4A and @20V at 3.3A.

Regards,
Chris

0 Jannis Bader 10 months ago in reply to Chris Sterzik

Prodigy 10 points

Hello Chris,

I have solved the problem with the 5V (The UFP has not been programmed correctly), but I have found out that at 20V the DFP sends 4.5A as PDO, but for some reason the UFP does not receive this way.

Do you need further information?

Regards,
Jannis

Configuraton_TPS65987_New.pjt