TPS25985: ITIMER behavior in secondary mode

Joyce Lee

Part Number: TPS25985
Other Parts Discussed in Thread: TPS25990

What's TPS25985's ITIMER expected behavior during OCP in secondary mode?

We are using TPS25990+TPS25985, we observed TPS25985's (secondary mode) ITIMER drop during OCP even if the ITIMER pin is not connected to anything.

We originally used TPS25985's ITIMER to pull up SWEN, however this caused efuse not shut off during OCP. The Issue is solved after connecting SWEN to external 3.3V instead of ITIMER.

over 1 year ago

0 Avishek Pal over 1 year ago

TI__Mastermind 39240 points

Let me verify in hardware. Please give me one week.

0 Matthew Baker over 1 year ago in reply to Avishek Pal

TI__Intellectual 1110 points

Hello,

Can you please provide me with an update on the question above.

0 Joyce Lee over 1 year ago in reply to Avishek Pal

Prodigy 30 points

Any updates?

+1 Avishek Pal over 1 year ago in reply to Joyce Lee

TI__Mastermind 39240 points

Extremely sorry for the delay. I was on leave for a week and then got occupied with some critical activities.

You are correct. ITIMER pin of the secondary device will drop during OCP event if there is no capacitor connected to this pin. Please see the below waveform.