TPS25982: OCP response time

Hailiang Zhang

Genius 10880 points

Part Number: TPS25982

Hi Team，

I am wondering If ITIMER is left open, is the response time TSC when OCP is triggered?

Regards，
Hailiang

over 2 years ago

0 Kunal Goel over 2 years ago

TI__Guru* 79071 points

Hi Hailiang,

Short circuit response time will be same as TSC. It is independent of ITIMER cap value.

Regards

Kunal Goel

0 Hailiang Zhang over 2 years ago in reply to Kunal Goel

TI__Genius 10880 points

Hi Kunal,

What I want to confirm is if the TIMER pin stays open. When OCP is triggered, whether the delay time is 0+Tsc, where the typical value of Tsc is 400ns

Regards,
Hailiang

0 Kunal Goel over 2 years ago in reply to Hailiang Zhang

TI__Guru* 79071 points

Hi Hailang,

This device has two overcurrent thresholds. One is ILIM and other is short circuit fast trip threshold(ISC= 2.1*ILIM).

1. When current is between ILIM and ISC then device waits for ITIMER duration and after ITIMER it circuit breaks. Total response time= ITIMER+ TLIM. For ITIMER open case it is 0+TLIM= TLIM.

2. When current is above ISC then device trips without waiting for timer and response time is tSC.

Regards

Kunal Goel

Power management

Power management forum

TPS25982: OCP response time