TPS1H200A-Q1: Current limit delay time, tdl1 and tdl2

Oba

Part Number: TPS1H200A-Q1

Hello

I want to confirm current limit specification of TPS1H200A.
The datasheet says that when a current limit is reached, the output current holds at the setting current, but latches off after a preset DELAY time (tdl1+ tdl2).
Are these tdl1 and tdl2 just delay to Latch off of extend time of tCL(deg)?

I mean if current limit condition is recovered during these tdl1 and tdl2 time, does Latch Off occur because these are just delay time?

Regards,
Satoshi Obata

over 5 years ago

0 Cameron Phillips over 5 years ago

TI__Genius 12410 points

Hello,

The delay mechanism is used so that it will keep the device on and holding the current at a set rate for an extended period of time before it shuts off and stays off. This is useful for capacitive loads that have to be charged up initially so they will hit this current limit and instead of immediately shutting down. will stay on to charge up the cap.

0 Oba over 5 years ago in reply to Cameron Phillips

TI__Genius 17355 points

Hello,

Thanks for your reply.
So if overcurrent condition is recovered before the end of td1 and td2, this device returns to normal state without entering latch-off state.
Correct?

Regards,
Oba

0 Oba over 5 years ago in reply to Oba

TI__Genius 17355 points

Hello,

Could you please reply?

Regards,
Oba

0 Shreyas Dmello over 5 years ago in reply to Oba

TI__Mastermind 32650 points

Hi Oba,

Just to close the loop on this. Latch Off only occurs after all delays have passed.

This is useful when charging capacitive loads as Cameron mentioned

Power management

Power management forum

TPS1H200A-Q1: Current limit delay time, tdl1 and tdl2