TPS2421-1: when load current exceed 1.6*Ilim, will the device shut down?

Ruixin Feng

Intellectual 2405 points

Part Number: TPS2421-1

Hi team,

Customer want to know that if when load current exceed 1.6*ILim, will the device shut down at once?

Thanks!
Rayna

over 2 years ago

0 Avishek Pal over 2 years ago

TI__Mastermind 39820 points

Because of the holidays, TI E2E design support forum responses may be delayed through Jan. 3. Thank you for your patience.

0 Kunal Goel over 2 years ago in reply to Avishek Pal

TI__Guru* 79181 points

Hi Rayna,

Please refer below snippet from datasheet:

0 Ruixin Feng over 2 years ago in reply to Kunal Goel

TI__Intellectual 2405 points

Hi Kunal,

Thanks for reply!

I asked this question because we met an issue in customer side.

You can see below waveform: the blue one is load current, it shows a transient overcurrent (~12.2A) because a light is turned on in system. The origin load current is ~700mA. The yellow one is output voltage. It seems be limited but then turn to normal. But as datasheet described, the device should immediately shut off current. I was wondering why the output voltage go down and then back to normal. Does the device enter into startup mode?

I also attached the schematics for your reference. Could you pls help to review it? Thanks a lot!