TPS5420: Replacement of TPS5420 (OCP Hiccup -> Latch-up)

KIM Andy

Part Number: TPS5420

The circuit is composed as follows using the TPS5420.

VIN: 24V -> VOUT 5.2V, IOUT 1.5A

This IC operates OCP operation in HICCUP MODE.

TI recommends that ICs that operate OCP operation by LATCH-UP be used.

over 7 years ago

0 JohnTucker over 7 years ago

TI__Guru**** 191445 points

There are several types of OCP available from TI. They all have there particular purpose. TPS5420 does in fact have hiccup mode OCP. Where do you see that TI only recommends LATCH_UP OCP?

0 KIM Andy over 7 years ago in reply to JohnTucker

Expert 2530 points

i'm sorry.I think I wrote the wrong article.
I'd like to change to latchup mode.
Is there any ic that can be changed?

0 JohnTucker over 7 years ago in reply to KIM Andy

TI__Guru**** 191445 points

So you are looking for a converter that latches off completely during an over current event and must be manually restarted?

0 KIM Andy over 7 years ago in reply to JohnTucker

Expert 2530 points

Yes, it is.

0 JohnTucker over 7 years ago in reply to KIM Andy

TI__Guru**** 191445 points

When cycle by cycle current limit is used, the output voltage will decrease when current limit is reached due to duty cycle limitations. We have a few devices that will latch off if the output voltage fals below about 65 % of the nominal value. I do not think that they will accept an input voltage of 28 V though. Perhaps some other product line has a solution. I would recommend posting a new thread without the part number and ask for a device recommendation to meet your needs,

0 KIM Andy over 7 years ago in reply to JohnTucker

Expert 2530 points

Thank you.
It has helped a lot.

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TPS5420: Replacement of TPS5420 (OCP Hiccup -> Latch-up)