TPS25940: Current Foldback

Michael Balourdas

Expert 5455 points

Part Number: TPS25940

Hi team,

Are there any TI eFuses with a current foldback response or something similar?

Thanks,

Michael

over 5 years ago

0 Rakesh over 5 years ago

TI__Guru** 105361 points

Hi Michael,

Thanks for reaching out!

Do you mean current limit foldback with system temperature or folding back the current during fault mode (overload /short circuit) ? What is the specific advantage over constant regulated current for this application ?

Please let me know so that we can propose a simple workaround to suit the need.

Best Regards, Rakesh

0 Michael Balourdas over 5 years ago in reply to Rakesh

TI__Expert 5455 points

Hi Rakesh,

The latter, foldback during fault mode. I will ask my customer what the need for this feature is.

Thanks,

Michael

0 Rakesh over 5 years ago in reply to Michael Balourdas

TI__Guru** 105361 points

OK Michael.

0 Michael Balourdas over 5 years ago in reply to Rakesh

TI__Expert 5455 points

Rakesh,

It's going to be connected to a motor so we want the motor to just slow down in a fault condition rather than stopping and starting.

Thanks,

Michael

0 Rakesh over 5 years ago in reply to Michael Balourdas

TI__Guru** 105361 points

Hi Michael,

Most of our devices maintained regulated current in fault mode till they get thermal shutdown due to the power stress.

TPS259241 has thermal fold-back (2-12%) of current in current limit mode. Please refer Figure 36 in the datasheet and check if it suits.

BR, Rakesh

Power management

Power management forum

TPS25940: Current Foldback