LM2940-N: LM2940S-12/NOPB

Amit Kumar Dwivedi

Part Number: LM2940-N

Hello,

What will happen if we exposed output pin of LM2940S-12/NOBP (LM2940-N) to 36V higher than max input voltage range(that is 26V)?
In design we have a diode connected between output and input for high voltage protection at output.

Regards,

Amit Dwivedi

11 months ago

0 Juliette 11 months ago

TI__Mastermind 18466 points

Hey Amit,

This can damage the upstream power supply.

Otherwise, a surge this high on the input is likely to damage the device.

Best,

Juliette

0 Amit Kumar Dwivedi 11 months ago in reply to Juliette

Prodigy 30 points

Hello Juliette,

Thanks for the support.

Can you please provide a solution for the issue?

Regards,

Amit Dwivedi

0 Juliette 11 months ago in reply to Amit Kumar Dwivedi

TI__Mastermind 18466 points

Hello Amit,

it would be best to change to a part that can handle a surge that high. do you know how long the event happens and how often?

Best,

Juliette

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

Power management

Power management forum

LM2940-N: LM2940S-12/NOPB