LM5116: LM5116

Anushree n

Part Number: LM5116

Hi,

I have designed a DC DC converter using LM5116 that has a maximum limit of input voltage upto 100V. My input may sometimes (in very rare cases) go up beyond 100V (say 120V max.). Should i provide an overvoltage protection circuit separately so that the high voltage doesnt damage the IC or other circuits connected at output end of the converter? Please clarify.

Anushree N

over 7 years ago

0 Arief Hernadi over 7 years ago

TI__Mastermind 23845 points

Yes, that is correct because the abs max for this part is 100V

Thanks
-Arief

0 Anushree n over 7 years ago in reply to Arief Hernadi

Prodigy 100 points

Hi Arief

Can you provide any suggestions from your side or any links as such, so that there wouldn't be any loss in the efficiency of the system when implemented?.

We made a try using a ZENER diode circuit but we found some difference of efficiency while we tried implementing the same.

Thanks

- Anushree

0 Arief Hernadi over 7 years ago in reply to Anushree n

TI__Mastermind 23845 points

Have you try using the TVS diode maybe?
Such as this one TPSMB100CA
Otherwise, you might have to implement some discrete solution with disconnect FET
Something like this?
www.ti.com/.../snva717.pdf

Thanks
-Arief

Power management

Power management forum

LM5116: LM5116