LM3481 / UVLO resister value

Ryuji

Guru 20090 points

Hello,

In the datasheet P.14, if the UVLO pin fanction is not desired , select R8 and R7 of equal magnitude greater than 100kohms.
Could you please let me know why we should select greater than 100kohms?
Are there any problem , if we use R7 and R8 smaller than 100kohms?

Best Regards,
Ryuji Asaka

over 9 years ago

0 Anston Lobo over 9 years ago

TI__Genius 16025 points

Hi Ryuji,

The only reason I can think of is better system efficiency. The UVLO senses a voltage for its operation and there is no necessity to be burning uA's of current in a divider that serves no purpose.

I hope this helps!

Thanks,

Anston

0 Ryuji over 9 years ago in reply to Anston Lobo

Guru 20090 points

Hello Anston san,

Thank you for your prompt reply.

I understood.

Best Regards,
Ryuji Asaka

Power management

Power management forum

LM3481 / UVLO resister value