Why do I need capacitors to measure the current accross RSNS in the BQ76920?

Paul K52

Intellectual 640 points

Hello,

Im trying to understand, why should I use these capacitors for the resistor Rsns?

Is it to stabilize the voltage across the resistor?

Thanks for helping.

It was not possible, to write the part number in the box.

over 7 years ago

0 WM5295 over 7 years ago

TI__Guru 54715 points

Hi Paul,
The capacitors do not help the sense resistor, they reduce noise and keep damaging transients out of the IC sense pins. If you have a very quiet system they should not be needed. If you have a system with large transients you may need additional clamps to protect the pins.

0 Paul K52 over 7 years ago in reply to WM5295

Intellectual 640 points

Thanks for your response.

Power management

Power management forum

Why do I need capacitors to measure the current accross RSNS in the BQ76920?