ISO5451: Pull-up/down resistor value

Shaofeng Luo

Intellectual 1470 points

Part Number: ISO5451

Hi team

Do we have a specific value of pull-up/down pin? Like IN+ and IN-.

BTW, should we add a RC filter between MCU and ISO5451? If so, do you have a recommended RC values? Thanks!

3 months ago

0 Vivian Qi 3 months ago

TI__Expert 4370 points

Hi Shaofeng,

I found this post that talks about PU/PD resistances :)

It's recommend to add an RC filter if the trace is long from the MCU to the gate driver. I would recommend a ~100ohm resistor and a ~100pF capacitor as a starting point, and fine tune it to suit the system.

Thank you!

Vivian

Power management

Power management forum

ISO5451: Pull-up/down resistor value