DRV8873-Q1: DRV8873HPWPRQ1

Tool/software:

Hi,

1.Could you provide the equation for finding bulk capacitor value in the application of DRV8873 motor driver used to drive solenoidal valve (32V ,2A )?

As mentioned in TI forum related thread, it's recommended to use 4uF/W, so we proceeded with value of 220uF for our application.

2. Even after placing this bulk capacitor , we are observing the huge spikes for some microseconds of amplitude 28V at output1 & output 2 of the DRV8873 motor driver.

3. Same kinda spikes were observed at the evaluation board also at OUT1 & OUT2.