help about DRV8432

  We company now use the IC DRV8432.We found that DRV8432's B output is lower than the designed  voltage too much.And the bootstrapt voltage is low too.The working frequency is   200KHZ and the bootstrapt is 0.1uF.But the other three voltages are normal.

Could you give some advice?Thanks very much.

Yours sincerely

 Kathy