Hi Ryan,
how are you?
My inserted configuration:
Driver: DRV 8432 in full brigde, the same configuration like the DRV8432DKD evaluation board REV A.
No additional parts - resistors or capacitors - between motor and inductors.
Voltages: PVDD +24V, GVDD +12V
Controller: MSP430F249, PWM-rate 25 KHz
Motor: Brushed DC, U=24 V, P=100 W, I=5 A, L= 1.5 µH, R=0.6 Ohm
Case: metal case all-over closed and earthed. DRV-heat sink is connected with the case (2 screws).
My problem:
On the lines (motor, power, sensors) an increased disturbance frequency of 44 dBµv at 75 MHz is measurable, whose source is probably the DRV.
Now I am looking for a snubber-circuit to deepen the frequency under 30 dBµV.
Can you help me?
Thank you very much in advance for your kind efforts.
Best regards,
Peter
