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DRV8320: Capacitance value for VM-VCP.

Kengo.Y
Guru 11175 points
Part Number: DRV8320

Hi team,

Your recommended is1uF for the capacitor between VM and VCP.
Is it possible to use 0.47uF or 2.2uF?
What kind of problem do you think?

Sincerely.
Kengo.

  • +1
    TI__Mastermind 21805 points

    Hello Kengo-san,

    We are OK with changing the value up or down 1 standard capacitor value (i.e. 0.68uF to 1.5uF), however we do not recommend this in normal situations. Having a lower capacitor than recommended results in a weaker charge pump output which will have more ripple and dip whenever a MOSFET is turned ON. Having a higher value capacitor results in more inrush current and requires a longer time for the VCP voltage to stabilize on power-up.

    Thanks,

    Matt