This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV8702-Q1: DRV8702 Capacitor Range across VM-VCM

Part Number: DRV8702-Q1

Hi,

Is it OK to use 2.2uF capacitor between VM and VCM for DRV8702-Q1? I'd like to know if anything happen if I use capacitance not 1.0uF because 2.2uF is easier to prepare.

Best regards,

Itoh

  • Hi Itoh-san,

    It is not recommended for the following reasons:

    1) The device was designed and simulated to use a 1uF capacitor from the VCP pin to the VM pin. The expected variation is typically +/-50%.

    2) Increasing the capacitor can change the switching frequency. The charge pump switching frequency could be below the min value. NOTE: This may be beneficial in some cases.

    3) The devices are not tested to operate using the larger VCP capacitor. This could be a problem in the event of a failing device.