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DRV8899-Q1: DRV8899 VREF

Part Number: DRV8899-Q1

Hi SIr,

My customer using DRV8899 in camera application.

Currently motor power is 1.5W 、ILIM=300~320mA、V= 5V ;

Motor spec are attach files.

Could you provide DRV889 VREF setting resistors for us? thanks.

Motor spec-2.pdf

Thanks, Ian.

  • Ian,

    To support 320mA, the VREF needs to be 0.32A*2.2V/A= 0.704V

    In the following setup, VREF= VCC*RREF2/(RREF1+RREF2)

    If VCC is 3.3V, RREF2 is 10k, RREF1 is 3.3V*10kohm/0.704V – 10kohm=36.875kohm, you can select a 36.5kohm resistor for RREF1.