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DRV8801: DRV8801 issue

Part Number: DRV8801

1. How to adjust the duty cycle to 100%? Is it enable pin?
2. In order to reduce the current ripple, what is the recommended value for the motor series inductance?
3. Select 0.3ohmItrip=1.67A
If the current is 1.2A
VPROI=5 x I I is the voltage pair generated by the motor current flowing through Rsense?
So at this time VPROI=5x(1.2x0.3)=1.8V right?

  • Hello Hsu,

    1. Yes, the ENABLE pin controls PWM for this device.

    2. We typically do not spec motor inductance for our devices. In most cases it does not have an impact. Current ripple will also depend on motor speed/back EMF and supply voltage.

    3. Your calculations look correct to me.