Part Number: DRV8316

Hello E2E,

About a formula (4), are Ioutx source side current only? If include the sink current, this formula is not to establish.

Best regards,
ACGUY

• Hi ACGUY,

Thanks for your question. One of our experts will respond tomorrow.

Thanks,

Matt

• Hi ACGUY,

This device does look at both source and sink current in the formula for cycle-by-cycle current limit. This is to properly measure the total current in the motor.

For example if the motor is in BRAKE state with all three low-side MOSFETs ON, the measured current would be zero (IA+IB+IC = 0) since there is no drive vector being applied.

In the case of the motor being actively driven, IA+IB+IC will not be zero and the device can regulate the drive current.

Thanks,

Matt

• Hi Matt,

The maximum current limit is 8A and Vref is 1.25V and GAIN is 0.15.
There is always a source and a sink to energize the motor, and if IoutA = 8A_source, then IoutB = IoutC = 4A_sink.
Is the total current 8A in this case? Or is it 16A?

Regards,
ACGUY

• Hi ACGUY,

Thank you for your question! One of us will try to respond to your question on Monday.

Regards,

Anthony