Part Number: DRV8842
Hi Team,
The customer is using DRV8842. When OCP occurs, the nFAULT outputs a low level. The customer would like to use this low level signal as a detection
signal in his design when the motor stalls. But he sets the ICHOP value. He made the mistake of ICHOP as the overcurrent value.
When he set ICHOP is 3.3A, then the motor stall current is test 2A. When he set ICHOP is 0.66A, then the motor stall current is test 0.5A.
I would like to confirm the following information:
Q1: The OCP value is 6A. This value cannot be changed. Is my understanding correct?
Q2: What is ICHOP? Is ICHOP the output current for DRV8842?
Q3: Is the customer's idea correct? I don't think the customer use this low level signal as a detection signal.
Q4: Why is the motor stall current less than the ICHOP set value?
Best Wishes,
Mickey Zhang
Asia Customer Support Center
Texas Instruments