Part Number:DRV8332
Hello,
I am seeing peak current pulses of about 10-11A per phase when my BLDC motor is under load. I have the following configuration: M3=1, M2=0, M1=0. The peak current stays at this level (stays peaking at 10-11A) for a few seconds then the motor driver shuts off and faults. I have set my current limit to a 22k resistor (11.6A). I know it is current related because I can re-trigger the PWM module and the driver/motor starts right up again.
In trying to remedy this, I wanted to increase the current limit and this is where my questions stem from.
Questions:
1. Why does 13.2A (19k current resistor) require me to use OC latching mode instead of CBC mode. This comes from Table 2. Programming-Resistor Values and OC threshold.
2. How does OC latching actually work? As soon as there is a peak no mater how short a duration the driver will latch itself off?
3. If I'm in CBC mode is there a way for the driver to shut down? It seems that this is happening to me.
Thanks!
