Running a cyclic test. IN1 & IN2 reverse phase every 5 sec. connected to small PM motor which draws less than 100ma. I see the outputs switch on for ~ 2us, then off (~2v level) for 25us. This continues until I reverse states at 5 sec, then same thing but with oposite outputs states. Originally had ISEN connected thru a 2.3 ohm resistor to set limit at 150 ma. Then grounded ISEN, same thing. I also tried using a 100 ohm resistor, same thing. It seems that its running in current regulator mode even when ISEN is lower than trip threshhold. I scope the ISEN with the resistor connected and its nowhere near the trip point. I did see a spike when the drive switched on / off. The fault output never goes active.
Any ideas?