Tool/software:
Hello everyone:
Using a full-bridge load to drive the motor in continuous mode, there is no problem with open circuit detection. But when the channel is operated in PWM mode, as long as the duty cycle is smaller, the time magnitude larger than the OLD deglitch time. This channel will determine Open circuit and set IC_STAT.OLD =1.
Even if negative current active open load detection is set, it cannot completely solve the misjudgment problem. (ex. OLD_NEG_EN=1, an OLD warning will be issued when the duty cycle is less than 40%; OLD_NEG_EN=0, a warning will be issued when the duty cycle is less than 60%)
In this case, what needs to be done to detect open circuits in a low duty cycle environment? Or does Passive Open Load Detection have to be used?
Thanks.
