Tool/software:
This is a schematic of DRV8412 drive a therm heater.
I encountered the following problem:
1.DRV8412 is damaged, OUT_A&OUT_B has output, OUT_C&OUT_D has no output, strangely, the Fault pin and OTW pin are high. Is this an OTSD occurs? According to datasheet, RESET_CD need to have a low to high transition to clear the fault and FAULT signal, and this method does not restore OUT_C/D output.
Is this internal chip damage? How to determine what causes chip outC&D no output?
2.In a typical circuit with datasheet, the output does not require inductors. In this design, will out_A/B accessing both inductors cause the current to reverse puncture the drive sensor? Or do you have a better suggestion?
3. DRV8412 (Power Pad Down): up to 2 × 3-A Continuous Output Current (2 × 6-A Peak) in Dual Full-Bridge Mode. What limits the continuous output current? How to maintain 1.5A continuous current?
Looking forward to your reply. Thanks!
