true.usually too much wiring inductance around the half bridge leg can cause the mid point of the leg to go below gnd and kill the driver
For me this means: I know what causes the problem, but instead of removing the problem I add additional circuitry to remove just the symptom.try putting a bjt emitter follower pair in between to buffer the gate drive - this usually fixes it - remember to put some anti parallel schottkies across the CE of the xtors, 40V 1A.
The schematic doesn't show a connection between DC- and IR2015 ground. How does it look on PCB?
In mye eyes a "no-no".low side MOSFET source pin connected through ground through sensing resistor which is placed in external board
You finally revealed the hidden current sense circuit, but the exact overall ground and power supply wiring is still unclear. It must be taken into account if you want to understand the driver failure cause.
You reported that the driver has been damaged but MOSFETs stayed healthy. If this is true, you must have managed somehow to feed the voltage transients generated by the source resistor wiring to the driver IC, but the published schematics don't indicate how. One possible explanation is that the actual wiring is a bit different. Undershoot of the VS against COM terminal is a "popular" way to kill a bootstrap driver, review IRF AN97-3.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?