I have a problem that is bothering me for weeks, after frying a couple of MOSFETs and (expensive) IR2110 ICs, I still have no clue. Note that I am still a beginner when it comes to this.
The project I am working on is as follows: I need to drive 40A brushed (cordless drill) motors for my robot at high torque, both directions. Therefore I came up with a dual fullbridge (H-bridge) circuit. One H-bridge for each motor, therefore 8 N-Channel MOSFETs in total, where 4 are on the highside. Whenever I tried to drive the motor it started to whine with the frequency I was switching it, it didn't move at all.
The yellow trace is: signal in high fet(HI)
The teal trace is: signal out hight fet(HO)
The purple trace is: bootstrap voltage (VB)
The blue trace is: source voltage (VS)
ALL IN REFERENCE TO COM(GND)
I hope someone can identify the problem, I've tried several drivers, the IR2110, the IR2113, same problem. Atleast a couple of hints or tips where I should look will be a huge help. Thanks in advance. Kind regards.