Hello All,
I designed a H bridge motor driver using two identical schematics. The reason is that I tried to test MOSFETs in different size. One circuit I used TO-252 MOSFETs, it worked perfectly well. In another circuit, I used small size sot23-3 AO3400 and AO3401 MOSFETs. It cost me more than 12 P and N channel MOSFETs, still not working for a single time. They were all short circuited. By wiring to the bigger one, it worked again. I don’t know why the sot23-3 MOSFETs are so easily damaged possibly during soldering or what. Anyone has clue about this problem? Thank you all.
I designed a H bridge motor driver using two identical schematics. The reason is that I tried to test MOSFETs in different size. One circuit I used TO-252 MOSFETs, it worked perfectly well. In another circuit, I used small size sot23-3 AO3400 and AO3401 MOSFETs. It cost me more than 12 P and N channel MOSFETs, still not working for a single time. They were all short circuited. By wiring to the bigger one, it worked again. I don’t know why the sot23-3 MOSFETs are so easily damaged possibly during soldering or what. Anyone has clue about this problem? Thank you all.
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