| Electronics > Projects, Designs, and Technical Stuff |
| sg3525 gets mosfets heated |
| (1/4) > >> |
| dave_j_fan:
dear all i am trying Sg3525 inverter. issue is Mosfets getting superhot in 2-3min original maker showed no use of heatsinks..so i have not added heatsink just running 60w tablefan pcb ofthe originalmaker is like this u cab see the connections very.clearly. please advice how to reduce heating. i swapped diodes 4007 and mosfets z44 running 60wtable fan transformer 15amp 12v |
| T3sl4co1l:
Schematic? :-// Tim |
| dave_j_fan:
attached pcb has good clarity. i will draw a schem.if not clear. |
| oPossum:
High side gate drive is probably horrible. Slow opto to turn it on, and a 2k resistor to slowly turn it off. A proper bootstraped gate driver IC would be a big improvement. |
| dave_j_fan:
any alternate circuits.. avoiding ic due to cost increase |
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