Electronics > Projects, Designs, and Technical Stuff
sg3525 gets mosfets heated
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
Navigation
[0] Message Index
[#] Next page
Go to full version