Hey everyone,
I have made a circuit to convert straight dc to dc square wave at relative low voltage (30v) but high current (around 200amps). I have trialed this circuit at 12vdc with a spotlight as the load and it works perfectly. however when it i trialed it at higher power levels the Mosfet's almost instantly exploded and or cracked. These mosfet's are rated at 55v, 169amps.
As for cooling, There are 4 of these mosfets on a large water cooled aluminum heat sink.
I am driving the gates at 12v around 300hz, so i am fairly sure they are hard switching.
Here's the circuit diagram.
Mosfet's = International rectifier IRF1405PbF, here's a link to the data sheet, https://www.alliedelec.com/m/d/036c4829fe1cdc1aa06c26f2750d2805.pdf
R1 = 47Ohm
R2 = 10kohm
R3 = indicates load.
I have made a circuit to convert straight dc to dc square wave at relative low voltage (30v) but high current (around 200amps). I have trialed this circuit at 12vdc with a spotlight as the load and it works perfectly. however when it i trialed it at higher power levels the Mosfet's almost instantly exploded and or cracked. These mosfet's are rated at 55v, 169amps.
As for cooling, There are 4 of these mosfets on a large water cooled aluminum heat sink.
I am driving the gates at 12v around 300hz, so i am fairly sure they are hard switching.
Here's the circuit diagram.
Mosfet's = International rectifier IRF1405PbF, here's a link to the data sheet, https://www.alliedelec.com/m/d/036c4829fe1cdc1aa06c26f2750d2805.pdf
R1 = 47Ohm
R2 = 10kohm
R3 = indicates load.