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Problem, Please help !!!

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hassan1980

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Two years ago, I built an inverter from DC to AC 12 to 220 using 12 * 2N3055 and I used 4047 for the Oscilator then,

Now I want to use Mosfet transistors instead of 2N3055 which they are IRFZ44 with the oscilator 4047 then when I connect the + of the 4047 circuit the two mosfet transistors are explode, would you please let me know what's the problem?

I am waiting your helpfull replies
 

A.Anand Srinivasan

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please post your circuit..... because i believe there is a problem due to the current drive.... if you post the circuit then it would be easy to find the problem....
 

hassan1980

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A.Anand Srinivasan said:
please post your circuit..... because i believe there is a problem due to the current drive.... if you post the circuit then it would be easy to find the problem....
This is the circuit diagram :
 

A.Anand Srinivasan

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the opamp is sourcing and sinking current and this is what damages the MOSFETs.... I think using BJT is a better idea... maybe you can use a cap between your MOSFETs gate and ground but that would slow your circuit very badly....
 

hassan1980

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A.Anand Srinivasan said:
the opamp is sourcing and sinking current and this is what damages the MOSFETs.... I think using BJT is a better idea... maybe you can use a cap between your MOSFETs gate and ground but that would slow your circuit very badly....
Dearfriend, I want to use mosfet transistors do you have a schematic for the osciolator and the driver.
 

A.Anand Srinivasan

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bias the MOSFETs so that the biasing circuit takes care of the current flow....
 

rajesh dwivedi

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u can use lm3524 as oscillater and dont forget to adjust the dead time
which will adjust by putting a preset on pin no. 9 of 3524
 

silentblade

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Hi.

I am busy with the same project and also using the IRFZ44. Lucky when searching I got to this... Please let me know if you have a circuit that can drive the mosfet without problems. How many mosfets do you have in parallel?
 

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