Problem, Please help !!!

[hassan1980]

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]

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]

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]

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]

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]

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

 

[grittinjames]

better option is to use mosfet driver ic

or u can lm 3525 ic

 

[rajesh dwivedi]

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]

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?