issues on pins output,sg 3524 as used in an inverter.

[Emmanuel Akujobi]

good evening everyone,please my sg3524 pin 14 and 11 output are misbehaving,1 need a frequency of 50HZ which i was able 2 get but the voltage at that pins are 0.5v which i was not able to increase,even if i want to use a driver incorporating a transistor,it means i need a good amount of current to drive them,but with d output am having i can achieve that,please i need assistance,thanks.

 

[goldsmith]

good evening everyone,please my sg3524 pin 14 and 11 output are misbehaving,1 need a frequency of 50HZ which i was able 2 get but the voltage at that pins are 0.5v which i was not able to increase,even if i want to use a driver incorporating a transistor,it means i need a good amount of current to drive them,but with d output am having i can achieve that,please i need assistance,thanks.

Hi Emmanuel
Post the schematic which you have exactly went through .

Best Wishes
Goldsmith

 

[Emmanuel Akujobi]

,
this is the picture,i mean the circuit

 

[goldsmith]

power_inverter_op_enlarged.gif,
this is the picture,i mean the circuit

Hi Emmanuel
Your circuit is dealing with some problems . try to fix them then everything will be ok .
1-decrease value of resistors which are series with gate of mosfets . 2.2 k is absolutely high and must be decreased . try 10 ohm .
2- use a totem pole before gate of your mosfets .
3 - use two 470 uf electrolytic capacitors in parallel together and tie them through the ground and middle head of your transformer ( exactly nearby that ) .
4- use a 10 k ohm resistor in parallel with GS of each mosfet .
i.e : this circuit must not be without load because your mosfets will be burned suddenly .

Test these things and let me know the result .

Good Luck
Goldsmith

 

[Emmanuel Akujobi]

thank u sir,i will do just that