hi microsim,
this is the smps iam trying to make.i tested things step by step.
first i checked for sgs352 it is working ok.pin no 14 and 11 were giving 5.35 and 5.40 volts
on supplying external 12 volt supply.then i inserted irs2110 pin no 1 and 7 were giving
different voltages pin1 5.40 volts and pin 7 giving 9.7 volts(floating) .and pin no 5 also giving 9.7 volts.i removed sgs3525 it didnt made any difference..then i connected irf450 .and transformer and powerd up with bulb in series.bulb glowed for less then a second
measured voltages across both mains cap to be equal.nothing was heating.voltages on
pin 1,7 of irs2110 were same but for pin 5 it was going out of range for my dvm.same
situation was on secondary side .then i connected a 100 watt bulb on secondary.
both bulb were glowing continuosly .voltage across the secondary was 70 volts dc.
i removed the series bulb and plugged it directly the fuse blow out.i thought since it
was i amp rated i replaced it with 3 amp this time fuse blows with hiss sound .blowing
mosfets and irs2110.
can you help me out in getting it to work.i wound 5 wires of 0.5mm wire
16 primary turns.and for secondary i used 4x 0.5mm wire 8 turns 4+4 wire in parellel
on etd 49.
ihave seen in invertors both the gate drive votages shoud be same in my case they
were not
here are the schematic,pcb and transformer pics
thanks in advance
ravs
be a vegeterian.....
this is the smps iam trying to make.i tested things step by step.
first i checked for sgs352 it is working ok.pin no 14 and 11 were giving 5.35 and 5.40 volts
on supplying external 12 volt supply.then i inserted irs2110 pin no 1 and 7 were giving
different voltages pin1 5.40 volts and pin 7 giving 9.7 volts(floating) .and pin no 5 also giving 9.7 volts.i removed sgs3525 it didnt made any difference..then i connected irf450 .and transformer and powerd up with bulb in series.bulb glowed for less then a second
measured voltages across both mains cap to be equal.nothing was heating.voltages on
pin 1,7 of irs2110 were same but for pin 5 it was going out of range for my dvm.same
situation was on secondary side .then i connected a 100 watt bulb on secondary.
both bulb were glowing continuosly .voltage across the secondary was 70 volts dc.
i removed the series bulb and plugged it directly the fuse blow out.i thought since it
was i amp rated i replaced it with 3 amp this time fuse blows with hiss sound .blowing
mosfets and irs2110.
can you help me out in getting it to work.i wound 5 wires of 0.5mm wire
16 primary turns.and for secondary i used 4x 0.5mm wire 8 turns 4+4 wire in parellel
on etd 49.
ihave seen in invertors both the gate drive votages shoud be same in my case they
were not
here are the schematic,pcb and transformer pics
thanks in advance
ravs
be a vegeterian.....