# i give up simulating this circuit (flyback converter cicuit)

1. ## i give up simulating this circuit (flyback converter cicuit)

hii all
i did every think to get my desired output (12V) but i couldn't i hv tried changed MOSFET and rectifier diode many times but i still didnt get my output...where is the wrong here???

Lp37.5u
Ls75u
Vin12V
Vout24V
F200kHz

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2. ## Re: i give up simulating this circuit (flyback converter cicuit)

Check some of your component values to make sure that you are indeed using the correct values.
For example, you have C3=0.01F, most spice simulators will interpret this is 0.01 femto, where fempo is $310^{-15}$, so in your case you might have a capacitor that is $310^{-17}$ Farads. Also your inductor value for L7=1pH, this is $310^{-12}$ Henries. Double check these values.

v_c

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3. ## Re: i give up simulating this circuit (flyback converter cicuit)

Originally Posted by high voltage
hii all
i did every think to get my desired output (12V) but i couldn't i hv tried changed MOSFET and rectifier diode many times but i still didnt get my output...where is the wrong here???

Lp37.5u
Ls75u

Vin12V
Vout24V
F200kHz
hello,
Plz try to simulate this circuit don't lose heart and make endeavours.i hope it'll help you.Regards

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4. ## Re: i give up simulating this circuit (flyback converter cicuit)

I don't see a polarity marking at the transformer. The waveform suggests forward instead of the intended flyback operation. But you'll see when monitoring the secondary voltage.

5. ## Re: i give up simulating this circuit (flyback converter cicuit)

Or study and simulate this circuit....

Flyback Converter

6. ## Re: i give up simulating this circuit (flyback converter cicuit)

what's the simulation software you are using ?

7. ## Re: i give up simulating this circuit (flyback converter cicuit)

thnxx alll guys i really appreciate

thnx ch wazir ya it helped, seeing my desired output for the first is sumthin great..lol..thanx aloot man.. but actually i still ddnt got my waveforms...dont know why??!!!
iam using multisim dear vamsi57

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8. ## Re: i give up simulating this circuit (flyback converter cicuit)

plz find my attached circuit..

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