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flyback design problem...

Posted by: instinct on

ı made my circuit but ı couldn't see any voltage at primary and secondary winding of the transformer. application note:32 figure:4 is my circuit design(Primary/Enhanced Feedback Circuit)...

ı am giving the properties of my circuit below.
output power is 40 W..
output voltage is 1000V..
transformer EI33...
fS= 66 khz
ı used TOP244Y.
VACmın= 195 V
VACmax= 265 V
fline= 50 Hertz
Vbias=28 Volt

Primary;
1n4007 diode bridge
Cın=47uF 400V
P6KE180 (180 volt zener diode) + BYV26C diode
2.2 Mohm resistor for L pin
(for 66 khz C and F pin connected)
There are 6.8ohm resistor (1/4 watt) and 47 uF 50 V capacitor between F and S pin.
There is 12kohm resistor between X and S pin

Bias;
BAV21 diode + 100nf 50V capacitor
15 ohm resistor
1n5251 zener to C pin (22 volt)
100 nf 50V capacitor

Secondary;
High voltage diode( about 8KV and 0.6 A) ultrafast + 47nF 2000V capacitor

ı wait your help...

thanks...

Comments

Submitted by Jiangming Yao on 05/11/2009

Could you please also provide your transformer information and other parameters in PIXIs Designer, such as VOR, KI, KP, etc.?

Submitted by instinct on 05/12/2009

Vor= 120 V

KI = 1

KP = 0.64

VDB= 0.7

VD = 0.5