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UC3845: UC3845

Part Number: UC3845
Other Parts Discussed in Thread: UC3854

Hi 

I am using UC3845 IC for pwm generation for my forward converter. But it is genearting 4 KhZ frequency at Rt/CT pin no 4. but PWM is not generated at  pin 6 of UC3854 . what is the reason behind this?

Please suggest the solution.

Thanks & Regards

Dhiren Sahoo