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UC1844A: Issues with compensation and IC not providing continuous PWM signals

Part Number: UC1844A
Other Parts Discussed in Thread: UC3844A


I am using UC3844A IC for my Flyback simulation.

Simulation input conditions, Frequency 200KHz, Output voltage is 20V. and Input current is 0.55A.

Facing following Issues 1. Discontinuous gate pluses, 2. MOSFET draws very high current (18A) and Feedback compensation for 200KHz.

here I am attaching waveforms and circuit for the same.