R7731 Circuit Diagram
Pwm controller flyback richtek triple Datasheet pdf controller burst flyback pwm triple mode R7731_3181126.pdf datasheet download --- ic-on-line
R7731_3181126.PDF Datasheet Download --- IC-ON-LINE

R7731 - Burst Triple Mode PWM Flyback Controller | Richtek Technology
R7731_3181126.PDF Datasheet Download --- IC-ON-LINE