| 摘要 |
The circuit is for reccing the power consumption of the dummy load resistor used for preventing the hunting phenomenon of the output voltage. The circuit comprises an output voltage amplifier (10) for amplifying the secondary coil voltage of the flyback transformer, an output voltage controller (20) for controlling the transistor (Q1) with the control signal (PC) from the system, and an active dummy load section (30). The transistors Q2,Q3 control the current of a positive dummy load resistor (RL). |
