| 摘要 |
The present invention is directed to a switch mode power converter for supplying an output power to a load (R1), which includes a switching device (Sr) at the secondary side having a switching input, a switching output, and a control input a transformer (T) coupling primary and secondary sides, a switch (SW) at the primary side, for enabling or disabling the switching device from conducting current from the switching input to the switching output. The converter also includes a network (L2, C)in which the switching device input, the switching device output, and the load are connected together to form a circuit. The converter also includes a bias winding (LB) in the circuit for producing a bias voltage (VB) representative of the output power (VO), and a control circuit (CC). The control circuit is for (a) determining the rate of change of the bias voltage, (b) characterizing the rate of change, and (c) controlling the control input as a result of the characterization (b). |
