| 摘要 |
PROBLEM TO BE SOLVED: To control an output voltage to be within a rated voltage under a dynamic load of a switching power supply device.SOLUTION: An overshoot reduction circuit 1 comprises a differentiation circuit comprising a capacitor C2 and a resistor R4, an NPN transistor Q, resistors R5, R6, and a diode D, and has the function of detecting a voltage variation ▵Vout in an output voltage Vout in the differentiation circuit, and amplifying only an output voltage rise signal of the detected voltage variation ▵Vout in the NPN transistor Q in applying a current to a photodiode of a photo coupler PC to moderate a voltage rise in the output voltage Vout. |
