Patent ID: 6133650
Filing Date: 2000-10-17
Classification: H02M,Y02B

Abstract:
A DC power source device which has a plurality of DC outputs, detects an error of an output voltage based on a voltage-divided voltage of a voltage dividing circuit adapted to voltage-divide one of the plurality of DC outputs, feed back the error thus detected to the switching circuit on a primary side, and change a voltage dividing ratio of the voltage dividing circuit from a predetermined value to a value smaller than the predetermined value thereby to decrease voltages of the DC outputs, said DC power source device, with said one DC output as a reference DC output, comprising:a bleeder resistor one of the terminals of which is connected to the reference DC output, and the other terminal is connected to a secondary side ground level; anda switch providing in a current path of said bleeder resistor, for opening and closing the current path for a predetermined period of time,after the voltage dividing ratio is changed to a value smaller than said predetermined value.