Patent ID: 9158318
Filing Date: 2015-10-13
Classification: G05F,H02M

Abstract:
1. A power supply apparatus, comprising: a first transistor configured to output an output voltage; a voltage divider circuit configured to divide the output voltage; a second transistor including a first end connected to an output node of the voltage divider circuit, the second transistor being configured to operate based on an output voltage switching signal; a first condenser provided between the first end of the second transistor and a control terminal of the second transistor; a differential amplifier circuit configured to amplify a voltage from the voltage divider circuit based on a reference voltage, the differential amplifier circuit being configured to receive a first feedback voltage when the second transistor is turned on, and to receive a second feedback voltage, which is higher than the first feedback voltage, when the second transistor is turned off; a first inverter configured to output the output voltage switching signal to the control terminal of the second transistor; a first constant current source configured to output an input voltage to the first inverter; and a second constant current source provided between the first inverter and a low-potential power supply.