Patent ID: 8922932
Filing Date: 2014-12-30
Classification: H02M

Abstract:
1. A power supply circuit for generating an output voltage from an input voltage, comprising: a plurality of output circuits each of which includes a serial circuit of a first switching element connected to a terminal to which the input voltage is applied and a second switching element connected to a reference potential line, and is capable of generating a voltage to be a base of the output voltage from a node between the first and second switching elements; and a control circuit configure to control ON/OFF of the first and second switching elements of each output circuit based on a feedback voltage corresponding to the output voltage, wherein the control circuit operates in one of a plurality of modes including a first mode in which only a first output circuit is used between the first and second output circuits included in the plurality of output circuits for generating the output voltage and a second mode in which the first and second output circuits are used for generating the output voltage, and when changing from operation in the first mode to operation in the second mode, start of the operation in the second mode in a state where the second switching elements of the output circuits are turned on is inhibited.