POWER CIRCUIT, METHOD OF SWITCHING SIGNAL OF POWER CIRCUIT, CHARGING DEVICE, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To use an IC and an output terminal in common even in the case where a driver for driving is used as an external element of the IC in association with an increase in a load without additionally installing a pre-driver and a terminal for producing a new dedicated IC or for the driver for driving, and thereby reducing costs for designing and manufacturing chips.SOLUTION: A power circuit comprises: a signal switching block 12 that switches input signals 2 and 3 in accordance with a switching selection signal 22, and outputs output signals 13 to 16; and a plurality of class D amplifiers that input the output signals 13 to 16 into respective switching elements having different channels. The signal switching block 12 determines whether to switch the plurality of class D amplifiers to be a driver for driving for driving a load or a pre-driver for an external driver circuit for driving in accordance with the switching selection signal.