Patent ID: 9225245
Filing Date: 2015-12-29
Classification: H02M,Y02B

Abstract:
1. A power supply device comprising: a coil; a first switch circuit that is connected to a first terminal of the coil and accumulates energy in the coil; a plurality of second switch circuits that are connected between a second terminal of the coil and a plurality of output terminals, respectively; a first control unit that is connected to the plurality of output terminals and generates a first control signal for controlling the first switch circuit to turn on and off based on a combined value of a plurality of output voltages respectively output from the plurality of output terminals and a first reference value; a second control unit that is connected to only a first output terminal of the plurality of output terminals and generates a second control signal for controlling the plurality of second switch circuits to turn on and off in a cycle that is the same as the first control signal based on a first output voltage, which is output from the first output terminal, and a second reference value; a first diode arranged between the first output terminal and the second terminal of the coil and including an anode connected to the second terminal of the coil and a cathode connected to the first output terminal; a second diode arranged between a second output terminal, which is other than the first output terminal among the plurality of output terminals, and the second terminal of the coil, wherein the second diode includes an anode connected to the second output terminal and a cathode connected to the second terminal of the coil; and a first detection circuit that generates a first detection signal when detecting that one of the plurality of second switch circuits is not turned on within one cycle of the first control signal, wherein the first output voltage output from the first output terminal is a highest one of the plurality of output voltages, and wherein the first control unit includes a combining circuit, which combines the plurality of output voltages, and is configured to electrically disconnect an output terminal, which is connected to the one of the plurality of second switch circuits that is not turned on, among the plurality of output terminals, from the combining circuit in response to the first detection signal.