DC-DC CONVERSION CIRCUIT, AND DC-DC CONVERSION CONTROL CIRCUIT AND METHOD

摘要

PROBLEM TO BE SOLVED: To prevent the rush current of a DC-DC conversion circuit subjected to output control by a plurality of control signals.;SOLUTION: The DC-DC conversion circuit includes a plurality of control signal generation circuits, a plurality of soft start control circuits and a start control circuit. The plurality of control signal generation circuits are provided in correspondence with a plurality of control signals and each circuit generates a corresponding control signal among the plurality of control signals based on the corresponding output value among the plurality of output values. The plurality of soft start control circuits are provided in correspondence with a plurality of control signals and each circuit controls variation in corresponding control signal at the time of starting the DC-DC conversion circuit. The start control circuit designates a corresponding soft start control circuit to start operation as an output control signal is altered at the time of starting the DC-DC conversion circuit.;COPYRIGHT: (C)2008,JPO&INPIT