ＤＣ／ＤＣ转换器;DC/DC CONVERTER

摘要

本发明提供一种即便于电源电压启动时或因负载短路而导致输出电压变为0V时亦可使电路进行动作而能够进行稳定的控制的DC/DC转换器。本发明的DC/DC转换器包括接通计时电路，该接通计时电路具有：涟波生成电路，根据控制信号生成并输出涟波成分；平均化电路，输出将涟波生成电路平均化所得的信号；计时电路，根据平均化电路的信号与控制信号而生成并输出接通时间信号；以及启动电路，使涟波生成电路的输出端子的电压上升为规定的电压。; an averaging circuit that outputs a signal obtained by averaging the ripple generating circuit; a timer circuit that generates and outputs an ON time signal according to the signal of the averaging circuit and the control signal; and a start-up circuit that increases a voltage of the output terminal of the ripple generating circuit to a predetermined voltage.