Patent ID: 8692524
Filing Date: 2014-04-08
Classification: H02M

Abstract:
1. A direct-current (DC)-to-DC conversion apparatus, comprising: a first input terminal and a second input terminal both used for receiving a DC input power; an output terminal used for outputting a converted DC output power; an output capacitor, having a first terminal coupled the output terminal and a second terminal coupled to a ground potential; an inductor, having a first terminal coupled to the first input terminal; a first diode, having an anode coupled to a second terminal of the inductor and a cathode coupled to the output terminal; a second diode, having an anode coupled to the second input terminal and a cathode coupled to the output terminal; a first switch device, having a first terminal coupled to the ground potential, a second terminal coupled to the second terminal of the inductor, and a control terminal receiving a first pulse width modulation (PWM) signal; and a second switch device, having a first terminal coupled to the ground potential, a second terminal coupled to the second input terminal, and a control terminal receiving a second PWM signal, wherein when a voltage of the DC input power received by one of the first input terminal and the second input terminal is positive, a voltage of the DC input power received by the other one of the first input terminal and the second input terminal is negative, wherein when the voltage of the DC input power received by the first input terminal is positive, the first switch device is alternately turned-on and turned-off in response to the first PWM signal, and the second switch device is continuously turned-on in response to the second PWM signal, wherein when the voltage of the DC input power received by the second input terminal is positive, the first switch device is continuously turned-on in response to the first PWM signal, and the second switch device is alternately turned-on and turned-off in response to the second PWM signal.