Patent ID: 9184658
Filing Date: 2015-11-10
Classification: H02M,Y02B

Abstract:
1. A DC-DC converter converting an input voltage into an output voltage different from the input voltage, comprising: an input terminal which receives the input voltage; an output terminal which outputs the output voltage; a power stage comprising a high-side switch, a low-side switch and an inductor, wherein a first end of the high-side switch is connected to the input terminal, a first end of the low-side switch is connected to a ground and a second end of the low-side switch is connected to a second end of the high-side switch, and wherein a first end of the inductor is connected to the second end of the high-side switch and a second end of the inductor is connected to the output terminal; a switch driving circuit which generates a high-side switch driving signal and a low-side switch driving signal that drive the high-side switch and the low-side switch; a charge pump which generates a current of a first polarity according to the high-side switch driving signal and which generates a current of a second polarity having an opposite polarity to the first polarity according to the low-side switch driving signal; and a capacitor which generates a first voltage by integrating the current of the first polarity and the current of the second polarity generated by the charge pump, wherein the switch driving circuit generates the high-side switch driving signal and the low-side switch driving signal according to a difference between the first voltage and a reference voltage.