Patent ID: 9143034
Filing Date: 2015-09-22
Classification: H02M

Abstract:
1. A direct current (DC)-DC controller, comprising: a ramp generating unit, generating a first interior-ramp signal and a second interior-ramp signal; a comparator, having a first input terminal receiving an error signal, and an output terminal outputting a comparison signal, wherein the error signal relates to an output voltage; a logic circuit, generating a first control signal and a second control signal according to the comparison signal; and a switch unit, coupled to the ramp generating unit and the logic circuit, and alternately switching one of the first interior-ramp signal and the second interior-ramp signal to a second input terminal of the comparator according to the first control signal and the second control signal, wherein when the second interior-ramp signal is switched to the comparator, the ramp generating unit charges the first interior-ramp signal to a first voltage level, and when the first interior-ramp signal is switched to the comparator, the ramp generating unit charges the second interior-ramp signal to a second voltage level.