Patent ID: 8193725
Filing Date: 2012-06-05
Classification: H02M,H05B,Y02B

Abstract:
1. A voltage converter, comprising: a comparator, for comparing a reference voltage and a feedback voltage to generate a first current; a sawtooth generator, for generating a sawtooth current according to the reference voltage; a transconductance amplifier, for generating a second current according to an input voltage; a pulse width modulation (PWM) signal generator, coupled to the comparator, the sawtooth generator and the transconductance amplifier, for generating a PWM signal according to the first current, the sawtooth current and the second current; an inductor, coupled to a voltage input node; a current limiting circuit, coupled to the PWM signal generator and the inductor, for limiting a current on the inductor; and an output circuit, coupled to the inductor, the comparator and a voltage output node, for generating an output voltage and the feedback voltage according to the current on the inductor.