Multi-phase dc-dc power converter
AssigneeuPI Semiconductor Corp.
InventorHua-Chiang Huang
Life of this patent
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Abstract
A multi-phase DC-DC power converter is provided, which includes a pulse width modulation (PWM) controller and a plurality of output stage circuits. The plurality of output stage circuits converts an input voltage into an output voltage. The PWM controller includes a feedback circuit and a PWM generation module. The feedback circuit outputs a trigger signal according to the output voltage and a ramp signal. The PWM generation module at least generates a first PWM signal and a second PWM signal. In addition, a waveform of the first PWM signal partially overlaps a waveform of the second PWM signal at a logic high level.
Claims12
A multi-phase direct current (DC)-DC power converter, comprising:
- a plurality of output stage circuits, configured to convert an input voltage into an output voltage;
- a feedback circuit, used for outputting a trigger signal according to the output voltage and a ramp signal;
- a phase channel selector, used for generating at least two channel setting signals according to the trigger signal;
- a pulse width modulation (PWM) generator, coupled to the output stage circuits and the phase channel selector, and used for generating a plurality of PWM signals in response to a plurality of error current signals, the input voltage, the output voltage, and the channel setting signals;
- and
- a phase channel current sensor, configured to sense output currents of the output stage circuits, and calculate output current differences between the output stage circuits, so as to output the error current signals to the PWM generator, wherein the PWM generator adjusts the duty cycle of each PWM signal according to the error current signals.
A multi-phase DC-DC power converter, comprising:
- a plurality of output stage circuits, configured to convert an input voltage into an output voltage;
- and
- a pulse width modulation (PWM) controller, coupled to the output stage circuits, and used for generating a plurality of PWM signals according to the input voltage, the output voltage, and a reference voltage, so as to control the output stage circuits according to the plurality of PWM signals, and the PWM controller comprising:
- a feedback circuit, used for outputting a trigger signal according to the output voltage and a ramp signal;
- and
- a PWM generation module, used for generating a first PWM signal with a fixed on time and a second PWM signal with the fixed on time, and adjusting the duty cycles of the first PWM signal and the second PWM signal according to the trigger signal, the input voltage, and the output voltage.
Dependencies are inferred from the claim text.