DC-DC converter with adaptive phase compensation controller

摘要

A DC-DC converter for generating an output voltage from input voltage, includes: an output stage for outputting the output voltage; an error amplifier having an input and a reference input for receiving a feedback voltage at the input in accordance with the output voltage and for receiving a reference voltage at the reference input, the error amplifier generating an amplified voltage for driving the output stage, the amplifier voltage corresponding to the difference between the feedback voltage and the reference voltage; a phase compensation unit for generating a phase compensation component to the feedback voltage; and a phase compensation controller for controlling the phase of the phase compensation unit; wherein the feedback voltage determined by the output voltage plus said phase compensation component.

主权项

1. A DC-DC converter for generating an output voltage from an input voltage, comprising:
an error amplifier configured to receive a feedback voltage at a first input in accordance with the output voltage, to receive a reference voltage at a second input, and to output an amplified voltage, the amplified voltage corresponding to a difference between the feedback voltage and the reference voltage; a phase compensation circuit configured to adjust a phase of the feedback voltage, the phase compensation circuit having at least one variable impedance element controlled by a control voltage and coupled to the error amplifier; and a phase compensation controller configured to generate the control voltage by amplifying a voltage difference between the input voltage and output voltage to control a phase compensation component of the phase compensation circuit.