DC to DC converter

摘要

A DC to DC converter includes an inductor having a first terminal and a second terminal, the first terminal coupled to an input of the DC to DC converter and the second terminal being coupled to an output of the DC to DC converter. A first switch is coupled between the second terminal and a current sensor. The switch controls current flow through the inductor and generates an inductor current signal representative of the current flow through the sensor. A slope generator generates a slope compensation signal. A first mixer adds the slope compensation signal to the inductor current signal. A sample and hold circuit samples a portion of the slope compensation signal. A second mixer subtracts the sampled portion of the slope compensation signal from the output of the first mixer, wherein inductor charging is terminated in response to the output of the first mixer.

主权项

1. A DC to DC converter comprising:
an input terminal for receiving an input DC voltage; an output terminal for supplying an output DC voltage; a first inductor terminal and a second inductor terminal, the first inductor terminal coupled to the input terminal, and the second inductor terminal coupled to the output terminal; a first switch operative to control an inductor current flowing from the second inductor terminal to the output terminal; a current sensor for measuring the inductor current and generating an inductor current signal; a slope generator for generating a slope compensation signal; a first mixer having an output, the first mixer for adding the slope compensation signal to the inductor current signal; a sample and hold circuit for sampling a portion of the slope compensation signal; and a second mixer having an output, the second mixer for subtracting the sampled portion of the slope compensation signal from the output of the first mixer, the first switch at least partially controlled in response to the output of the second mixer.