Multi-phase boost converter with phase self-detection and detecting circuit thereof

摘要

A multi-phase boost converter with phase self-detection and a detecting circuit thereof are provided. The multi-phase boost converter comprises M switching circuits, a capacitor, a control circuit and a detecting circuit. Each switching circuit has an input end and an output end. N inductors are coupled in parallel between the input ends and an input voltage. The output ends are coupled to an output voltage. The control circuit controls the conduction status of the switching circuits according to a feedback voltage corresponding to the output voltage. The detecting circuit coupled between the input ends and the control circuit detects the conduction status between the input voltage and each of the input ends, for outputting a first control signal. The control circuit controlled by the first control signal selectively controls at least one of the switching circuits. N is a positive integer less than or equal to M.

主权项

1. A multi-phase boost converter with phase self-detection, comprising:
M switching circuits, each of the switching circuits having an input end and an output end, wherein N inductors are respectively coupled in parallel between the input ends and an input voltage, and the output ends are coupled to an output voltage; a capacitor, coupled between the output voltage and a grounding voltage; a control circuit, controlling conduction/cutoff status of the switching circuits according to a feedback voltage corresponding to the output voltage; and a detecting circuit, coupled between the input ends and the control circuit, the detecting circuit detecting the conduction status between the input voltage and each of the input ends, for outputting a first control signal accordingly; wherein the control circuit selectively controls at least one of the switching circuits according to the first control signal, M is a positive integer which is greater than one, N is a positive integer less than or equal to M.