Active bridge rectification

摘要

Technique for controlling a circuit that converts an AC input voltage into a DC output voltage using transistors arranged in first and second transistor pairs. Each transistor of the first pair is controlled in accordance with polarity of the AC input voltage. Each transistor of the second pair is controlled based on a difference between the AC input voltage and the DC output voltage.

主权项

1. A system for converting an AC input voltage into a DC output voltage, comprising:
first and second transistors arranged in a first transistor pair, third and fourth transistors arranged in a second transistor pair, and a controller responsive to the input voltage and the output voltage to control switching of the first, second, third and fourth transistors, the controller including an AC polarity detect circuit for determining polarity of the AC input voltage to produce a first enabling signal that enables the first transistor to turn on.