ISOLATED BUCK-BOOST TOPOLOGIES AND CONTROL THEREOF

원문 (중국어)

A circuit includes a first stage that operates in a buck, boost, or combination of buck and boost topology. The first stage includes an input side that receives an input signal and has a plurality of switches, and an output side that applies an output signal. The first stage includes a voltage transformer having a first winding coupled to the input side and a second winding coupled to the output side, and a rectifier coupled to the second winding. A fourth stage generates a first voltage error signal based on the output signal, and a third stage generates two voltage error signals based on the first voltage error signal. A second stage receives the two voltage error signals and generates a plurality of PWM signals based on the voltage error signals, the PWM signals being used to control the switches in the first stage.