A new family of single-stage isolated power-factor correctors with fast regulation of the output voltage

Abstract

-A new family of singlestage isolated power-factor corredors features fast regulation of the output voltage, one or two power switches operated in unison, a single control loop, and automatic shaping of the line current. We give topologies, steadystate analysis, design mnsiderations, and experimental results. TOPOLOGIES AND OPERATION A. TopologiesThe topologies of the members of the new family can be derived from the general structure shown in Figure 1.

Fast‐scale bifurcation in single‐stage PFC power supplies operating with DCM boost stage and CCM forward stage

“…For low-power applications (below 200 W), a cost-e ective solution is to use a single-stage design in which the power-factor-correction stage is integrated with the dc-dc power stage [1]. Such a design utilizes discontinuous conduction mode of operation of the boost stage to simplify the power-factor-correction control.…”

“…The single-stage isolated power-factor-correction power supply (SSIPP) proposed by Redl et al [1] is a cost-e ective design solution for power supplies that are required to provide a high power factor and a well-regulated dc output voltage. The circuit typically takes the form of a cascade combination of a discontinuous conduction mode (DCM) boost converter and a dc-dc converter.…”

“…The dc-dc converter stage, operating in either mode, provides a regulated output voltage via a voltage feedback loop. Operating the dc-dc converter stage in DCM at constant frequency enjoys constant voltage stress of the storage capacitor irrespective of the magnitude of the output load [1,2], but is generally 2. SYSTEM DESCRIPTION The single-stage isolated PFC converter under study is shown in its original form in Figure 1 [1].…”

“…Operating the dc-dc converter stage in DCM at constant frequency enjoys constant voltage stress of the storage capacitor irrespective of the magnitude of the output load [1,2], but is generally 2. SYSTEM DESCRIPTION The single-stage isolated PFC converter under study is shown in its original form in Figure 1 [1]. It can be modelled as a cascade connection of a boost converter and a buck converter, which are driven synchronously under one switching pulse-width-modulation (PWM) signal, as shown in Figure 2 [27].…”

Fast-Scale Instability of Single-Stage Power-Factor-Correction Power Supplies

“…T HE single-stage isolated power-factor-correction (PFC) power supply (SSIPP) proposed by Redl et al [1] is a cost effective design solution for power supplies that are required to provide PFC and tight output regulation in the low-power range. The circuit basically employs a cascade structure consisting of a boost PFC converter and a forward converter for output regulation [1].…”