Research on Topology and Control Strategy of Single-stage High-density Power Adapter

CHEN Qingbin; ZHANG Xiangzeng; WANG Jinshuai; CHEN Yaodong; CHEN Wei

doi:10.13334/j.0258-8013.pcsee.250898

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Research on Topology and Control Strategy of Single-stage High-density Power Adapter

更新时间：2026-02-28

- Research on Topology and Control Strategy of Single-stage High-density Power Adapter
- Vol. 46, Issue 4, Pages: 1592-1603(2026)
- 作者机构：
  
  1. 福州大学电气工程与自动化学院,福建省,福州市,350108
  2. 国网福建省电力有限公司超高压分公司,福建省,福州市,350013
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.250898
  CLC：
- Published：2026
- 稿件说明：
移动端阅览
CHEN Qingbin, ZHANG Xiangzeng, WANG Jinshuai, et al. Research on Topology and Control Strategy of Single-stage High-density Power Adapter[J]. 2026, 46(4): 1592-1603.
DOI：

CHEN Qingbin, ZHANG Xiangzeng, WANG Jinshuai, et al. Research on Topology and Control Strategy of Single-stage High-density Power Adapter[J]. 2026, 46(4): 1592-1603. DOI： 10.13334/j.0258-8013.pcsee.250898.

摘要

传统75 W以上的电源适配器为了满足输入功率因数及谐波的要求，需采用两级式的拓扑结构，已经成为其功率密度进一步提升的技术瓶颈。针对该问题，提出了一种单级高功率密度的电源适配器拓扑，该拓扑在传统电源适配器电路的基础上，除去前级功率因数校正(power factor correct，PFC)电路及输入电解电容，并在反激变换器上增设一路能量补偿电路，通过控制储能电容中能量的储存与释放，可以在实现PFC功能的同时，满足输出电压纹波的要求，从而有效提升电源适配器的功率密度。据此提出了一种基于单周期控制的综合控制策略，并对拓扑中关键的电气参数进行设计。最后，搭建了一台80 W的系统原理样机验证所提方案的正确性和可行性。

Abstract

Traditional power adapters above 75 W require a two-stage topology structure to meet the requirements of input power factor and harmonics

which has become a technical bottleneck for further improving their power density. A single-stage high power density power adapter topology was proposed in response to this issue. This topology removes the front-end PFC circuit and input electrolytic capacitor from the traditional power adapter circuit and adds an energy compensation circuit to the flyback converter. Controlling the storage and release of energy in the energy storage capacitor can achieve power factor correction while meeting the output voltage ripple requirements

effectively improving the power density of the power adapter. Based on this

a comprehensive control strategy based on one-cycle control was proposed

and key circuit parameters in the topology were designed. Finally

an 80 W system prototype was built to verify the correctness and feasibility of the proposed solution.

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