电子学报 ›› 2017, Vol. 45 ›› Issue (2): 508-512.DOI: 10.3969/j.issn.0372-2112.2017.02.033

• 科研通信 • 上一篇    下一篇

峰值电流模DC-DC转换器中多功能误差放大器电路设计

杨骁, 娄付军, 徐锦里, 李靖坤, 邱伟彬   

  1. 华侨大学信息科学与工程学院, 福建厦门 361021
  • 收稿日期:2015-10-08 修回日期:2016-07-23 出版日期:2017-02-25
    • 作者简介:
    • 杨骁,男,1978年1月出生,湖南邵东人,讲师,硕士导师,2001年,2004年在西安科技大学分别获得工学学士和工学硕士学位,2009年在西安交通大学获得工学博士学位.现为华侨大学信息科学与工程学院讲师,主要从事模拟/RF集成电路设计等方面的研究工作.E-mail:xiaooyanghqu@hqu.edu.cn;娄付军,男,1989年4月出生,河南平顶山人,2014年毕业于华侨大学信息科学与工程学院并获工学学士学位,现为华侨大学信息科学与工程学院硕士研究生,从事高效率电源芯片设计方面的研究工作.
    • 基金资助:
    • 福建省科技计划重点项目 (No.2013H0029); 泉州市科技计划 (No.2013Z33)

Design of Error Amplifier with Multi-functions for Peak-Current Mode DC-DC Converters

YANG Xiao, LOU Fu-jun, XU Jin-li, LI Jing-kun, QIU Wei-bin   

  1. College of Information Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China
  • Received:2015-10-08 Revised:2016-07-23 Online:2017-02-25 Published:2017-02-25
    • Supported by:
    • Key Program of Science and Technology Program of Fujian Province (No.2013H0029); Quanzhou Science and Technology Project (No.2013Z33)

摘要:

提出了一种适合于峰值电流模DC-DC转换器的新型多功能误差放大器电路.与斜坡电压信号结合可实现软启动功能,实现了从启动阶段到稳定工作状态的平滑过渡,无扰动出现,并有效地消除了启动阶段的浪涌电流和电压过冲;同时还具有最大电流限制和模式切换功能.该误差放大器集成到一款峰值电流模升压型DC-DC转换器中,电路采用CSMC 0.5μm BCD工艺实现.仿真结果表明:3.5V的输入电压下,误差放大器消耗的静态电流为4.48μA,并且能够实现软启动、最大电流限制、模式切换功能.电路具有简单易实现,功耗低的特点.

关键词: 误差放大器, DC-DC转换器, 电流模, 软启动, 低功耗

Abstract:

A novel error amplifier with integration of multi-functions for peak-current mode DC-DC converters is presented.Soft-start is achieved by the error amplifier combined with a ramp voltage signal.A smooth transition from start-mode to the steady state is achieved without disturbance,and the inrush current and the overshoot of the output voltage during start-up are eliminated effectively.Moreover,this novel error amplifier has other two functions,which are the maximum current limit and working mode switching.The error amplifier is applied to a peak-current mode BOOST DC-DC converter that is implemented with CSMC 0.5 μ m BCD process.Simulation results show that the static current consumption of the error amplifier is 4.48 μ A with 3.5V supply voltage,and the soft-start,maximum current limit and working mode switching functions are achieved by the multi-functions error amplifier.The presented circuit is concise and simple to implement,and has features of low power.

Key words: error amplifier, DC-DC converter, current mode, soft-start, low power

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