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

doi:10.3969/j.issn.0372-2112.2017.02.033

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

更新时间：2025-07-16

- Design of Error Amplifier with Multi-functions for Peak-Current Mode DC-DC Converters
- Acta Electronica Sinica Vol. 45, Issue 2, Pages: 508-512(2017)
- 作者机构：
  
  华侨大学信息科学与工程学院,福建,厦门,361021
- 作者简介：
- 基金信息：
  
  Key Program of Science and Technology Program of Fujian Province (No.2013H0029);Quanzhou Science and Technology Project (No.2013Z33)
- DOI：10.3969/j.issn.0372-2112.2017.02.033
  CLC： TN432
- Published Online：25 February 2017，
  
  Published：2017
- 稿件说明：
移动端阅览
YANG Xiao, LOU Fu-jun, XU Jin-li, et al. Design of Error Amplifier with Multi-functions for Peak-Current Mode DC-DC Converters[J]. Acta Electronica Sinica, 2017, 45(2): 508-512.
DOI：

YANG Xiao, LOU Fu-jun, XU Jin-li, et al. Design of Error Amplifier with Multi-functions for Peak-Current Mode DC-DC Converters[J]. Acta Electronica Sinica, 2017, 45(2): 508-512. DOI： 10.3969/j.issn.0372-2112.2017.02.033.

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 0.5m 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4.48A，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.

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 m BCD process.Simulation results show that the static current consumption of the error amplifier is 4.48 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.

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