一种峰值电流控制模式的大功率DC-DC转换器芯片设计

doi:10.3969/j.issn.1001-2400.2011.02.024

J4 ›› 2011, Vol. 38 ›› Issue (2): 135-140.doi: 10.3969/j.issn.1001-2400.2011.02.024

一种峰值电流控制模式的大功率DC-DC转换器芯片设计

刘帘曦^1,2;杨银堂^1,2;朱樟明^1,2

(1. 西安电子科技大学微电子学院，陕西西安 710071;
2. 西安电子科技大学宽禁带半导体材料与器件教育部重点实验室，陕西西安 710071)

收稿日期:2010-09-07 修回日期:2010-10-14 出版日期:2011-04-20 发布日期:2011-05-26
通讯作者: 刘帘曦
作者简介:刘帘曦(1979-)，副教授，博士，E-mail: lxliu@mail.xidian.edu.cn．
基金资助:
国家自然科学基金资助项目(61006028,60676009,60725415);国家重大科技专项基金资助项目(2009ZX01034-002-001-005);AM基金资助项目(XA-AM-201010)

Design of a high output power step down DC/DC converter with the peak current control mode

LIU Lianxi^1,2;YANG Yintang^1,2;ZHU Zhangming^1,2

(1. School of Microelectronic, Xidian Univ., Xi'an 710071， China;
2. Ministry of Education Key Lab. of Wide Band-Gap Semiconductor Materials and Devices, Xidian Univ., Xi'an 710071， China)

Received:2010-09-07 Revised:2010-10-14 Online:2011-04-20 Published:2011-05-26
Contact: LIU Lianxi

摘要/Abstract

摘要：

基于CSMC 0.5μm BCD(Bipolar-CMOS-DMOS)工艺设计了一种降压型大功率DC/DC转换器电路．采用峰值电流控制的电流模技术和斜坡补偿技术，有效提高了转换器的瞬态响应速度和系统环路稳定性．芯片内部集成了导通电阻小于0.18Ω的功率MOSFET，可输出大于3.0A的连续电流．仿真和测试结果表明，在输入电压为4.7V至24V的条件下，芯片内部振荡频率为400kHz，输出功率可达10W，平均转换效率可达85%以上．整个芯片面积小于1.6mm×1.3mm，可广泛用于分布式电源系统中．

关键词: BCD工艺, 降压型, 峰值电流控制, 瞬态响应

Abstract:

This paper presents a high output-power step-down DC/DC converter based on the CSMC 0.5μm BCD (Bipolar-CMOS-DMOS) process. This chip provides a fast transient response and eases loop stabilization by using the current mode operation with the peak-current-control and slope compensation scheme. A power MOSFET with the conduct-resistor less than 0.18Ω is integrated in the chip, and it can provide an over 3.0A continuous output current. Simulation results and measurement show that the oscillating frequency is 400kHz, that the output power is more than 10W, and that the average efficiency is up to 85% over a wide supply range from 4.7V to 24V. The die area is less than 1.6mm×1.3mm, and the chip can be widely used in various distributed power systems.

Key words: BCD process, step-down, peak current control, transient response

中图分类号:

TN402

刘帘曦;杨银堂;朱樟明. 一种峰值电流控制模式的大功率DC-DC转换器芯片设计[J]. J4, 2011, 38(2): 135-140.

LIU Lianxi;YANG Yintang;ZHU Zhangming. Design of a high output power step down DC/DC converter with the peak current control mode[J]. J4, 2011, 38(2): 135-140.

一种峰值电流控制模式的大功率DC-DC转换器芯片设计

Design of a high output power step down DC/DC converter with the peak current control mode

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