一种高性能DC-DC升压变换器的设计  

Design of a High Performance DC-DC Boost Converter

作　　者：余华[1] 邹雪城[1] 陈朝阳[1] 

机构地区：[1]华中科技大学,湖北武汉430074

出　　处：《微电子学》2006年第4期514-517,共4页Microelectronics

基　　金：国家自然科学基金资助项目(90207020)

摘　　要：设计了一种内部集成控制电路和DMOS功率开关管的单片集成电流型PWM升压变换器。该芯片的开关频率为1．6MHz，采用1．5μmBCD工艺实现，具有很宽的输入电压范围（2．7～14V）、高转换效率（负载电流1～500mA）。给出了芯片设计方法、思路及主要单元电路模块，如振荡器、输入比较、PWM比较及过温保护电路，的设计方案，总结了该芯片设计中应注意的次谐波振荡和开关噪声问题。仿真及实验测试结果充分验证了芯片的各项性能。A monolithic current-mode DC-DC boost converter with integrated DMOS FET power switch and control circuit was presented. The chip operating at a fixed frequency of 1.6 MHz, which was designed for wide input voltage range （from 2.7 V to 14 V） and high efficiency over large load range （1 mA to 500 mA）, was fabricated with a 1.5/μm BCD process. Design methodsand schematics of major circuit blocks such as oscillator, input comparator, PWM comparator and over-temperature protection circuits were discussed. Precautions to deal with subharmonic oscillation and switching noise problem in monolithic switching power IC was proposed. Experimental results validated good functionality of the chip.

关 键 词：DC-DC升压变换器 次谐波振荡 脉宽调制 开关噪声 

分 类 号：TN432[电子电信—微电子学与固体电子学]