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.
出处
《微电子学》
CAS
CSCD
北大核心
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)
关键词
DC-DC升压变换器
次谐波振荡
脉宽调制
开关噪声
DC-DC boost converter
Subharmonic oscillation
Pulse width modulation
Switching noise
