摘要
本文分析了同步整流式开关电源与普通开关电源相比在转换效率方面的优势 ,提出了一种同步整流式脉宽调制 (PWM)芯片的结构 ,它集成了开关电源的控制、输出调整、输出监控和保护等功能 ,具有高效率、高精度、可编程、瞬态响应快和过冲小等特点 对芯片各单元电路和整个电源系统进行了和HSPICE模拟 ,并采用 1 7μmBiCMOS工艺成功制作出该芯片 以它为核心建立了一个适用于PenitumⅡ系列计算机主板的同步整流式开关电源系统 ,测试结果表明各项指标完全符号Intel公司专为PentiumⅡ系列CPU电源制定的VRM8 2标准。
The advantages of synchronous rectifying switching regulator are analyzed as compared to conventional switching regulator in the field of conversion efficiency.An architecture of synchronous rectifying PWM chip is proposed,which integrates the control,output adjustment,output monitoring and protection function of switching regulator.It is characterized by high efficiency,high precision,programmability,fast transient response and small start up overshoot.HSPICE simulations are done on each cell and the whole system,and the chip is successfully fabricated with 1 7μm BiCMOS process.A synchronous rectifying switching regulator is constructed for Pentium Ⅱ serial computer mainboards.The test results show the performance of this system conforms to VRM8 2 rule,which is established by Intel Corp.for Pentium Ⅱ CPU power supply specifically.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2000年第12期64-68,共5页
Acta Electronica Sinica
基金
国家"九五"科技攻关项目!(No .97 760 0 2 )
关键词
同步整流
脉宽调制
开关电源
VLSI
芯片
synchronous rectification
pulse width modulation
switching regulator
VLSI