同步整流DC/DC升压芯片中驱动电路的设计  

Driver Circuit Design for Synchronous Step-up DC/DC Converter

作　　者：程帅[1] 邹雪城[1] 陈卫洁[1] 邓敏[1] 

机构地区：[1]华中科技大学电子科学与技术系,武汉430074

出　　处：《计算机与数字工程》2007年第3期164-166,共3页Computer & Digital Engineering

摘　　要：在DC/DC转换芯片中,为了保证功率开关管及时导通和截止,需要设计专门的驱动电路。本文设计了同步整流驱动电路,通过引入负跳沿延时单元,消除了CMOS瞬态短路导通现象,降低了功耗,保护了输出级。HSPICE仿真表明,驱动电路延时小于14ns,能满足较高开关频率的要求;同时,开关转换时的尖峰电流减小了56%,功耗也降低了19.3%。The main design issues such as propagation delay and power dissipation have been addressed for the gate-driver of DC/DC switching regulator and a gate-driver for the synchronous rectifier. MOSFET is then proposed in this paper, in which an improved circuit not only reducing the power dissipation, but also protecting output stage is given. The result of simulation using HSPICE shows that the improved circuit has less than 14ns propagation delay, reduces 56% peak current, and saves 19.3% power as well.

关 键 词：驱动电路 同步整流 直流/直流 衬底控制 

分 类 号：TN431[电子电信—微电子学与固体电子学]