一种用于DC-DC转换器的误差放大器  

A Novel Error-Amplifier for DC-DC Converter

作　　者：邹连英[1] 郑朝霞[2] 肖靖帆[2] 

机构地区：[1]武汉工程大学电气信息学院,武汉430074 [2]华中科技大学电子科学与技术系,武汉430074

出　　处：《舰船电子工程》2009年第3期179-182,共4页Ship Electronic Engineering

摘　　要：基于一种适用于DC-DC转换器的误差放大器，提出DC-DC转换器的系统补偿方案。应用此电路设计的芯片在XFAB公司的0．6μm CMOS工艺上实现，仿真结果表明：在2．45-16V电源电压下，该误差放大器的精度〈2mV，未带载时传输延时为95ns，具有高精度和高速的性能。在几种典型应用下，DC-DC转换器系统相位裕度大于46．1°，具有良好的稳定性。A novel error-amplifier is presented, which is used in DC-DC converter. Based on the error-amplifier, a system compensation method is introduced. This error-amplifier circuit has implemented with XFAB 0. 6μm CMOS process. According to the simulation result, the power consumption is 1.2-2mW at 2.5-5V power supply, and the gain error is less than 2mV, the transmission delay with no fan-out is 95ns. This error-amplifier is stable in typical application, its phase margin is more than 46. 1°.

关 键 词：误差放大器 DC-DC转换器 系统补偿 

分 类 号：TN492[电子电信—微电子学与固体电子学]