摘要
文章先对影响电流型DC-DC升压转换器电路的系统稳定性的因素进行分析,然后在电路设计实现上提出了具体的改进办法:在误差放大器模块增加频率补偿电路来消除放大器反馈环路可能存在的振荡现象;采用斜坡补偿电路来增强反馈电流环路的稳定;为了提高电压反馈环路的稳定性,创新提出在芯片外部增加COMP管脚,内部增加环路补偿电路;输入管脚增加旁路电容以减少噪声;输出管脚增加旁路电容以增强芯片反馈系统的稳定性;通过采取这些措施,保证了芯片电路的的稳定性能,并极大的提高了输出电压的精度,设计取得了很大成功。
Based on the analysis of the principle of current type PWM DC-DC Boost convener and the factors which cause the circuit unstable, several methods have been developed to improve the circuit stability： miller compensation, slope compensation and loop compensation circuit as well as output bypass capacitor and Input bypass capacitor have been added for loop circuit stability. The whole DC-DC boost converter Hspice simulation result shows the output voltage has a high accuracy.
出处
《微电子学与计算机》
CSCD
北大核心
2006年第6期229-232,共4页
Microelectronics & Computer
