一种新颖的PWM开关电源控制技术  

Novel PWM Switching Power Supply Control Technique

作　　者：王松林[1] 吕亚兰[1] 李演明[1] 来新泉[1] 叶强[1] 

机构地区：[1]西安电子科技大学电路CAD研究所,西安710071

出　　处：《电子器件》2008年第4期1310-1314,共5页Chinese Journal of Electron Devices

基　　金：国家自然科学基金资助项目(60172004);西安应用材料创新基金资助项目(XA-AM-200504)

摘　　要：提出了一种新颖的脉宽调制(PWM)控制技术,该技术将误差放大器和PWM比较器归结为一个求和比较器来实现对电流模开关稳压器的自适应控制,使系统变得简洁,降低了成本,有利于集成。成功将该求和比较器应用于一款典型输入为5V典型输出为15V的升压型开关稳压器中,且稳压器采用低损耗的电流检测网络对峰值电流进行采样,减小了功耗。采用0.6μm30V Bi CMOS工艺,经Hspice仿真验证,结果表明稳压器的输出电压纹波在±7mV之间摆动,输出电压精度为±1.5%。A novel PWM control technique is presented, which integrates the error amplifier and PWM comparator with a summing comparator to achieve the self-adaptive control of the current mode switching regulator. And this technique makes the system brief and lowers the cost, so it is easy to be integrated. The summing comparator has been used in a Boost switching regulator of 5 V voltage typical input and 15 V voltage typical output successfully. Besides, by using lossless current sensing network to sample the peak current, the regulator reduces the power dissipation. Based on 0. 6 μm 30 V Bi CMOS process, Hspice simulation results prove that the output voltage ripple has a range of ±7 mV, and the precision of output voltage has a range of ±1.5%.

关 键 词：开关稳压器 求和比较器 PWM 电流模 

分 类 号：TN432[电子电信—微电子学与固体电子学]