基于采样仿真电流斜坡的Buck变换器设计  

Design of Buck Converter Based on Sampling Simulation Current Ramp

作　　者：杨雨豪 周庆 曹宝安 符祝辉 李雯君 

机构地区：[1]西安科技大学通信与信息工程学院,陕西西安710600 [2]西安科技大学电气与控制工程学院,陕西西安710600

出　　处：《通信电源技术》2017年第5期69-70,共2页Telecom Power Technology

摘　　要：为了使Buck变换器能够具备电流型控制的优点,基于采样仿真电流斜坡的集成控制芯片,设计了一个低电压大电流输出的Buck变换器。该系统采用外置误差放大器和三极管组成的控制电路,可以更加灵活地用MCU调节输出电压。输出级的LC滤波器大大降低了纹波电压。电路仿真验证了该设计的正确性,并已制作出了5 V、5 A输出的产品。In order to make the buck converter have the advantage of current mode control,a buck converter with low voltage and high current output was designed based on the sampling simulation current ramp integrated control chip. The system adopted an external error amplifier and a triode control circuit,which can flexibly adjust the output voltage with MCU. The output stage of the LC filter greatly reduced ripple voltage. The circuit simulation verified the correctness of the design,and had produced 5 V and 5 A output products.

关 键 词：仿真峰值电流模式控制 BUCK变换器 大电流 输出电压可调 

分 类 号：TM46[电气工程—电器]