文档介绍：湖北理工学院课程设计报告摘要本次电力电子装置设计与制作,利用 BUCK 型转换器来实现 16V-8V 的开关直流降压电源的设计。使用 TL494 作为控制芯片输出脉冲信号从而控制 MOS 管的开通与关断。为了将 MOS 管G极和 S极隔离,本设计采用了推挽式放大电路。另外本设计还加入了反馈环节,利用芯片自身的基准电压与反馈信号进行比较来调节输出脉冲的占空比,进而调整主电路的输出电压维持在一个稳定的电压状态。关键词: DC/DC ;开关电源; Buck 电路; TL494 Abstract This Power electronic equipment design is used by BUCK to catch the goal of 16V-8VSwitch dc step-down power supply design. Use TL494 as control chip output pulse signal to control the opening of MOS tube and shut off. In order to make the MOS tube G pole and S pole separate, this design uses a push-pull amplifier circuit. In addition, the design also joined the feedback link to make the circuit more accurate and stable . Key word : BUCK type converter, Step-down power, TL494 湖北理工学院课程设计报告目录一方案论证与选择............................................................................................................... 1 基本要求............................................................................................................................... 1 方案设计............................................................................................................................... 1 二 BUCK 电路总原理图和工作原理.......................................................................... 2 系统总体框图及电路原理图.............................................................................................. 2 BUCK 主电路原理图及工作原理..................................................................................... 3 控制电路图与工作原理....................................................................................................... 3 三主要器件的原理和电路参数的设计.................................................................... 4 电源管理芯片 TL494 .......................................................................................................... 4 TL494 芯片主要特征........................................................................................... 4 TL494 工作原理简述..................................................................................