模拟集成电路设计new

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1、开关稳压电源设计说明书课题：开关稳压电源的设计姓名：指导老师：易立华院别：物电学院班级：电子09-1BF学号：14092500105湖南理工学院物电学院10目录一、引言····································································2二、设计课题·······························································2三、设计任务·····························

2、··································2四、设计要求·······························································2五、开关稳压电源的设计基础······································31、开关稳压电源的概念················································32、开关稳压电源的工作原理····························

3、················3103、开关稳压电源的优点·················································44、开关稳压电源的分类·················································5六、电路设计与原理分析············································61、电路原理图设计····················································

4、·62、原理分析······························································7七、设计注意事项·······················································8八、设计总结······························································8九、参考文献················································

5、··············810一、引言随着电力电子技术的发展，电力电子设备与人们的工作、生活的关系日益密切。而电子设备都离不开可靠的电源，进入80年代计算机电源全面实现了开关电源化，率先完成计算机的电源换代，进入90年代开关电源相继进入各种电子、电器设备领域，程控交换机、通讯、电子检测设备电源、控制设备电源等都已广泛的使用了开关电源，更促进了开关电源技术的迅速发展。开关电源是利用现代电力电子技术，控制开关晶体管开通和关闭的时间比率，维持稳定输出电压的一种电源，开关电源一般由脉冲电压调制（PWM）控制TC和M

6、OSFET构成。开关电源和线性电源相比，其具有功耗小，效率高、体积小、重量轻、稳压范围宽、使用方便等优点。二、设计课题设计一手机开关型电池充电器三、设计任务1.开关电源型充电；2.输入电压220V，输出直流电压自定；3.恒流恒压；4．最大输出电流为:Imax＝1.0A;10四、设计要求1.合理选择开关器件；2.完成全电路理论设计、绘制电路图；3.撰写设计报告。五、开关稳压电源的设计基础1、开关电源的概念根据调整管的工作状态，我们常把直流稳压电源分成两类：线性稳压电源和开关稳压电源。开关电源是一种比较新型的电源。

7、开关稳压电源(以下简称开关电源)问世后，在很多领域逐步取代了线性稳压电源和晶闸管相控电源。早期出现的是串联型开关电源，其主电路拓扑与线性电源相仿，但功率晶体管工作于开关状态。随着脉宽调制(PWM)技术的发展，PWM开关电源问世，它的特点是用20kHz的载波进行脉冲宽度调制，电源的效率可达65%~70%，而线性电源的效率只有30％~40％。因此，用工作频率为20kHz的PWM开关电源替代线性电源，可大幅度节约能源，从而引起了人们的广泛关注，在电源技术发展史上被誉为20kHz革命。随着超大规模集成(ultra-la

8、rge-scale-integrated-ULSI)芯片尺寸的不断减小，电源的尺寸与微处理器相比要大得多；而航天、潜艇、军用开关电源以及用电池的便携式电子设备(如手提计算机、移动电话等)更需要小型化、轻量化的电源。因此，对开关电源提出了小型轻量要求，包括磁性元件和电容的体积重量也要小。此外，还要求开关电源效率要更高，性能更好，可靠性更高等。这一切高新要求便促进了开关电源的不断发展和进步