电源电路设计报告

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1、电源电路设计报告摘要当今社会人们极大的享受着电子设备带来的便利，但是任何电子设备都有一个共同的电路——电源电路。大到超级计算机、小到袖珍计算器，所有的电子设备都必须在电源电路的支持下才能正常工作，当然这些电源电路的样式、复杂程度千差万别。超级计算机的电源电路本身就是一套复杂的电源系统，通过这套电源系统，超级计算机各部分都能够得到持续稳定、符合各种复杂规范的电源供应。袖珍计算器则是简单多的电池电源电路，不过你可不要小看了这个电池电源电路，比较新型的电路完全具备电池能量提醒、掉电保护等高级功能。可以说电源电路是一切电子设备的基础，没有电源电路就不会有

2、如此种类繁多的电子设备，我们的生活也就不会这么丰富多彩了。由于电子技术的特性，电子设备对电源电路的要求就是能够提供持续稳定、满足负载要求的电能，而且通常情况下都要求提供稳定的可调直流电能。提供这种稳定的直流电能的电源就是直流稳压电源，直流稳压电源在电源技术中占有十分重要的地位。关键词：可调直流稳压源目录摘要···························································I一、总体方案与设计···············································31.1方案

3、比较与选择·············································31.11直流稳压电源设计确定···································31.2系统总体方案描述···········································4二、理论分析与参数计算·········································42.1集成三端稳压器···········································42.2电源变压器·····

4、···········································52.3整流二极管及滤波电容······································52.4保护管VD1,VD2············································5三、电路分析与设计·············································63.1降压电路·················································63.2整流电路···

5、··············································73.3滤波电路·················································83.4稳压电路·················································10四、系统测试···················································114.1测试方法与仪器··········································114

6、.2测试结果分析············································11五、结论·······················································11六、参考资料···················································11七、附录·······················································12一、总体方案与设计1.1方案比较与选择1.11直流稳压电源设计确定（1）晶体管串联

7、式直流稳压电路电路框图如图1所示，该电路中输出电压Uo经取样电路取样后得到取样电压，取样电压与基准电压进行比较得到误差电压，该误差电压对调整管的工作状态进行调整，从而使输出电压发生变化，该变化与由于供电电压Ui发生变化引起的输出电压的变化正好相反，从而保证输出电压Uo为恒定值(稳压值)。因输出电压要求从1.25V起实现连续可调，因此要在基准电压处设计辅助电源，用于控制输出电压能够从1.25V开始调节。（2）采用三端集成稳压器电路电路框图如图2所示，采用输出电压可调且内部有过载保护的三端集成稳压器，输出电压调整范围较宽，可实现输出电压从1.25V起

8、连续可调，因要求电路具有很强的带负载能力，需设计一软启动电路以适应所带负载的启动性能。该电路所用器件较少，成本低且组装方便、可靠性高。可