小功率直流稳压电源的组成:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531055811097110918zjc09jcygxyg9d9d.png)
2、小功率整流滤波电路
单相桥式整流电路:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531068555277111125sqt6lusbozuu27vd.png)
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531070278851111142t66tbjjwuyx6tyw0.png)
单相桥式整流电路的主要参数:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531103750002111717vnbl21n010a99tlh.png)
电容滤波电路:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531106049148111740n75bdxz7i9byaghr.png)
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531108396523111803wor4n4jovrni44yi.png)
电容滤波电路的特点:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/17153115165640112516gljm252jucjul2ur.png)
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531154726273112547pgbzbugcabaaixm0.png)
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531156354671112603uewrcyq339yteezr.png)
电容滤波电路的输出电压在负载变化时波动较大,说明它的带负载能力较差。适用于输出电压较高,负载电流较小且负载变动不大的场合。
3、硅稳压管稳压电路
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531166178382112741ifyfwhhryyxh53yh.png)
在电网电压波动或负载电流变化时,将UZ的微小变化转化为IZ较大的变化,经限流电阻R上的压降调节作用,使UO基本稳定。
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531170499565112824wezjs22tybwomwmk.png)
4、串联型直流稳压电路
串联反馈式稳压电路的稳压过程:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531176064843112919shth1bhaoykbzwgh.png)
电压调整范围:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531178580724112945xg151656m6miyznw.png)
5、集成稳压器
将串联稳压电源和保护电路集成在一起就是集成稳压器。
最简单的集成稳压电源只有输入,输出和公共引出端,故称之为三端集成稳压器。
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531195634826113236cy8yyz58wu81lu5o.png)
三端集成稳压器的分类:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531198263618113302q8ms7a0daq8add9s.png)
三端集成稳压器的应用电路:
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531204848356113408ssbm5nn8msu5lmb0.png)
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531206210682113422eauldum7ld1drury.png)
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531218049531113620jk8tgfmmnnwqw4wj.png)
6、开关型稳压电路
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/171531222311049113703xtjwzj6rjhlqfee6.png)
![image.png image.png](https://static.assets-stash.eet-china.com/forum/202405/10/17153122349397113714guuwviw9upi2926i.png)