Basic knowledge of power supply that you must know

Aguilera

Basic knowledge of power supply that you must know [Copy link]

For every circuit designer, power supply is basically a problem that will be encountered 100%, especially in designs that are mainly embedded. For many weak current designers, the knowledge of power electronics is very lacking. Of course, when designing hardware, they will encounter various problems. The problem of power supply is also extensive and profound. Commonly used switching power supplies have the following topologies: (see the attached picture)
1. Buck
2. Boost
3. Buck/boost
4. Flyback
5. Full-bridge
6. Half-bridge
7. Half-forward
8. Push-pull
The following aspects need to be considered in power supply design:

1) Whether the input and output are isolated. For power supplies without isolation, when there is a problem with the switch (short circuit or open circuit), the input voltage will be directly connected to the output, causing damage to the subsequent circuit. For example, buck, boost, buck/boost, etc.

2) The voltage on the inductor or transformer

3) The peak current flowing through the inductor, diode and switch

4) Whether multiple voltage values are required for output

5) How much is the peak voltage on the capacitor? For

specific figures and example analysis, please see the attached.

电源必备基础知识（附图 实例解析）.pdf (318.28 KB, downloads: 3)

2019-12-19 21:35 上传

点击文件名下载附件

RichSJ

According to the title, it seems that LDO should be added. If efficiency is not considered, LDO is simpler and suitable for beginners.