[Training Camp_Basic Class] Boost adjustable power supply design based on LM2577

[Introduction] This project is a boost-type adjustable power module based on the LM2577S chip
[Main function] Input +5V voltage, the output voltage is adjusted by the potentiometer, the output voltage range is 5V-32V, and has a certain load capacity (theoretical 6A, The actual value may be about 1-2A) and has a working indicator light function.
[Implementation process] The PCB size is 4.5cmx3.8cm. Refer to the LM2577S data manual to build the peripheral circuit of the chip. The input and output terminals are connected with polarized and non-polar capacitors to filter out low-frequency and high-frequency noise respectively, and act as energy storage to make the output voltage ripple The waves are smaller. The input and output are electrically connected through the wiring terminals. The feedback terminal of the chip detects the voltage signal. The internal reference voltage is 1.23V. Therefore, the adjustable output voltage calculation formula is Vout=(1+R3/R2)*1.23, so the maximum output voltage is 32V ( Theoretical calculation value), the output minimum voltage is 1.23V (theoretical value).
[Note] Since LM2577 is a boost IC, the buck output can easily damage the circuit, so the output should be higher than the input voltage as much as possible. Output voltage range 5-32V.
[Experience] Designing a boost module from scratch is not as easy as imagined. There are many things that need to be paid attention to during this period, such as device selection, component layout as concentrated as possible, flowing current size and wiring width, etc. It made me review the basic circuit knowledge again, and it felt great. Lichuang EDA is very good, and it is a one-stop solution. When designing PCB, we don’t need to pay too much attention to device packaging and selection. Developers have more energy to focus on circuit design and PCB drawing, followed by Chinese interfaces and domestic software, as well as rich open source platforms, allowing everyone to participate in learning and development involuntarily. I think this is compared to domestic software. The good thing is that I also hope that Lichuang will get better and better, and the open source ecosystem will get better and better! ! !