[Schrödinger’s Rabbit Paper] Flyback boost module based on SX1308

! ! ! Warm reminder: Since this PCB prioritizes aesthetics, the spacing between high and low voltages during wiring may not comply with safety regulations. Please "eat with caution and avoid burning your mouth" when copying homework. ! ! !
 
I have the following three major purposes in drawing PCB:
1. [Cuteness is too big]: It means that the size of the PCB should be as small as possible
2. [Obsessive-compulsive disorder friendly]: Align and align! If not aligned, you will die!
3. [The stubbornness of 0805]: I am blind and only solder devices above 0805 (
the design goal is to make a smaller flyback boost module.
Use a boost chip with a flyback topology.
The boost IC is a master Core Technology's SX1308.
The link to Lichuang Mall is https://item.szlcsc.com/79296.html
, where R3 and R2 are feedback resistors. The output voltage calculation method is Vout=(R3/R2+1)*0.6V.
Transformer You can search for keywords such as "EE5.0 1:10 flash transformer" on a certain website. Pay attention to the packaging. The pins are inward, not outward. For
the PCB project file, please see the attached
 
circuit diagram preview.
 
PCB layout.
 
PCB front and back 3D preview of
 
the final product. Attached to
 
the actual test
 
:
1. In the actual PCB picture, there is a tin connection on pin 4.5.6 of the boost IC. This is because the first version of the circuit was drawn incorrectly and the tin connection was used as a flying wire. In fact, it has been fixed in the uploaded project file. This bug.
2. The boost IC can be seamlessly replaced by Shouding Semiconductor's SDB628 and Xi'an Aerospace Minxin's MT3608. The remaining ICs are not sure.