5V centralized power supply system!

5V centralized power supply system q(≧▽≦q)
 
 
[If you have any questions or don’t understand about open source, you can send me a private message at any time]
Function introduction:
Input:
[DC female socket] [TYPE-C PD]
Input voltage: 4.5~20V
Recommended input voltage: 6V~18V
 
Output:
[TYPE-A] X8
voltage: 5V
Maximum output current: 5.5A
 
The PD chip uses CH224K
The DC-DC chip uses FR9855 
 
Voltage selection method:
first plug the power supply pin of CH224K to power the chip. Assuming that a 12-volt PD voltage is required, plug the jumper cap into the pin at the 12-volt position, and then insert the TYPE-C line.
 
This project does not require burning the program, just directly hit the board, solder the components, and power it on. It is very quick and easy!ヾ(≧▽≦*)o
 
Notes:
// The value of the C6 capacitor in the PCB can be 5PF-33PF (I used a 20PF capacitor)
 
// The LED uses a 0807 package, with an RGB light with built-in IC, and colorful slow flashing
 
// The two resistors on the bottom layer of the PCB are the current-limiting resistors of the LED. If you don't solder the LED lamp, you don't have to solder it
 
// The matching 3D shell has been drawn and can be printed directly. It can also be seen in the 3D preview of Jialichuang EDA. I have printed it and used it. It fits perfectly without any size or shape errors //
 
// You will see that the plug-in pads in some places on the PCB diagram seem to be short-circuited with other networks, but they are not, because I modified the pads and customized them. Jialichuang EDA shows that this is the case. The actual top pad is very small, and the bottom pad has been enlarged for easy welding. Opening the 3D preview can be more intuitive
 
// ​​There is a window near the TYPE-C 16P pin. If you are not sure about your own welding and are afraid of tin connection, remember to remove the window
 
// The window area is for large current, you can plate thick tin, solder copper wire, or solder silver wire [ㄟ( ▔, ▔ )ㄏ It's up to you]
 
// If you want to use PD power supply, you must use a charger that supports PD
 
// When using the DC female socket input, you can remove the jumper cap of the "deceiving" pin header to disconnect the CH224K from power supply. In fact, you can add an automatic control switch circuit, but I prefer to physically cut off the power
 
// In order to avoid the input voltage of PD deceiving exceeds the maximum voltage that the chip can withstand, causing the chip to become fireworks! So when using PD input, do not leave all 3 pin headers floating!
    [I use the 15V gear or DC mother socket 12V input every day]
(When the CFG1 pin of the CH224K decoy chip is in a floating state, it will request a 20V voltage gear)
 
// The document layer indicates the values ​​of all components and the functions of the pin headers
Update log:
1. Release open source 2023/4/4
2. Update open source pictures, update temperature measurement data 2023/5/17
 
 
Decoy test:
 
9V decoy successful↓↓↓
 
12V decoy successful↓↓↓
 
15V decoy successful↓↓↓
 
20V can also be decoyed, but the DC-DC chip has a recommended withstand voltage of 18V and a maximum withstand voltage of 20V. Once it exceeds this, I am afraid that fireworks will be set off, so I didn’t try the 20V gear
 
temperature detection:
12.5V DC input
TYPE-A interface connected↓↓↓
Lamp tube 1A (Op Lighting)
Lamp tube 1A (Op Lighting)
Fan 0.5A (The maximum gear three was turned on during the test)
RGB luminous mouse pad 0.1A
RGB light board 0.451A (made by myself)
Small flashlight charging (unknown)
 
The multimeter temperature line was left still for 14 minutes and the room temperature was 27℃.
 
Then it was loaded for about 57 minutes and the measured temperature was: 57℃ The multimeter showed that the temperature fluctuated between 56℃ and 57℃
[Due to the small point contact area of ​​the temperature line, the actual temperature of the chip surface will be higher than 57℃, and the temperature inside the chip will be higher]
After taking the picture, I blew the fan directly for about 2 seconds and instantly cooled it to 31℃
The chip thermal shutdown temperature is 160℃
The recommended operating temperature of the chip is -40℃~80℃
 
The temperature line is fixed with tape and pressed on the DC DC chip
 
 
with 3D shell to show
 
welding~ Add
 
solder paste
 
to the components . Soldered
 
~ Self
 
-destructive test:
Children are ignorant and pretend to play ((((
 
 
 
The BOM table directly generated by Jiali Chuang may not be completely correct. It is best to slowly compare the device names and values ​​marked on the schematic diagram and PCB~
The attachment contains the data sheet of FR9855 and CH224K
The attachment also has all the pictures in this open source, which can be downloaded