SW3518S 100W desktop charging station (support protocols: PPS/PD3.0/PD2.0/QC series/AFC/FCP/SCP/PE protocol/SFCP//VOOC)

This full-protocol high-power desktop charging station uses SW3518S as the main control IC.
The cost is only 18 yuan.
BOM table is attached.
 
The input voltage range is 6~36V, and the maximum output power can reach 100W. Built-in USB Type-C interface logic, supports DFP/Source role. Built-in fast charging indicator driver has soft start, input overvoltage protection, input undervoltage protection, output overcurrent protection, output short circuit protection, over-temperature protection and other protection functions. Support CC/CV mode, dual-port independent current limiting, line loss compensation, temperature control and other functions.
 
 Support protocols: Support PPS/PD3.0/PD2.0 Support QC4+/QC4/QC3.0/QC2.0 Support VOOC Support AFC Support FCP Support SCP Support PE2.0/PE1.1 Support SFCP Support
IIC, external screen
 
Design advantages (personal opinion): The rectifier bridge composed of 4 Schottky diodes can be used normally no matter how it is connected (except short circuit) All components are arranged on one side, which is convenient for welding (a must-have for hand-clumsy people) SMD capacitors All resistors are packaged in 0805, which is convenient for welding (a must for clumsy people). IIC interface is reserved, and an external screen can be connected (the register manual can be found in the attachment). There are xt30 and dc2.5 (2.1) interfaces for easy connection. The board is rectangular in shape, which is more aesthetically pleasing (theoretically, it should support 3516h chip, but it has not been tested. Use two solid capacitors, which are better looking and more expensive.
 
This is my first open source project, so there may be some imperfect designs. I hope the experts can answer.
 
 
Attached is the 3518S standard DEMO, register manual and bom table
 
 
 
. A port protocol test:
 
 
 
 
 
•C port protocol test:
 
 
 
 
 
The following is a temperature test chart that ran for about 100 minutes:
 
 
 
 
 
Full load ripple
PS: Aluminum electrolytic capacitors have poor filtering effect, and it is recommended to use solid-state electric dragons. No-
 
 
 
 
load ripple:
None.
 
 
Notes: USBA/USBC output capacitors can be selected as 4.7uF/10uF, and 10uF is recommended (must be welded). When the input voltage is lower than 30V, the input capacitor's withstand voltage must be 35V or above. When the input voltage is higher than 36V, the input capacitor's withstand voltage must be 50V or above. When running at high power, the selection of MOS inductors can refer to the attachment (schematic design guide). If you need to run for a long time at high power, it is recommended to use a half-bridge MOS with a Vgs of 4.5V, a path impedance of less than 10moh, and a Vds of 40V. If you need to run for a long time at high power, it is recommended to select an inductor with a saturation current of 7A. Above, the internal resistance is less than 15mohm. If you need to run a long time with a large current, it is recommended to put two layers of GND inside to speed up the heat dissipation to improve efficiency. The protection temperature can be adjusted by connecting resistors in series and parallel (the high temperature value can be increased by connecting a small resistor in series, and the low temperature value can be lowered by connecting a large resistor in parallel. If the NTC function is not used, the NTC pin is directly grounded) If you use MCU or other external devices, you must take power from VDRV; try not to exceed 20mA to avoid chip efficiency reduction and heat generation. Because 4 diodes are used to prevent reverse connection and chip burning, the diodes will heat up greatly when high power output is required, which greatly reduces efficiency. If you need to output high power for a long time, you can choose to use diodes with lower voltage drop and higher current resistance!