Four-way 166W smart charger

Introduction: A high-power, low-cost IoT desktop charger/car charger

1. Product Introduction

This product is a charger with two TypeC interfaces and two TypeA interfaces. The C port and the A port are independent of each other and do not interfere with each other. Single C The maximum power of the port is 65W, the maximum power of the single A port is 18W, and the total power is 166W (65W+65W+18W+18W). It is assembled using a male aluminum casing, which has good heat dissipation effect and has networking function, which can realize remote control and Firmware OTA update.


2. The application scenario

is suitable for use in fixed scenarios such as homes, schools and companies, and is also suitable for car and mobile scenarios to charge mobile devices (mobile phones, tablets, etc.).


3. Product Overview

The project control core uses the Espressif ESP32C3 chip as the control MCU, which has Wifi and Bluetooth. It is cheap and powerful, and can be used for secondary development to add specific functions later.
The C-port power stage uses the power chip of Zhilong SW3526, which has multiple built-in fast charging protocols. The integrated power tube inside the chip can reduce the PCB area. The maximum power is 65W in a single channel. Two channels are designed in this project.
The A port power stage uses Yingjixin's IP6525T. This chip has built-in multiple fast charging protocols and is low-priced. The maximum power is 18W in a single channel. Two channels are designed in this project.
The interface display uses a 0.96-inch OLED display, which has high contrast, low power consumption, and high cost performance.
The input part is designed with a protection circuit and has the function of preventing reverse connection (convenient for car charging applications). The reverse connection system will not work. Equipped with overcurrent protection circuit (10A), overcurrent will blow the fuse. Equipped with anti-sparking slow-start circuit to prevent electric sparks.
The onboard four-way RGB indicator lights and panel can quickly indicate the current system status.
The onboard acceleration sensor can realize functions such as vibration control.
For related components (upper board, front and rear panels), please move to the attachment to download ->>>>

4. Product parameters

Input voltage: 10V-32V DC

input power: > 80W

Fast charging parameters are as follows:

C port output protocol: PPS/PD3.0/ PD2.0/QC4+/QC4/QC3.0/QC2.0/AFC/FCP/SCP/PE2.0/PE1.1/SFCP/BC2.1/Apple/Samsung
C port output voltage: 0.3-22V
C port output Current: 0-3.3A
Port A output protocol: DCP/QC2.0/QC3.0/FCP/AFC
Port A output voltage: 0.3-12V Port
A output current: 0-3A

PCB parameters: 47*80(mm) Thickness 1.6mm overall size of four-layer board

(including shell): 50X20X80 (mm)

5. Instructions/Tutorials:

This product has been welded. After testing that there is no short circuit and virtual soldering, it can be connected to the computer through the download port USB, and it can be used after burning the program.

Note:

Please pay attention to the heat dissipation of the power stage part when installing. It is recommended to place a heat conductive sheet on the back of the power stage part to enhance the heat dissipation capability.
It is recommended to use steel mesh welding for welding. The devices in this project are all arranged on one side, which can quickly realize low-cost reflow soldering.
When powering on for the first time, it is recommended to use a 5V power supply. Only after measuring that the RY8411 output is normal at 3.3V can the voltage be increased for subsequent tests.
The C1 port is onboard, and the C2 port is led out from the upper board through pin headers.
The firmware of ESP32 is still being improved, and the basic functions have been implemented


. 6. Note:

This module is software + hardware, and the attachment contains the bin file.
Directly burn bin files through esp-download-tools, no debugger is required. The chip has a built-in debugger + virtual serial port. You can directly burn after connecting to the computer via USB.
The cost of this project is about 50 yuan.
Notes on hardware assembly:

The upper board is a double-layer board (1.6mm). The main function is to realize the output of the C2 port on the upper layer and the toggle switch and LED.
The finished product picture on the home page does not have a cover for display purposes. The accessory documentation can be found when purchasing the aluminum casing.
It is recommended to use solid capacitors for the C port output capacitors (C1, C44), size 8X10, capacity 220uF, withstand voltage 35V, which can reduce ripple.
The size of the A port output and input capacitors (C21, C60) should not be larger than 8X10, and the remaining capacitors can be 8X12 for easy assembly.
Pay attention to the position of the inductor when assembling it. If the error is too large, it may not be aligned with the upper board.

5. The program is developed using ESP-IDF, and only bin files are provided. New functions will be updated later by updating the bin or reserved OTA. This document will be edited again when new instructions are added later.

6. The unmounted devices have been deleted from the BOM list (R9, R19, C53, C63, H1)