USB hub with seven output ports, 5V 3.5A.

Video Link:
Bilibili Video -- Function Demonstration and
Project Introduction
This product uses the CX8823 as the power supply chip for 5V 3.5A output, and a DC 5.5/2.1mm headphone jack for power input, compatible with both 5.5/2.5mm and headphone jacks. The input voltage range is 7-30V, offering excellent compatibility. It uses the domestically produced industrial-grade CH338F as the main control chip, expanding to seven ports for transmission. It uses the CH213K for upstream USB current reverse protection, and each downstream USB port is equipped with a self-resetting fuse to prevent short circuits.
The project
can support seven devices simultaneously and output a total of 5V 3.5A, sufficient to power most everyday devices.
Project Parameters:

USB 2.0 480MHz,
seven ports simultaneously output 5V 0.5A, single port output 5V 1.0A.
Applicable temperature range: -20°C to 55°C.

Principle Analysis:

Input Power Supply Design,
CH338HUB Main Control Design,
CH338 Power Supply Design ,
USB Anti-static Design, USB Backflow Prevention
Design,
USB Overcurrent Protection Design.

Acrylic casing. Connection is simple, but do not install backwards.
For full power output, a 24W or higher power adapter is recommended.

Actual Product Images
: Figure 1: Acrylic casing;
Figure 2: Aluminum alloy casing.
Functional Test Diagrams:
Figure 1: 30V input, 5V 1.5A output;
Figure 2: 30V input, 5V 1.0A output;
Figure 3: 30V input, 5V 0.5A output;
Figure 4: Complete Equipment Set.