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Minimal USB Splitter

Overview

The main control of the splitter adopts SL2.1A.

Compared with the demo board, it has less electrolytic capacitors and less 12M crystal oscillator. This reduces the size. Moreover, SOP16 is attached to the back of the USB contact tongue, further reducing the PCB area.

The idea was seen on an open source platform, but he didn't do equal-length wiring. So I rewired it.

By placing the chip on the back of the USB, the USB port can be used normally without raising the height. The board thickness is 0.8mm.

Finished product pictures:

[Insulation treatment should be done during actual use to prevent short circuit]

U disk speed test results, every port was tested, and the results were not in vain after waiting for a long time.

TIM screenshot 20200803114715.png

There is a slight problem with the stability of this IC, and the disk will occasionally drop.

Design Files

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Update:2025-08-09 03:09:32

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