兰博

USB HUB

Overview

Based on the SL2.1A chip USB 2.0 HUB, it can support 1 to 4 ports. It especially supports the TYPE-C and Micro USB interface data lines. It has enhanced overvoltage and short circuit protection. The two main interfaces can only be used for one at the same time and the other can only be used for power supply. Because I added SM712 ESD protection to the two differential data lines, but the result was that they didn't work. I thought it was due to the wiring, so I redrawed one and added SM712 ESD protection, but the result still didn't work. It's strange that it works after removing it without soldering (note: SM712 does not need to be soldered).

This is the file data transfer speed of 2.0. There is still some improvement.

This is 1.0 transfer file data speed

Design Files

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Update:2025-05-08 15:29:59

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