10-port USB hub with external power supply.
I've opened it because I thought no power on ports 4...10 when connected only to power adapter is a fault, but I think now this is normal behavior.
As I cannot find precision description (only one I could find seems mostly wrong: https://www.ubuy.com.pl/en/product/87DHPNTA-amazon-basics-usb-a-3-1-10-port-hub-with-power-adapter-65w-powered-20v-3-25a-silver) here are few notes:
- hub does not work without power adapter (at least with my test with USB 2.0 cable), it is not even detected by PC
- ports 4...10 are not powered when hub is not connected to PC
- nominal maximum current: 2.4A for ports 1...3, 0.9A for other ports
- all ports are data-capable and have same sockets (USB 3.0-like)
- output voltage is slightly on high side: 5.2 V
- host port socket: USB-B SuperSpeed
Overall quite solid construction.
3x VL817 USB 3.1 USB hub from VIA Labs Inc. - company specializing in USB technology. Chip itself is on the market from May 2017.
As each hub has 4 downstream port, my guess is these chips are cascade-connected.
Each chip has own 25L512E SPI Flash chip (512 kbit).
HU39002V1 V1_0 2017/11/30
Two "big" DC/DC converters with "AVICUH" marked chips.
LED next to each port activates when there is data connection.
Each of 1...3 ports is accompanied by chip with "5AAAJ" markings.
Each of 4...10 ports has G547G1 chip - 90 mOhm power distribution switch with 1.5 A current limit and overcurrent output.
Power supply: Chicony A16-065N2A, 20 V, 3.25 A - seems to be decent quality.
No comments:
Post a Comment