Playback Issues - Audio/Video & Power

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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xenobiared
Level 7

USB Splitter/Hub

I have a Roku stick and a newer (less than 2 years old) Vizio smart TV. The TV only has 1 USB port and I need 2 - 1 for the Roku and one for a HD antenna. Would a splitter or hub work? Do I need a powered hub/splitter? If so, what specific device or specifications (e.g. 3.0 USB?). Many thanks!
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4 Replies
wildsprite
Level 9

Re: USB Splitter/Hub

you would be sharing the power between the 2, this is not likely to work, USB supplies 5 volts DC if powered. your Roku requires 5 volts to run, it is likely your antenna does as well, I suggest you find a creative way to lay out the USB wire from the antenna so it looks neat and use the power brick that came with it or find a way to put a power socket with USB ports behind your TV set 
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atc98092
Level 16

Re: USB Splitter/Hub

It isn't the voltage available, but the current that a USB jack is capable of. A standard USB 2.0 port supplies a maximum of 500 mA (0.5 A). I could only find one reference to the power a Stick consumes, and that was 3 watts. 3 watts at 5 Volts DC is 0.6 A, so a TV USB port is at its limits powering a Stick. Your only option, besides connecting your devices to their own separate power source, would be to use a powered USB hub. That way neither unit is drawing power from the TV. 
Dan
Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
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xenobiared
Level 7

Re: USB Splitter/Hub

"atc98092" wrote:
It isn't the voltage available, but the current that a USB jack is capable of. A standard USB 2.0 port supplies a maximum of 500 mA (0.5 A). I could only find one reference to the power a Stick consumes, and that was 3 watts. 3 watts at 5 Volts DC is 0.6 mA, so a TV USB port is at its limits powering a Stick. Your only option, besides connecting your devices to their own separate power source, would be to use a powered USB hub. That way neither unit is drawing power from the TV. 


Thank you. I saw a couple of powered options on Amazon but didn’t order it yet since I didn’t know how much the voltage would be a factor.
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atc98092
Level 16

Re: USB Splitter/Hub

I see I had a typo in the message you quoted. The Stick consumes 0.6 A, not 0.6 mA. But again, voltage isn't the issue, it's the current. USB only provides 5 VDC, never more or less. But a powered hub should be capable of supplying the minimum standard of 500 mA to each port. Of course, there's nothing that says it can't provide more current, but I would think that any powered hub would be able to power a Roku Stick. 
Dan
Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
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