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[Q] USB OTG *AND* charging at the same time.

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By ssuukk, Senior Member on 17th November 2011, 08:35 AM
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Hello,

Can you have USB OTG and phone charging at the same time? Or even better: HDMI + USB OTG + charging? Without power the phone discharges fast, not to mention - with HDMI out connected I won't be able to connect external HD with movies... Oh, bother...

Or is there some magic do-it-all dongle?
 
 
17th November 2011, 08:38 AM |#2  
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I need it too .

I hate some cable in my bag. One Cable for all is great
18th November 2011, 04:20 AM |#3  
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USB OTG does not support charging as it has to supply current to the external device.

MHL (HDMI output) does.
18th November 2011, 03:35 PM |#4  
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Dude, I really hope I'm not misunderstanding, but what is the problem to which 'USB OTG and charging at the same time' is the solution?
Surely you pop your USB stick in, transfer the file and then... stick the charger/HDMI cable back in... and stream wirelessly/over your network?
What were you hoping to achieve? There are several options...
19th November 2011, 07:28 AM |#5  
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Just taking a guess... maybe he wants to use keyboard and mouse etc with his phone, desktop style

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21st November 2011, 07:57 AM |#6  
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Or maybe I just want to play anything from my 1TB HD WITHOUT deciding what should I copy to my phone (which is a waste of time...)
21st November 2011, 09:49 AM |#7  
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Quote:
Originally Posted by ssuukk

Or maybe I just want to play anything from my 1TB HD WITHOUT deciding what should I copy to my phone (which is a waste of time...)

I wanted to do the same thing but it isn't possible . I do however stream from my nas if I don't want to copy stuff to the phone.
2nd December 2011, 07:27 PM |#8  
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Technically, the USB-OTG standard includes provisions for handling this.

There are several occasions where you would want to plug an accessory into a USB-OTG port and still be able to hold the state-of-charge in the host device.

The specific document: Battery Charging Specification, rev 1.2
ACA subsection (Accessory Charger Adapter)
The ID_OTG pin acts as an input in this mode of operating, indicating whether or not the host is allowed to charge.

Figure 6-6 shows the typical architecture.
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3rd December 2011, 08:03 AM |#9  
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Sounds promising. I will look into that! Thanx.
3rd July 2012, 03:17 PM |#10  
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Any news on this??
3rd July 2012, 03:35 PM |#11  
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so can we use otg and mhl at the same time without charging
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