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Will Chromecast losing power of tablet pc(AsusT100TAL)?


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#1 BenXY

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Posted 03 September 2016 - 12:59 AM

Hi all,

 

Following the title of the thread "Will Chromecast losing power of tablet pc(AsusT100TAL)?", let me add some more background details, I had tried "micro USB to mini hdmi" for projecting screen from my Asus T100TAL computer to wide screen monitor, after a few tries, I realized that my tablet pc will losing battery power even with charging connection by doing so.  So now, I am considering Chromecast with a purpose to routine screen projection from my tablet PC to wide screen monitor, but only if I can make sure my tablet PC will not losing battery power even with charging connection, I had two opposite opinions when I posted the question in Facebook group of related domain topic, so I figure I need to post the question to a more professional forum, so I post it here, thank you in advance for your attention.

 

Regards,

 

Ben



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#2 Trikein

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Posted 03 September 2016 - 08:37 AM

What power connector and power adapter are you using to charge? Sounds like it's a non-official replacement. 



#3 BenXY

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Posted 03 September 2016 - 11:24 PM

What power connector and power adapter are you using to charge? Sounds like it's a non-official replacement. 

 

Thank you for your attention. The reason I am here for the query derives from a purpose of purchase performance evaluation, so I can't answer your question before purchase made.



#4 Trikein

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Posted 05 September 2016 - 06:29 PM

I am sorry, I misunderstood your question. I think you are asking if a HDMI>Micro USB adapter will charge the tablet. I think the answer is NO. There is some power that runs over HDMI, but it is much weaker then that power you can run over USB. About 1/10th. Plugging it in this way when the tablet is off may "trickle" charge it, but it would take a long time. This site explains it well:

 

The specification of the +5V charge is 50mA(according to wikipedia) This is even lower as USB before enumeration(100mA) Any device wouldn't be able to charge , or it will be very slow at 50mA (10x slower than normal USB port at full power, 500mA)

I don't think the HDMI connectors are specified for high currents in excess of 0.5A. Furthermore, the +5V is probably used in the monior to power some small circuits for identification of itself to the PC/television/etc. , even if it's turned off.






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