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Freescale pushes wireless recharge

5/31/2012 04:55 AM EDT
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palangga
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re: Freescale pushes wireless recharge
palangga   5/31/2012 4:19:33 PM
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What is the advantage of this? If you still have to make contact or proximity to the docking station which is plugged in, what does wireless charging bring to the table?

R_Colin_Johnson
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re: Freescale pushes wireless recharge
R_Colin_Johnson   5/31/2012 6:32:24 PM
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Instead of having to carry a different wall wart for each device you want to plug in and recharge, wireless rechargers all use a standard dock that you just lay the device atop.

WW Thinker
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re: Freescale pushes wireless recharge
WW Thinker   6/3/2012 6:22:00 AM
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Three issues that are potential critical: 1) with 5W of EMI radiating, what is the implication to human health especially in confine area like inside a vehicle; 2) all smartphones except those from SJ/Apple use micro-USB for charging anyway, how can consumers (except those using Apple iXs) be benefited; the said efficiency of 70% does not include the AC/DC portion and the aggregate efficiency has to be much lower than whhatever the USB Wall Charger can achieve; so this run against the "green" principle, doesn't it?

ChipBuilder
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re: Freescale pushes wireless recharge
ChipBuilder   6/3/2012 7:09:09 AM
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its easier to standardize a wireless charging protocol than a plug and voltage polarity? what happens when i empty my pocket with a cell phone and Al foil gum wrapper and small length of rolled up wire, im a EE after all, and it bursts into flames?

chanj0
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re: Freescale pushes wireless recharge
chanj0   5/31/2012 4:50:35 PM
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Inductive charging has been a very hot topic these days. There is no doubt technology has improved substantially. The charging efficient wasn't very good in the old days. What's the charging efficient now?

R_Colin_Johnson
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re: Freescale pushes wireless recharge
R_Colin_Johnson   5/31/2012 6:33:29 PM
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Efficiency is up to 80 percent, and with multiple coils that automatically switch on and off, you don't have to line up the device perfectly to get good wireless power transfers.

Robotics Developer
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re: Freescale pushes wireless recharge
Robotics Developer   5/31/2012 8:47:49 PM
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I can see a possible future for all desks and workstation areas having this wireless power recharger built in. I would love to have the freedom to run any application, anywhere, on my laptop/handheld without needing to watch the battery life. If it would be retrofitted onto plane drop down trays - that would be just wonderful. Imagine, flying coast to coast using your power hungry laptop on full brightness and not running out of power!

R_Colin_Johnson
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re: Freescale pushes wireless recharge
R_Colin_Johnson   6/1/2012 5:32:34 PM
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Hopefully, countertops everywhere, even at Starbucks, will have built-in rechargers so you don't even have to remember to charge your gadgets.

WW Thinker
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re: Freescale pushes wireless recharge
WW Thinker   6/3/2012 7:10:28 AM
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Well, can you or anyone show the EMI implication of a room in which multiple smartphones are being charged with 5W output from each of the wireless chargers?

WW Thinker
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re: Freescale pushes wireless recharge
WW Thinker   6/3/2012 8:01:02 AM
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Perhaps, at 14nm and below, when the smartphones and mobile gadgets alike needss recharge current of much less than 500mA, the EMI issue becomes non issue. Or, if energy can be made directional with minute stray radiation, I can really enjoy coffee at Starbuck without any worry of having my brains being "fried".

WW Thinker
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re: Freescale pushes wireless recharge
WW Thinker   6/3/2012 7:08:42 AM
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How was the 80% efficiency deduced? From the point of the AC outlet? Can you or anyone tell how is efficiency compared to the ubiquitous USB Charger with micro-USB connector?

mcgrathdylan
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re: Freescale pushes wireless recharge
mcgrathdylan   6/1/2012 2:48:54 PM
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This is definitely one of those things that I am eager to see implemented on a wide scale. The freedom to unplug and recharge without constantly looking for the right power cord will be very much welcomed at my house.

t.alex
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re: Freescale pushes wireless recharge
t.alex   6/1/2012 3:40:49 PM
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I would prefer to have both wired and wireless charging.

WW Thinker
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re: Freescale pushes wireless recharge
WW Thinker   6/3/2012 7:12:15 AM
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What are the price to pay: in terms of additional weight and z-height of the coils inside a smartphone. There could be more real estate in a tablet / notebook. My concern is what price to pay in a smartphone.

t.alex
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re: Freescale pushes wireless recharge
t.alex   6/9/2012 1:57:33 AM
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a heavy coil maybe :-)

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