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knuttle wrote:
Are the multivoltage smarts in the phone or in the USB-A charging brick?
In my wall wort box were a dozen USB charging bricks.
Removing the duplicates, the varying voltages & current outputs were 4.6-5.3V@0.5A (duracell)
5.0V@.85A (doncdo)
5.1V@0.7A (lg)
5.1V@2.1A (newtrent rohs)
5.2V@2.4A (apple)
9.0V@1.8A & 5.0V@1.8A (lg)
9.0V@1.67A & 5.0V@2.0A (samsung)
12V@1.5A & 9V@2.0A & 5V@3.0A (motorola)
For the multivoltage bricks are they phone specific?
Yes and no -- the phone (laptop, whatever) would need to be USB-C
Power Delivery compliant to request the 9 or 12 volt setting. Without
being "compliant" with that, the charger will only output 5 volts at
whatever the USB 2/3 spec is (500 mA?).
Although, I'm fairly certain that in order to actually negotiate for
USB-C PD, you need USB-C connectors at both ends, in order to have all
the requisite pins (although a USB-3 connector MIGHT have a compatible
pinout to allow USB-C PD as well -- I'm not fully versed in the pinout differences between the two).
Are they phone model specific?
Not really (assuming they're all standard USB-A plugs, just swap for a
matching USB cable).
Or can any recent phone use any of the multiple voltages?
Especially the 12V and 9V multivoltage bricks.
Most of the multi-voltage ones rely on newer pins in USB3 /USBC to
actually negotiate for high voltage. If all you have is a USB2 ->
mini- / micro-B connector, you'll only get 5 volts.
Are the smarts in the phone to be able to use any multivoltage brick?
Or in the brick?
Both.
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