USB-A charging brick voltages of 12V & 9V & 5.2V & 5.0V & 4.6V...

[knuttle]

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?
Are they phone model specific?

Or can any recent phone use any of the multiple voltages?
Especially the 12V and 9V multivoltage bricks.

Are the smarts in the phone to be able to use any multivoltage brick?
Or in the brick?

 

[Dan Purgert]

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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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