Electronics > Projects, Designs, and Technical Stuff
USB 2A charging requirements
drummerdimitri:
It is my understanding that most non-fast charging USB phones and devices can charge at a max rate of 2A and 5V from a USB socket.
If that is the case, what are the requirements to get faster than 0.5A charging which is standard on most USB 2.0 devices?
The reason I ask is because I am building my own power bank with 4 non-fast charging outputs but would like the ability to charge a device at its maximum rate will keeping the output voltage 5V.
Currently I am using short (20 cm) 24 AWG wires to wire up the USB plugs and very short and high quality USB cables to charge my Galaxy S10 but I am only able to charge it at around 500 mA when almost empty while a regular 2A USB wall charger could provide it with such current levels.
Is there some kind of handshaking process to allow for faster charging rates that I am not aware of? :-//
langwadt:
https://electronics.stackexchange.com/questions/177788/how-do-i-design-a-2a-or-more-power-supply-for-my-consumer-usb-devices
drummerdimitri:
Will this board do the job?
https://www.aliexpress.com/item/32922833773.html?spm=a2g0o.productlist.0.0.35905676Jpajjw&algo_pvid=d47917bb-6d82-47ac-a316-235dd001f6d4&algo_expid=d47917bb-6d82-47ac-a316-235dd001f6d4-1&btsid=73719a91-d95b-4349-9ee7-75fba79d498a&ws_ab_test=searchweb0_0,searchweb201602_6,searchweb201603_52
GromBeestje:
Short the D+ and the D- (the middle pins) in the USB connector on the charger.
drummerdimitri:
--- Quote from: GromBeestje on December 02, 2019, 06:20:28 pm ---Short the D+ and the D- (the middle pins) in the USB connector on the charger.
--- End quote ---
Thanks for that! I am only able to charge at 1A though.
Still not clear how to pull 2A from the port.
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