usb fastcharge / QC4.0 12v

[isoking]

Im building a multi power charge station, i was wondering if anyone has a plan / schematic for a samsung / iphone quick charge usb? the input source is 12v. I was looking at car chargers but they are $15 each and when i want 4 or 5 its a bit expensive. I was hoping for 1 or 2 IC circuits with a few outputs on them.

 

[ronsimpson]

Input voltage 12 to 15 volts.
Output voltage 5.0 volts.
How many outputs? How much current? (each or total)
Do you want the outputs independent? If one output is shorted out the rest work.
OR Are the outputs dependent? If one output is shorted then the rest do not work.

 

[isoking]

Thanks ron for the reply.
I want 8 outputs. I thought fastcharge / quick charge was a higher voltage.

 

[dougy83]

AFAIK, chargers signal that they can provide a higher current by using resistor dividers on the USB data pins. See https://electronics.stackexchange.c...wer-supply-for-my-consumer-usb-devices/177792

You can get 12V -> 5V/3A converters (you need to adjust the output voltage) for $1 each. Use one per charger output. See https://www.ebay.com.au/itm/Mini-3A...er-Step-Down-Module-LM2596-2596S/263179710165

You may want to adjust the output voltage to 5.2V to make up for voltage drop in thin USB cables.

 

[isoking]

Hi Doug. that makes sense. after seeing the module link you send i went on ali express and found these bad boys.
do you think they would be suitable

1.61US $ |USB DC Step Down Module 12V 24V To QC2.0 QC3.0 Fast Charge Mobile Phone Charging Board For Apple Huawei FCP Quick Charger|Integrated Circuits| - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

 

[dougy83]

They look like they do the things you're expecting (i.e. fast charging Android and iPhone, with varied voltages), and you don't need to fool around with the extra resistors or connectors.

 

[isoking]

thats what i thought, excellent, ill order them.
Thanks for your help