Quick Charge 3.0 Trigger - More Power From USB

Introduction: Quick Charge 3.0 Trigger - More Power From USB

The QC technology is very interesting for everyone who has a smartphone but also the DIY community can take profit from it.

QC itself is simple. If "the smartphone says -i need more power-" the QC charger increases the voltage. In the 2.0 version there are 5, 9, 12 (and 20) V. QC 3.0 can increase or decrease the voltage in steps of 200 mV.

Step 1: How It Works:

I think the best way to understand QC 3.0 is to read this (http://blog.rnix.de/12v-from-a-usb-powerbank/) article about version 2.0. Especially the "QuickCharge Handshake" part.

In short:

1. apply 0,4V-2V to D+ (D- is not connected)

2. apply the voltages to D+ and D- as shown in the table --> here we go, you can now enter the 9 or 12V (or 20V) mode (by the way it also woks with QC 3.0, because 2.0 is supported)

So what is the trick to select our voltage in steps of 200mV?

This datasheet (http://www.mouser.com/ds/2/308/FAN6290QF-1099224.pdf), page 12, shows us the way. We only have to enter "Continuous Mode" (as shown in the table |D+-->0.6V D- -->3.3V|). Now we are in continuous mode. To increase the voltage pull D+ to 3.3V for a short time. To decrease the voltage pull D- to 0.6V for a short time. (have a look at the diagrams from http://www.mouser.com/ds/2/308/FAN6290QF-1099224....

Step 2: Simple Circuit:

Here you can see a simple circuit. It is really important to choose buttons with less bouncing. The best way is to build up a breadboard with the circuit and test the buttons of your choice.

Step 3: Additional Notes

- the voltage-display is a simple one from ali (https://www.aliexpress.com/wholesale?ltype=wholesale&d=y&origin=y&isViewCP=y&catId=0&initiative_id=SB_20170424231520&SearchText=volt+meter&blanktest=0&tc=af

- if you want to go up to 20V choose another voltage regulator, this one can only handle 15V, but in the most case (like in mine) the QC device only supports up to 12V I think

- when connecting USB, disconnect D- before (the jumper in my circuit)

- Why don't use a step up? Because QC can provide more power.

- with the resistor values (as shown in the picture) you do not get the exact voltages, but for me they are working

Be the First to Share

    Recommendations

    • The 1000th Contest

      The 1000th Contest
    • Battery Powered Contest

      Battery Powered Contest
    • Hand Tools Only Challenge

      Hand Tools Only Challenge

    5 Discussions

    0
    DonI12
    DonI12

    4 months ago

    is there any way to make passive circuits triggering only specific voltages?

    0
    PeterS539
    PeterS539

    Reply 4 months ago

    If you just want to plug in your passive circuit, without setting the jumper, I don't know... With setting the one jumper you can use the voltages shown in the table above. Nowadays I wouldn't build this by myself. On aliexpress you can find many pre-made triggers. For usb type c there are even trigger for specific voltages.

    1
    oldmanbeefjerky
    oldmanbeefjerky

    2 years ago

    some advice;
    a link to getting the FAN6290Q would be nice as well as an explanation on how its actually operating.

    a better look at the schematic of your board there would have been appreciated too. It took me the whole day to figure out that the way the controller works is that it uses high speed switching to step down a normally AC output from a flyback transformer.

    0
    signuplease
    signuplease

    Reply 1 year ago

    oldmanbeefjerky, would be nice then if you could share your findings in a *real* instructable, with the code for the ATINY. Cheers!

    0
    Swansong
    Swansong

    3 years ago

    That's neat :)