Test/review of QC3.0/2.0 trigger

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HKJ
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Test/review of QC3.0/2.0 trigger

QC3.0/2.0 trigger
DSC_3693
This is a Quick Charge trigger, it is mostly used for testing chargers, but can also be used to converter a QC charger into a power supply with other than 5V output.
DSC_3597
The trigger is delivered in a plastic bag, there was no box. As can be seen on the photos one of the usb connectors got slightly damaged in transit (I could fix it with somme pliers).
DSC_3598
The circuit board contains: A unknown microcontroller, a EEPROM, a voltage regulator, a lot of very small resistors, indicator leds and 3 buttons. Some of the resistors are used to generate the QC voltage levels.
DSC_3612
The mode button is used to selecte between QC2 and QC3.
The V+/V- will step voltage up/down:
In QC2 mode it is 5V, 9V, 12V and maybe 20V (If the charger supports it).
In QC3 mode it is in 0.2V steps from about 3V to 12V or 20V. Double click on +/- will change to auto increment/decrement, click again to stop.
The device will remember last selection when power is removed and automatic restore it again when power comes back.
DSC_3601
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DSC_3602 DSC_3604
Measurements


  • The marked voltage ranges on the leds are correct.
  • Both QC2 and QC3 mode will remember settings, even when power is removed.
  • QC3 mode will reset when QC2 mode is selected.
  • QC2 mode will not reset when QC3 mode is selected.
  • Resistance in plus connection is about 57mOhm including connector resistance
  • Resistance in minus connection is about 50mOhm including connector resistance
  • Resistance from usb solder blop to solder blop is 2.5mOhm on minus.
  • Resistance from usb solder blop to solder blop is 13.5mOhm on plus.

autoIncrement
A double click on the V+ button will start the increasing ramp in QC3 mode, press again to stop the ramp. The ramp needs about 5 seconds to go from lowest to highest voltage. I tried this on a couple of different QC3 chargers and the time was about the same on all.
The trigger will continue to send increase pulses, until V+ is pressed again.
autoDecrement
A double click on the V- button will start the decreasing ramp in QC3 mode, press again to stop the ramp. This also takes about 5 seconds.
Voltage%20sweep
Current consumption of trigger. This depends a bit on voltage.
Conclusion
The trigger works fine, but I am not too happy about the usb output connector, it is way to easy to fry a device that cannot handle the full QC voltage.
To get lower DC resistance for testing, it is easy to solder some thick wires on it and bypass the second usb connector and thin usb wires.
I will call it a good device for testing, but be aware that it can easily fry a 5V usb device.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

angerdan
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Thanks for the review Thumbs Up

xnode
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Thanks for the review. I’ve bought this adapter from banggood but didn’t arrive yet. Can I use this adapter to fast charge a LG G6 connecting to the USB port of my notebook?

Note that the USB port can provide high current, but when connecting the phone directly to it, the phone only charges at 400mA. I want to trick the phone into thinking that is connected to the wall.

cu42
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I see this as a handy device.

Thanks for the info!

DavidEF
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cu42 wrote:
I see this as a handy device.

Thanks for the info!


Yeah, I never knew this kind of thing existed. But, it could be a great device for using any high-output capable USB charger as a power supply for electronics.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
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Phlogiston
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xnode wrote:
Thanks for the review. I’ve bought this adapter from banggood but didn’t arrive yet. Can I use this adapter to fast charge a LG G6 connecting to the USB port of my notebook?

Note that the USB port can provide high current, but when connecting the phone directly to it, the phone only charges at 400mA. I want to trick the phone into thinking that is connected to the wall.

No. Do not do this. See here for more information.
DavidEF
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Phlogiston wrote:
xnode wrote:
Thanks for the review. I’ve bought this adapter from banggood but didn’t arrive yet. Can I use this adapter to fast charge a LG G6 connecting to the USB port of my notebook?

Note that the USB port can provide high current, but when connecting the phone directly to it, the phone only charges at 400mA. I want to trick the phone into thinking that is connected to the wall.

No. Do not do this. See here for more information.

Phlogiston, did you notice that xnode was the one asking the same question in that other thread? Facepalm

xnode, you may have to break down and get a real charger for your phone.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

Phlogiston
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DavidEF wrote:
Phlogiston, did you notice that xnode was the one asking the same question in that other thread? Facepalm
Yes Smile

You never know who else might drop in via Google and have a bad idea seeded into their head, so I prefer to add extra links to the warning as well, even at the price of clutter.

xnode
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DavidEF wrote:

Phlogiston, did you notice that xnode was the one asking the same question in that other thread? Facepalm

xnode, you may have to break down and get a real charger for your phone.


Of course I’ve asked twice because they are two different adapters, so you can provide a custom answer for each one. No need to be condescending here.

I already have a proper wall charger but would like to be able to quick charge it as well just connecting it to the computer and not being stuck with 400mA. Obviously the data ports will not be available for data transfer in this case.