qc3 charger

phier

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hello.
i bought qc3 charger with 2x qc3 usb outputs. I have 3 wireless qc chargers placed on different places around tables. I was wondering if i can somehow split one qc3 usb port from the charger and link it into 2 wireless chargers... but only 1 will be used at the time. Is such a thing possible?

Also is there some standard which defines how long cable can go from usb qc3 charger to wireless qc charger, is there some limitation?

I was wondering if there is such an option to do central cable management in one room/flat utilizing usb qc3 charger ... ie to have one usb qc3 charger with lets say 4 ports and link it with cables from different parts of the room / flat.


thanks!
 
Quick Charge is a third party extension to USB so unlike the main standard or official extensions like USB-PD you can't just bring up the standards document and look up the answers.

I've not heard of either a hub or an official cable length limit for qualcomm's quick charge.
 
hi,
even its not official its not documented? just want to make only cable splitter.
 
@EndlessWaves is that so hard to find which lines and how to split them ... i still dont undertand why standard usb cable splitter from ebay doesnt work... ;;/ i might open cables and check it manually or i dont know ... how else to do it.

but the reason is that there are no chargers with more then 2x qc.30 ports.. and i have lets say 5x qc3 chargers... but charging only 1 phone at the moment... but on different places in room .. thats why i wanted to split output from charger to multiple chargers...
 
USB power beyond the base amount is negotiated so you won't be able to just connect the wires together. You need an actual chip that can negotiate quickcharge rates with each device pulling power individually, then negotiate with the power supply to pull the appropriate amount of power for both.

Given the variable voltage involved in QC3 you'd likely also need a transformer in there too.

I'm not sure why high capacity multi-port USB power supplies are so scarce, they're hard to find even for USB-PD which is more common among higher power devices.

5 port QC3 chargers have been made, e.g. this one
 
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PIQ is PowerIQ which is an Anker marketing term which translates as 'this port supports multiple power standards'.

Anker unhelpfully don't tell you which ones they are.

You can probably depend on it having USB-BC 1.2 which most devices also support for 7.5W as well as Apple 2.4A.

It may support some version of the quick charge standard but probably only at 5V, meaning it's delivering maximum of 12W if it offers the 2.4A over Quickcharge, not the 25-36W of higher power QC3 implementations.


Cable length for USB generally is a few meters. It should be better for devices operating at a higher voltage and will vary with the cable used (e.g. some have thicker power conductions and different end connectors will affect it).

It might be worth contacting one of the english speaking cable companies and seeing if they can give you their experience of how well QC3 works on longer cables.

How much power do you lose if your wireless chargers use the next best protocol they support?
 
USB power beyond the base amount is negotiated so you won't be able to just connect the wires together. You need an actual chip that can negotiate quickcharge rates with each device pulling power individually, then negotiate with the power supply to pull the appropriate amount of power for both.

Given the variable voltage involved in QC3 you'd likely also need a transformer in there too.

I'm not sure why high capacity multi-port USB power supplies are so scarce, they're hard to find even for USB-PD which is more common among higher power devices.

5 port QC3 chargers have been made, e.g. this one
ah, my stupidity... there was last one - used on amazon.co.uk and it's gone now ... so no chance to buy that item anymore anywhere... maybe they discontinued it :( no idea why... so there are no more 5 port qc3.0 chargers... or at least i can't find any replacement :(
 
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You're asking if I know of any others? I don't I'm afraid, I don't follow model launches

I had a quick look around and there wasn't anything obvious, although I did see that you can buy DC-DC charger boards fairly cheaply, e.g.

I don't know a great deal about electricity but I think you'd need an AC-DC power supply and a case to put it all in, plus some basic soldering and that'd give you as many ports as you wanted. Perhaps worth a chat with any electrically inclined friends, local electricians or the people at a local maker space?
 
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hello @EndlessWaves
was checking it but question it if its support 4 devices of qc3.0 at the same time .. and also what ac-dc adaptor is required for such a case. thanks

my stupidity i didnt buy the one you sent link on... and its gone now ;/
 
There are multiple models available, some of which go into more detail and explicitly say they support QC3.0 on all channels e.g. this one:

They're probably cheaper on Aliexpress, but the risk of badly designed ones is likely a bit higher (a UK components shop would be even better if you can find one selling them).

You would need an AC-DC power supply within the specified voltage range for the board (or possibly a multiple of that depending on how you were hooking up more than one board?) with sufficient wattage to cover your demands. I'm guessing something like a laptop power brick would likely be a fairly cheap and reliable option for one board, they're usually 19v and available up to about 100-120W.

Although as I say you'd really want to talk to someone with knowledge of building electrical stuff to get a real run down of the practicality and cost. If don't have anyone local there are plenty of online communities with this sort of knowledge. AVF doesn't really have a section for this, but I believe there are one or two electricians that hang around the DIY/General sections.
 
hi,
so banggood.com is ok or its same as aliexpress?

regarding to the ac-dc power supply : they say Please use 12V-30V DC power supply ,, so it can be 19 or 30v dc - 90-120W, right?

well soldering should be fine to me.

thanks
 
i found ac-dc Phobya external PSU 230V to 4Pin Molex 70W including Euro/UK plug
but its at the output 5/12V 70W

the qc3.0 modules spec says:

Input voltage range: 4.5V to 32V (the input voltage must be higher than the output voltage because it is a voltage drop type module)

Output voltage range: 3V to 12V (automatically adjusted according to the fast charge protocol)

Output power: maximum 24W (4V3.6A, 5V3.4A, 9V2.5A, 12V2A, etc.)
 
this guy might work - righT? Minleaf 96W 12V-24V Regulated Output Power Supply Adapter AC DC Power Adapter Charger US Plug Electrical Equipment & Supplies from Industrial & Scientific on banggood.com

or that one

also
 
Bear in mind that buying from abroad you need to account VAT if the item is over £15 - you'll get a bill for it when customs examines the package. A lot of shipping companies also like to add customs handling charges if VAT is due, rather than charging the seller up front, which can add £10-15.

Banggood is an individual shop, not an ebay-style marketplace like aliexpress. But like most of the Chinese shops it does specialise in cheap goods and minimal after sales service. Banggood do have one of the better reputations for stock quality, but not to the point where I'd expect everything to even meet minimum UK safety standards.

I wouldn't buy an AC-DC power supply directly from china, there's been plenty of examples of ones where they're just not safe. Buying from an accountable retailer in the UK won't be much more expensive after customs.

regarding to the ac-dc power supply : they say Please use 12V-30V DC power supply ,, so it can be 19 or 30v dc - 90-120W, right?

I'd probably avoid the extreme ends up the voltage range as the can wander from the specified output but certainly 19v and 24v ones are common and perfectly fine. 30V for a board rated for 32V should be ok.

Wattage should be a minimum of what the devices you've plugged in can draw, plus a bit extra for conversion losses. 105W would be sensible for a 96W board, although you could probably get away with 100W. 90W is too low if you want the capability to run all four outputs at maximum.
 

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