There are so many charger bricks out there that I wonder if there's a good
way (other than reading the owners manual which is long lost usually) to
tell if a charger has PD or QC output?

Generally I assume any charger with a USB-C port is probably one or the
other or both but I can't read the microprint on the side of most of them.

Is there a way to tell other than getting a microscope to read that print?

Mickey D <mickeydavis078XX@ptd.net> wrote:
> There are so many charger bricks out there that I wonder if there's a good
> way (other than reading the owners manual which is long lost usually) to
> tell if a charger has PD or QC output?
>
> Generally I assume any charger with a USB-C port is probably one or the
> other or both but I can't read the microprint on the side of most of them.
>
> Is there a way to tell other than getting a microscope to read that print?

There are testers you can buy which will talk to the PD or QC control
signals and tell you what it claims to do. Look on Amazon, Aliexpress, etc.

Not a recommendation, just an example:
https://www.amazon.com/Voltage-Multimeter-Detection-Capacity-Measurement/dp/B0BS2ZS813/

If the microprint tells you the voltages (5/9/12/15/20/48V) you can infer
the PD capability from that, but to do that you'd need to read it. Try
taking a photo when lit from an oblique angle, which should pick up the
embossing, then zoom into the photo.

Theo

On 14 Oct 2024 11:34:09 +0100 (BST), Theo wrote:

> There are testers you can buy which will talk to the PD or QC control
> signals and tell you what it claims to do. Look on Amazon, Aliexpress, etc.
>
> Not a recommendation, just an example:
> https://www.amazon.com/Voltage-Multimeter-Detection-Capacity-Measurement/dp/B0BS2ZS813/
>
> If the microprint tells you the voltages (5/9/12/15/20/48V) you can infer
> the PD capability from that, but to do that you'd need to read it. Try
> taking a photo when lit from an oblique angle, which should pick up the
> embossing, then zoom into the photo.

Thanks for that information.

What happened to me is I have a desktop portable Jteman bluetooth mount
which is charged by USB-C but which won't charge out of my only USB-C
charger (which is an ONKO with 2 USB-C ports and one USB-A port).

Charger: 67W Multiport GaN charger
Model CH-GN67W2ClA
The specs are super complicated (depending on how many ports are used).
But I only used one port at a time.

The cables are all known to be good because they charge my phone fine.

When I plug the Jteman to the USB-C ports of the charger, it won't charge.
JTEMAN Phone Stand with Bluetoolh Speaker
Product Model: L9
Battery capacity: 1800mah
Type-C Input · DC 5V 1A
Bluetooth Name: MH669
Power of Speaker: 403W
Product Size: 136x89x48mm ~

But when I plug the Jteman to the USB-A port of the charger, it charges.
Does anyone have any idea why that happens?

I'm assuming it's a PD/QC thing - but I have no real idea why it happens.

Mickey D, 2024-10-14 16:58:

> On 14 Oct 2024 11:34:09 +0100 (BST), Theo wrote:
>
>> There are testers you can buy which will talk to the PD or QC control
>> signals and tell you what it claims to do. Look on Amazon, Aliexpress, etc.
>>
>> Not a recommendation, just an example:
>> https://www.amazon.com/Voltage-Multimeter-Detection-Capacity-Measurement/dp/B0BS2ZS813/
>>
>> If the microprint tells you the voltages (5/9/12/15/20/48V) you can infer
>> the PD capability from that, but to do that you'd need to read it. Try
>> taking a photo when lit from an oblique angle, which should pick up the
>> embossing, then zoom into the photo.
>
> Thanks for that information.
>
> What happened to me is I have a desktop portable Jteman bluetooth mount
> which is charged by USB-C but which won't charge out of my only USB-C
> charger (which is an ONKO with 2 USB-C ports and one USB-A port).
>
> Charger: 67W Multiport GaN charger
> Model CH-GN67W2ClA
> The specs are super complicated (depending on how many ports are used).
> But I only used one port at a time.

What means "super complicated"? Can you provide a source for that? Maybe
a picture?

> The cables are all known to be good because they charge my phone fine.
>
> When I plug the Jteman to the USB-C ports of the charger, it won't charge.
> JTEMAN Phone Stand with Bluetoolh Speaker
> Product Model: L9
> Battery capacity: 1800mah
> Type-C Input · DC 5V 1A
> Bluetooth Name: MH669
> Power of Speaker: 403W
> Product Size: 136x89x48mm ~
>
> But when I plug the Jteman to the USB-A port of the charger, it charges.
> Does anyone have any idea why that happens?

Most likely the speaker does use USB-PD and the USB-C connection is just
there because many smartphones have USB-C cables even for QC using USB A
on the charger side.

> I'm assuming it's a PD/QC thing - but I have no real idea why it happens.

Get a USB tester which displays the protocol as suggested - then you can
check it.

--
Arno Welzel
https://arnowelzel.de

Arno Welzel, 2024-10-14 22:47:

> Mickey D, 2024-10-14 16:58:
>
>> On 14 Oct 2024 11:34:09 +0100 (BST), Theo wrote:
>>
>>> There are testers you can buy which will talk to the PD or QC control
>>> signals and tell you what it claims to do. Look on Amazon, Aliexpress, etc.
>>>
>>> Not a recommendation, just an example:
>>> https://www.amazon.com/Voltage-Multimeter-Detection-Capacity-Measurement/dp/B0BS2ZS813/
>>>
>>> If the microprint tells you the voltages (5/9/12/15/20/48V) you can infer
>>> the PD capability from that, but to do that you'd need to read it. Try
>>> taking a photo when lit from an oblique angle, which should pick up the
>>> embossing, then zoom into the photo.
>>
>> Thanks for that information.
>>
>> What happened to me is I have a desktop portable Jteman bluetooth mount
>> which is charged by USB-C but which won't charge out of my only USB-C
>> charger (which is an ONKO with 2 USB-C ports and one USB-A port).
>>
>> Charger: 67W Multiport GaN charger
>> Model CH-GN67W2ClA
>> The specs are super complicated (depending on how many ports are used).
>> But I only used one port at a time.
>
> What means "super complicated"? Can you provide a source for that? Maybe
> a picture?
>
>> The cables are all known to be good because they charge my phone fine.
>>
>> When I plug the Jteman to the USB-C ports of the charger, it won't charge.
>> JTEMAN Phone Stand with Bluetoolh Speaker
>> Product Model: L9
>> Battery capacity: 1800mah
>> Type-C Input · DC 5V 1A
>> Bluetooth Name: MH669
>> Power of Speaker: 403W
>> Product Size: 136x89x48mm ~
>>
>> But when I plug the Jteman to the USB-A port of the charger, it charges.
>> Does anyone have any idea why that happens?
>
> Most likely the speaker does use USB-PD and the USB-C connection is just

.... does NOT USE USB-PD of course ...

Because then it ALWAYS works with a USB-A connector, maybe just with the
minimum charge at 5V and 0.5A. But USB-C requires to negotiate the
charging protocol before you can draw power to charge.

> there because many smartphones have USB-C cables even for QC using USB A
> on the charger side.
>
>> I'm assuming it's a PD/QC thing - but I have no real idea why it happens.
>
> Get a USB tester which displays the protocol as suggested - then you can
> check it.

--
Arno Welzel
https://arnowelzel.de

On Mon, 14 Oct 2024 22:47:43 +0200, Arno Welzel wrote:

> What means "super complicated"? Can you provide a source for that? Maybe
> a picture?

Here is a picture where the specs on the charger are so super complicated
that I tried to type them up but after ten or fifteen minutes, I gave up.

https://i.postimg.cc/pLSTY4nJ/Clipboard.jpg

How would you describe those super complicated charger specifications
sufficient to explain why the USB-C ports don't charge the bluetooth?

Arno Welzel <usenet@arnowelzel.de> wrote:
> ... does NOT USE USB-PD of course ...
>
> Because then it ALWAYS works with a USB-A connector, maybe just with the
> minimum charge at 5V and 0.5A. But USB-C requires to negotiate the
> charging protocol before you can draw power to charge.

I'm guessing the USB-C input on the speaker doesn't have the appropriate
CC1/CC2 resistors to tell the charger to output 5V at some amps. So the PSU
is only doing the minimum output according to the spec. On the USB-A output
from the charger it'll output 5V all the time, even with nothing plugged in,
but on USB-C you have to ask for it. Maybe they just swapped a microUSB for
a USB-C socket without any further adjustments.

A dumb PSU will output 5V regardless, but this one is too smart.

How to add the resistors:
https://forum.digikey.com/t/simple-way-to-use-usb-type-c-to-get-5v-at-up-to-3a-15w/7016

A simpler alternative would be a USB-C to USB-A female cable, followed by a
USB-A male to C cable. The C to A female cable should have the resistors in
place to force the output to 5V.

Theo

Mickey D, 2024-10-15 06:33:

> On Mon, 14 Oct 2024 22:47:43 +0200, Arno Welzel wrote:
>
>> What means "super complicated"? Can you provide a source for that? Maybe
>> a picture?
>
> Here is a picture where the specs on the charger are so super complicated
> that I tried to type them up but after ten or fifteen minutes, I gave up.
>
> https://i.postimg.cc/pLSTY4nJ/Clipboard.jpg

Well - it does not tell, if this charger is USB-PD or QC or both.

> How would you describe those super complicated charger specifications
> sufficient to explain why the USB-C ports don't charge the bluetooth?

I would recommend to get a charger where the supported standards are
documented by the manufacturer. Having a list of USB port combinations
and the possible power output for the combination does not help at all
in this matter.

However the list itself is not that "complicated". For example:

USB-C1+USB-C2:45W+20W (65W Max)

So if you connect one device to USB-C1 and a second device to USB-C2,
the port USB-C1 provides up to 45W and USB-C2 up to 25W.

USB-C1+USB-A:45W+18W (63W Max)

So if you connect one device to USB-C1 and a second device to USB-A, the
port USB-C1 provides up to 45W and USB-A up to 18W. And the line below
explains, how the 18W on USB-A is achieved - using 5V at 3.6A which is
5*3.6 = 18 Watts

--
Arno Welzel
https://arnowelzel.de

On Tue, 15 Oct 2024 14:00:58 +0200, Arno Welzel wrote:

>> https://i.postimg.cc/pLSTY4nJ/Clipboard.jpg
>
> Well - it does not tell, if this charger is USB-PD or QC or both.

Thanks for taking a look at the image as the spec was complicated for me.
https://i.postimg.cc/pLSTY4nJ/Clipboard.jpg

I think it has both based on the product description here
https://www.amazon.com/Charger-GOLDNEXT-Foldable-Block-Cable/dp/B0BYNQBSQ5
"Our 67W 3-port charger features dual USB-C (PD3.0) and 1 USB-A (QC3.0)
ports."
>> How would you describe those super complicated charger specifications
>> sufficient to explain why the USB-C ports don't charge the bluetooth?
>
> I would recommend to get a charger where the supported standards are
> documented by the manufacturer. Having a list of USB port combinations
> and the possible power output for the combination does not help at all
> in this matter.
>
> However the list itself is not that "complicated". For example:
>
> USB-C1+USB-C2:45W+20W (65W Max)
>
> So if you connect one device to USB-C1 and a second device to USB-C2,
> the port USB-C1 provides up to 45W and USB-C2 up to 25W.
>
> USB-C1+USB-A:45W+18W (63W Max)
>
> So if you connect one device to USB-C1 and a second device to USB-A, the
> port USB-C1 provides up to 45W and USB-A up to 18W. And the line below
> explains, how the 18W on USB-A is achieved - using 5V at 3.6A which is
> 5*3.6 = 18 Watts

Thanks. They had all those extra sections on the charger in the photo
showing what the output was which I will use Irvanview OCR plugins to get
the output which is below for the super complicated specifications I see.

https://i.postimg.cc/pLSTY4nJ/Clipboard.jpg

Here's the Irfanview OCR plugin output - which I checked for accuracy.
67W Multi port GaN charger
Model: CH-GN67W2C1A
Int: 100-240V~50/60Hz,1.5A Max.
Out: USB-C1:5V=3A,9V=3A,12V=3A,15V=3A,20V=3.35A,67W Max.
USB-C2: 5V=3A,9V=3A,12V=3A,15V=3A,20V=3.35A,67W Max.
USB-A: 4.5V=5A,5V=4.5A,9V=2A,12V=1.5A,22.5W Max.
USB-C1+USB-C2: 45W + 20W(65W Max.)
USB-C1+USB-A: 45W + 18W(63W Max.)
USB-C2+USB-A: 5V=3.6A
USB-C1+(USB-C2+USB-A) Total: 45W + 18W(63W Max.)
PPS: 3.3-20.3V=3.3A Max.
CONFORMS TO UL STD.62368-1
CERTIFIED TO CSA STD.C22.2 NO.62368-1

Is that the PD & QC spec that the advertising says it is?
https://www.amazon.com/dp/B0BYNQBSQ5

Mickey D, 2024-10-15 17:37:

> On Tue, 15 Oct 2024 14:00:58 +0200, Arno Welzel wrote:
>
>>> https://i.postimg.cc/pLSTY4nJ/Clipboard.jpg
>>
>> Well - it does not tell, if this charger is USB-PD or QC or both.
>
> Thanks for taking a look at the image as the spec was complicated for me.
> https://i.postimg.cc/pLSTY4nJ/Clipboard.jpg
>
>
> I think it has both based on the product description here
> https://www.amazon.com/Charger-GOLDNEXT-Foldable-Block-Cable/dp/B0BYNQBSQ5
> "Our 67W 3-port charger features dual USB-C (PD3.0) and 1 USB-A (QC3.0)
> ports."

Ok, in this case, it supports both - QC on the USB-A-Port and USB-PD on
the USB-C-Ports.

Many Chinese phones like Xiaomi or Huawei use QC and not PD.

As I already suggested: most likely the Bluetooth speaker you mentioned
does not support USB-PD at all since this is not that relevant on the
Chinese market (yet). It will just take what it gets and the USB-C input
is just for convencience, so it is easier to use a cable provided with
your QC compatible phone and the QC charger which usually uses a USB-A
connector for the carger side.

--
Arno Welzel
https://arnowelzel.de