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