Ch224K fails to trick PD into fast charging 20V

秦天qintian0303

Ch224K fails to trick PD into fast charging 20V [Copy link]

 

There is no output after connecting to PD fast charging. In fact, R1 is not connected to any resistor. Can anyone help analyze it? Is it a problem with the charger? (Lenovo Xiaoxin CC100, maximum support 100W, support PD3.0, notebook power supply is in normal use) Or does it require any special design?

Solved: Pay attention to the problem of cold solder joints on the back

蓝雨夜

20V

CFG2=1

CFG1=0

CFG3=0

EricCheng

Look at the specification, how to configure R1

秦天qintian0303

Blue Rainy Night posted on 2023-7-24 09:06 20V CFG2=1 CFG1=0 CFG3=0

I am using the resistor configuration mode. It seems that I can directly configure CFG1 and select NC.

wangerxian

Has this decoy been reviewed on the forum?

秦天qintian0303

EricCheng posted on 2023-7-24 09:06 Take a look at the specification sheet and see how to configure R1

Theoretically, R1 can be left unwelded.

tagetage

The first reply is the correct answer, the poster should not make such a mistake.

秦天qintian0303

tagetage posted on 2023-7-24 09:15 The first post gave the correct answer. The original poster should not have made such an oversight.

Single resistor configuration
Applicable to applications where different requested voltages can be achieved by modifying the resistor value on the same PCB.
CFG1 connects a resistor to GND, and different resistance values correspond to different voltage request levels. When using the single resistor configuration, the CFG2 and CFG3 pins can be left floating. NC 20V

秦天qintian0303

wangerxian posted on 2023-7-24 09:13 Has this decoy been reviewed on the forum?

I have tested it before, but I didn't participate at that time. Now I drew one directly, and the result is that there is no output, not even 5V

蓝雨夜

Qintianqintian0303 posted on 2023-7-24 09:12 I am using the resistor configuration mode. It seems that I can directly configure CFG1 and select NC

All right!

I connect one resistor and two grounds.

秦天qintian0303

Blue Rain Night posted on 2023-7-24 09:22 Okay! I will connect one resistor and two to ground.

I'll try to change it, I can only keep trying

tagetage

Qintianqintian0303 Published on 2023-7-24 09:19 Single resistor configuration is suitable for applications where different requested voltages can be achieved by modifying the resistance value of the same PCB. CFG1 connects resistors to GND, with different resistance values...

Oh yes, I was negligent.

https://m.eeworld.com.cn/bbs_thread-1212804-1-1.html

See if this post can help you.

qwqwqw2088

The 20V resistor also needs attention

lkh747566933

I bought a 65W fast charger that claims to support PD and QC protocols, but it doesn't work at all and can only run at 20W.

秦天qintian0303

lkh747566933 posted on 2023-11-23 18:51 I bought a 65W fast charging head that claims to support PD and QC protocols, but it doesn't work at all and can only run at 20W

I can't tell you how to test it. Find an accurate testing tool.

lkh747566933

Qintianqintian0303 posted on 2023-11-24 08:54 I can't tell you how to test it. Find a more accurate testing tool

I have two specially bought power analyzers and plugged them in separately. Both show 20W.

秦天qintian0303

lkh747566933 posted on 2023-11-24 15:59 I have two specially bought power analyzers and plugged them in separately and tried them. Both showed 20W

Just go to the merchant and ask for a refund or exchange. If the product is not what you ordered, it won't work.

lkh747566933

Qintianqintian0303 posted on 2023-11-24 16:43 Just go directly to the merchant, either return or exchange, it won’t work if the goods are not the same as the ones in the picture

Yes, that's a must. I returned it at that time. Mainly because it was unusable. I bought it specifically to use as a PD charger.

秦天qintian0303

lkh747566933 posted on 2023-11-24 17:23 Yes, that's a must. I returned it at the time. It was mainly unusable. I bought it specifically to use as a PD charger

The Baseus fast charger I'm using now is pretty good, at least 20V can be output. I'll also test it to see what the maximum power is.

lkh747566933

Qintianqintian0303 posted on 2023-11-24 21:36 The Baseus fast charger I am using now is pretty good, at least 20V can be output. I will also test it to see what the maximum power is

Yes, I returned the product and bought a Baseus 65W GaN fast charging charger.