USB Electronic Load Tester

[Chris March 19, 2018 at 3:34 pm Post count: 0]

#29563 Reply |

Hi,

I posted the below comment in another section of the forum but I’m not sure if went through so I’ll try it here. Please see the following regarding my experience with the USB electronic load tester:

I just purchased 6 Drok electronic loads from your Amazon store.

https://www.amazon.com/DROK-Multimeter-Capacity-Electricity-Temperature/dp/B01FHBSTYU/ref=sr_1_8?s=lamps-light&ie=UTF8&qid=1521228040&sr=1-8&keywords=drok

According the product description section on the above Amazon website, this electronic USB load tester is compatible with any USB adapter or USB power source that is Qualcomm quick charge 2.0 compliant.

However, when I connect the electronic load to a certified Qualcomm Quick Charge 2.0 USB power adapter the meter shows only 5V at whatever current I set the electronic load too which in my case is 2.0 Amps.

What I expect to happen is that the electronic load will detect the quick charge function in the connected USB adapter and then automatically switch to the highest Voltage level supported by the USB adapter power source.

I’ve tested the Drok electronic load with three different Qualcomm certified USB adapter power sources and in each case the result is the same on the OLED display of the electronic load. Only 5V at 2A.

How do I get this electronic load to work with a quick charge adapter at the higher output Voltage levels?

Please advise.

Thanks and best regards,

Chris.

[Chris March 20, 2018 at 3:00 pm Post count: 0]

#29567 Reply |

Hi Drok,

Please help with the electronic load question above. If I can’t get these Drok electronic loads to work with Quick Charge 2.0 then I’ll have return them all which I really don’t want to do.

Please advise.

Thanks and best regards,

Chris.

[DrokKeymaster March 23, 2018 at 8:08 am Post count: 2971]

#29571 Reply |

Hello Chris,
We noticed your question on another section of forum, so we have replied to you there.
Can you see our response?
Any questions, please let us know.
Best regars.

[Chris April 2, 2018 at 3:56 pm Post count: 0]

#29595 Reply |

Hi,

Thanks for the reply. I know I posted the question in another section of the forum but I’m unable to locate that post. Would you please re-post your fully reply here or send the link to where you posted in the forum.

Greatly appreciate the help.

Best regards,

Chris.

[DrokKeymaster April 3, 2018 at 6:47 am Post count: 2971]

#29597 Reply |

Here is the link. http://droking.com/cs/2015/12/16/digital-acdc-multimeter-4-data-display-voltage-current-power-energy/

• This reply was modified 6 years, 7 months ago by  Drok.

[Chris April 5, 2018 at 3:45 pm Post count: 0]

#29608 Reply |

Hi,

Thanks for reposting your original response.

So that my understanding is correct, the Drok electronic load is not a “stand alone” device when testing a USB power supply that supports quick charge. I would need to connect another device in parallel to the Drok electronic load that can tell the USB power source to enter quick charge mode?

If that is the case, please consider adding stand alone quick charge support to the electronic load. It can be done with an MPU monitoring D- and the addition of resistors and a few transistors to re-create the conditions for an external power source to recognize the electronic load as quick charge compliant. Would add lot’s of value to this device.

Thanks and best regards,

Chris.

[DrokKeymaster April 6, 2018 at 7:31 am Post count: 2971]

#29610 Reply |

Hi Chris,
The trigger we mean is like this one:
https://www.amazon.com/Automatic-Voltage-Current-Charger-Trigger/dp/B075LHFHQ3/ref=sr_1_1?ie=UTF8&qid=1522999084&sr=8-1&keywords=B075LHFHQ3
It is used to induce qc2.0/3.0 device to output high voltage. Please do not use it to charge phone directly.
Best regards.

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