Test/review of Qihang QC3.0 Quick Charger Z05

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HKJ
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Joined: 05/24/2011 - 12:23
Posts: 7427
Location: Copenhagen, Denmark
Test/review of Qihang QC3.0 Quick Charger Z05

Qihang QC3.0 Quick Charger Z05
DSC_1669
Official specifications:


  • Input voltage: 100-240V
  • Output: 5V 3A, 9V 2A, 12V 1.5A
  • Charger is marked: QH-Z06

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It arrived in a partial transparent plastic box.
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Measurements


  • Power consumption when idle is 0.06 Watt
  • USB output is auto coding with Apple 2.4A, Samsung, DCP
  • Minimum QC3 voltage is 3.8V
  • Weight: 46.3g
  • Size: 80.4 × 39.1 × 27.1mm

Qihang%20QC3.0%20Quick%20Charger%20Z05%20QC5V%20230V%20load%20sweep
The overload protection at 5V trips at 4A, this is well above the rated 3A
Qihang%20QC3.0%20Quick%20Charger%20Z05%20QC9V%20230V%20load%20sweep
At 9V it is down to 2.6A
Qihang%20QC3.0%20Quick%20Charger%20Z05%20QC12V%20230V%20load%20sweep
And at 12V it is about 1.9A
Qihang%20QC3.0%20Quick%20Charger%20Z05%20QC12V%20120V%20load%20sweep
At 120VAC is can deliver slight more current.
Qihang%20QC3.0%20Quick%20Charger%20Z05%20QC9V%20230V%20load%20test
The charger could deliver 9V at 2A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.
Temp7345
M1: 52.7°C, HS1: 71.2°C
HS1 is transformer.
Temp7346
HS1: 57.2°C
Temp7347
HS1: 65.4°C
Temp7348
M1: 74.4°C, HS1: 76.0°C
Temp7349
M1: 51.2°C, HS1: 71.7°C
10ohm
At 0.5A the noise is 46mV rms and 1200mVpp.
5ohm
At 1A the noise is 197mV rms and 1262mVpp.
2ohm
At 2.5A the noise is 80mV rms and 1332mVpp.
10ohmQC9V
At 0.9A the noise is 75mV rms and 1456mVpp.
10ohmQC12V
At 1.2A the noise is 97mV rms and 1553mVpp.
Tear down
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Mounting the base in my vice I could break the top off with my mallet.
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At the input is a fusible resistor (FR1), it has the usually safety capacitor (CY1) between mains and low volt side and it has opto feedback (Placed below CY1).
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On this side is the bridge rectifier (BD1), the mains switcher (ATC9560) and on the low volt side a large rectifier diode (D3: DK5V100R25C), the QC controller (U4: LP103S) and the voltage reference (U3).
DK5V100R25C
The diode is not really a diode, but a synchronous rectifier
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The distance between mains and low volt must be 4mm over a slot and above 6mm on the circuit board, this charger is below on both counts.
The charger passed the 2830 volt test, but failed the 4242 volt test between mains and low volt side, this makes it unsafe for 230VAC countries.
Conclusion
The charger is a fairly standard QC3 charger with enough output power and good efficiency, but there is a safety problem, the isolation between mains and low volt side is not good enough.
Notes
The USB charger was supplied by a reader for review.
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

MRsDNF
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Joined: 12/22/2011 - 21:18
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Location: A light beam away from the missus in the land of Aus.

Thanks HKJ. Beer

 

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Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.