Test/Review of Blitzwolf 4 port QC2 car charger BW-C5

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HKJ
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Test/Review of Blitzwolf 4 port QC2 car charger BW-C5

Blitzwolf 4 port QC2 car charger BW-C5
DSC_3360
Official specifications:


  • Input: DC 12-24V (Max)
  • QC 2.0 Output: 5V/2A, 9V/2A, 12V/1.5A (Max)
  • USB Port Output: 3*5V/2.4A
  • Power: 54W
  • Size: 86.7mm*45mm*21mm(3.41*1.77*0.83in)
  • Brand: BlitzWolf®

I got it from Banggood
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Blitzwolf uses a brown cardboard box without much text on the outside.
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The box contained the charger and a note.
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The QC output is the green usb connector.
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Measurements


  • Power consumption when idle is 0.06 watt at 12V and 0.12 watt at 24V
  • The usb 3 outputs are in parallel.
  • The 3 usb outputs are auto coding with Apple 2.5A as maximum.
  • The QC output is also auto coding in addition to QC
  • No individual port overload protection.
  • The QC output is turned off shortly when dropping down to 5 volt.
  • There is a blue led hidden between the middle two usb ports.

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Load%20sweep%2014.6V%20%234
Load%20sweep%2024.0V%20%234
There is not much difference with varying input voltage, except 24V has lower efficiency. There is no individual port protection.
Load%20sweep%2011.6V
Load%20sweep%2014.6V
Load%20sweep%2024.0V
Running all 3 outputs in parallel there is a common overload protection at 8.5A, the lower efficiency for 24V disappears at higher load.
Load%20sweep%2011.6V%20QC5V
Load%20sweep%2014.6V%20QC5V
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The QC output has protection, but at a fairly high level for a single port.
Load%20sweep%2011.6V%20QC12V
Load%20sweep%2014.6V%20QC12V
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The QC 12V output is supposed to deliver 1.5A, it can easily do that and a lot more. At around 2.75A it drops out of 12V quick charge.
Voltage%20sweep%207.2A%20input%20current
With 7A output it needs about 1.5A at 24V and 3A at 12V.
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Output voltage is very stable with changing input voltage.
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Idle current is about 6mA.
Load%20test%207.2A
Temp2884
M1: 66,1°C, M2: 66,1°C, M3: 52,6°C, HS1: 67,4°C
Temp2885
M1: 60,4°C, M2: 47,1°C, HS1: 61,9°C
10ohm
At 0.5A with 12V input the noise is 5mV rms and 140mVpp.
5ohm
At 1A with 12V input the noise is 5mV rms and 130mVpp.
2ohm
At 2.5A with 12V input the noise is 4mV rms and 104mVpp.
0.7ohm
At 7A with 12V input the noise is 5mV rms and 94mVpp.
2ohmqc
At 2.5A quick charge with 12V input the noise is 5mV rms and 117mVpp.
10ohmqc12V
At 1A with 12V input the noise is 7mV rms and 79mVpp.
Tear down
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The top and bottom could be removed, the circuit board had a little bit of glue I had to break before I could remove it.
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As expected there is two inductors: One for the 3 normal usb output and one for the quick charge output. The chip partial hidden under the metal is the QC2 controller (F75299).
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There is hidden a dual buck controller (TPS51220) under the capacitor and a transistor under the inductor.
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There is not much interesting stuff on this side of the circuit board. A 0.01 ohm resistor (R010), this must be current sense.
Notice the circuit board trace where the wire is connected, the squiggle is supposed to be a fuse.
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Notice the led between the usb connectors.
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U2 is one of the auto coding chips.
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Here a corner of the other auto coding chip can be seen.
Being a 12/24V device there is no need to test with high voltages.
Conclusion
This is a car charger with four high power usb ports that will charger just about any usb device as fast as possible. With one port supporting QuickCharge it can charge some pads and phones extra fast. The only negative detail is that all ports are in parallel without any individual protection.
I will call it a good charger (If each output had been limited to about 3A I would have called it very good).
Notes
The usb charger was supplied by Banggood for a review.
Read more about how I test USB power supplies/charger

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

Jinx
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Great review as usual. I can’t recall if many of these car chargers usually accept 24v, if not then this one will be popular with the truckers out there.

Also handy for use as a mobile charger off of a small battery bank/solar setup as the adaptors on small fly leads cost next to nothing.

Grieflar
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Thanks a lot fellow Scandinavian. Been interested in how these really perform for a while Smile

Gotta love the Swedish postal service – $9 added to every package from China…

agent80
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Great review as always!

HKJ
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Jeansy wrote:
Great review as usual. I can’t recall if many of these car chargers usually accept 24v, if not then this one will be popular with the truckers out there.

It looks like many do support 24V, but not all. This one is good for anyone having multiple devices in the car.

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

lagman
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Thanks, however something is clearly wrong with the wattage curves.

My English isn’t perfect but I’m trying to improve it. If you see something that doesn’t sound right or is just plain wrong, please feel free to point it out! Smile

HKJ
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lagman wrote:
Thanks, however something is clearly wrong with the wattage curves.

What? It is power loss in the charger (Look at the labelling below the charts).

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

will34
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Interesting, it works most efficiently at lowest and highest input voltages… Edit: the other way around…

HKJ
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will34 wrote:
Interesting, it works most efficiently at lowest and highest input voltages… Edit: the other way around…

There is a couple of factors that give looses, the question is how they balance out:
High current will give looses due to ohmic resistance.
Larger voltage conversion will give larger looses.
Internal power supply will have a minimum power usage, this will always give low efficiency at low loads.
Internal power supply will often loose efficiency at higher input voltage

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

lagman
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HKJ wrote:
lagman wrote:
Thanks, however something is clearly wrong with the wattage curves.

What? It is power loss in the charger (Look at the labelling below the charts).


Oh ok. I didn’t see the labelling and thought this watt curve must have been the power delivered to the load.
My mistake.

My English isn’t perfect but I’m trying to improve it. If you see something that doesn’t sound right or is just plain wrong, please feel free to point it out! Smile