Test/Review of 17.5mm CC 1600mA LED Driver 4 Mode, 3.6-8.4v

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HKJ
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Test/Review of 17.5mm CC 1600mA LED Driver 4 Mode, 3.6-8.4v
17.5mm CC 1600mA LED Driver 4 Mode, 3.6-8.4v

DSC_4915 DSC_4916
DSC_4917 DSC_4918

Driver is from lck-led.com

Official specifications:
  • Current regulated at 1.6A
  • Input voltage 3.6V-8.4V,
  • Measures 17.5mm in diameter, and 7mm in height
  • Multi-Mode: High/Mid/Low/Strobe
  • Designed for XM-L, MCE, SSC P7
  • 1xLED+, 1xLED-
  • Prewired, ready to use




Measurements

Type: DUP-K1
Tested with Cree XP-G2 led
Diameter: 17mm
Height: 5.8mm
Driver is a buck driver.
Modes: High, medium, low, strobe.
A short off/on selects next mode.
Driver does not have memory
Medium is pwm at 970Hz with 50% duty cycle
Low is pwm at 970Hz with 10% duty cycle
Strobe is 12Hz with 40% duty cycle

With this pwm driver the efficiency calculations are good between 5 volt and 8.4 volt for the pwm modes, high is good down to 3.4 volt.



High

17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20HL

This driver has a bump around 4.5 volt and drops fast below 3.9 volt. The best range is above 4.7 volt and up to 8.4 volt where the output is very stable.
It looks like the best configuration for this driver is with two LiIon cells or four NiMH cells.

17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20HLDriver
17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20HLLed

17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20LH

Increasing the voltage for zero volts shows that the driver starts at about 3.4 volt.

High

The high output is without any pwm, only a small about of high frequency noise from the buck converter.

High%20at%204.5V

Around 4.5 volt the driver does strange things. The driver jumps up and down in brightness at a fast frequency.



Medium

17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20medium%20HL

Reducing the brightness works exactly the same (Not really a surprice with a pwm driver).

17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20medium%20HLDriver
17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20medium%20HLLed

Medium

The driver uses pwm at 970Hz with a 50% duty cycle to reduce brightness.



Low

17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20low%20HL

Low is again the same, except the dive in brightness has moved to a slightly higher voltage.

17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20low%20HLDriver
17.5mm%20CC%201600mA%20LED%20Driver%204%20Mode,%203.6-8.4v%20low%20HLLed

Low

At low the pwm duty cycle is down to about 10%, this is not a very low selection for low.



Strobe

Strobe

Strobe is at full brightness and is fairly fast at 12Hz, it has a 40% duty cycle



Conclusion

The driver looks like a good driver as long as it has voltage enough.
The 1kHz pwm is also a good value, it is high enough to mostly avoid flicker and low enough to only have a minor impact on efficiency.



Notes

I am not very impressed with lck-led's custom service. I got one wrong driver and one driver that was far outside specifications. I have sent a couple of emails to them, I got one question back after two weeks: did I want money back or a new driver. There was no explanation if it covers one or both of the problems and I do not know if they have sent me a new driver (That was my answer).

How do I test a led driver
List of all tested drivers

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

koyotee
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Joined: 11/22/2012 - 11:12
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Thanks for the review!
Btw, i think you have a high enough reputation with your tests, that vendors should send you FREE samples to test. Especially, if they are worth pennies!!!

Finaly, proud owner of a Powerex Maha mh c-9000 for my Eneloops:)

HKJ
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koyotee wrote:
Btw, i think you have a high enough reputation with your tests, that vendors should send you FREE samples to test. Especially, if they are worth pennies!!!

Usual I do not ask for free samples, I just order if I want to test something.

With chargers and batteries I do get many free samples.

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

djozz
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Thanks for the review, HKJ

The soldering on this driver suggests that its components are all soldered by hand, is there a possible situation that that is cheaper than reflowing???

Question, I do not know much about electronics: would this driver also provide the 1600mA at 6V ? (thinking of a modest MT-G2-build)

HKJ
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djozz wrote:
The soldering on this driver suggests that its components are all soldered by hand, is there a possible situation that that is cheaper than reflowing???

Only where low production numbers.

djozz wrote:
Question, I do not know much about electronics: would this driver also provide the 1600mA at 6V ? (thinking of a modest MT-G2-build)

It might, but it depends on the specifications of the used chips and the actual implementations.

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

RaceR86
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Location: Norway

Thanks for the review..

I usually try to avoid LCK-LED.. Good customer service and quick responses does not seem to be in their nature.

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