19mm CC 3000mA LED Driver 3 Modes, 5.5-12v, XM-L,SSC P7,MC-E








Driver is from lck-led.com

Official specifications:

• Current regulated at 3.0A
• Input voltage 5.5V-12V, (no more than 12V would be the best option for protection of LED board according to accurate test)
• Buck Voltage Current Regulated circuit
• Gives 80%~94% efficient output
• Measures 19mm in diameter, and 8mm in height
• Multi-Mode: Low(5%)/High(100%)/Middle(35%)
• Designed for XM-L, SSC P7 & Cree MC-E LED for maximum output 300lumen-900lumens(C bin), 900-1000LM of Cree XM-L
• 1xLED+, 1xLED-
• Prewired, ready to use

Output Voltage:
2.8A(High)~ 1.38A(Middle)~0.25A(Low) --at any voltage level from 5.5V to 13.2V---Current regulated
Caution: No more than 3 D-size Li-ion Batteries (4.0V~12.0V) for protection this LED board,When overheat, automatically switch to Low mode, and flash one time per 5 seconds. When return to safe temperature, automatically switch to previous mode.



Measurements

Type: LDV9
Diameter: 19mm+21mm
Height: 10mm
Tested with XM-L2 (And it did survive).
The driver is not a 3A driver, but a 5A driver!
Driver has memory
A short off/on will change to next mode.
Modes: Low, medium, high
Medium uses pwm at 1kHz with 30% duty cycle.
Low uses pwm at 1kHz with 5% duty cycle.



High



The driver needs about 5.5 volt before the output is stabilized, but it does not stabilize at 2.8 or 3A as the specifications says, it delivers 5A to the led.
The efficiency is also lower than specified, probably because of the higher current.
The low voltage warning activates at 5.5 volt.







When slowly increasing the voltage, the driver turns on at about 4.8 volt and goes out of low voltage warning at about 5.7 volt.



There is no pwm in high mode, only some high frequency noise.



When the driver gets hot is uses pwm to reduce output.



Low voltage is signalled by two fast off then 5 seconds low light.



Medium



In medium the average led current is about 1.5A. The low voltage warning activates at 5.6 volt.






For medium the driver uses a 1kHz pwm with 30% duty cycle.



Low



In low the average current is about 0.2A (Remember due to pwm the actual current is 5A, but only in short pulses).






For low the driver uses a 1kHz pwm with 5% duty cycle.



Conclusion

The driver works fine and the heat warning is a nice feature.
But the high current has a great risk of damaging the leds, the current must either be reduced or the driver must be used for leds with higher current rating.



Notes

I am not very impressed with lck-led's custom service. I got one wrong driver and one driver that were far outside specifications (This one). 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).


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