TR-0124 14-66W 5-Mode LED Flashlight Driver for Luminus SST-90
Driver is from Fasttech.com.
- Product Type: Flashlight Driver
- Material: Circuit Board + Copper
- Input Voltage: 3-13 -volt
- Output Current: 4900-5100 mA
- Reverse Polarity Protection: Yes
- Flashlight Modes: Hi > Mid > Lo > Strobe > SOS
- Mode Count: 5
- Mode Memory: Yes
- Power Consumption: 14-66 W
- Depth: 28 mm
- Diameter: 32 mm
Tested with: SST-90
Driver uses buck converter.
Modes: High, medium, low, strobe, sos
Light has mode memory.
A fast off/on will change to next mode.
Medium uses pwm at 125Hz and 42% duty cycle
Low uses pwm at 125Hz and 9% duty cycle
Strobe is 8Hz with 50% duty cycle
The name of this driver is a bit misleading, it "only" uses up to about 25 watt, not 66 watt.
The driver keeps the brightness fairly stable from 4 volt to 13 volt input, but at the lower voltages it does not works as smooth as at higher voltages.
The driver needs some cooling, it has to get rid of between 3 watt and 5 watt. Looks like the driver changes mode somewhere between 5.5 and 6.0 volt.
The driver starts up below 3 volt and when the voltage increases it looks like the mode change happens at a higher voltage.
The output has some high frequency noise in it.
To reduce brightness the driver uses pwm, this means that the actual curves will be close to the high curves, just with less current.
The pwm frequency is about 125Hz.
Low is using pwm at the same frequency and again the general shape of the curves looks like high, but with lower average current.
The efficiency goes down, because the driver needs about the same power for itself as it does on high.
The duty cycle is down to 9%.
Strobe is at 8Hz with full brightness (As expected from a pwm driver).
I am not impressed with the efficiency and I do also have something agains the bumps in the performace at lower voltage. It would have been nice with a low voltage warning.
Some people will not like the low pwm frequency.
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