Good driver or regulator for 4 Luxeon 3 watts ?
- Thread starter elfen1
- Start date
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andrewwynn
Flashlight Enthusiast
Why parallel? in series the lights will work nicer. If you are using 4D.. that's 6V.. i think you can run series luxes from a fatman driver, but maybe not 4 of them.. you could do it with 2 parallel fatman drivers but that's pricy... a lot of people use 4AA->D converters to get a base voltage higher than the emitters Vf and then you can use the likes of the nFlex driver for 8-levels of brightness with digital control.
AuroraLite
Enlightened
Hmm...I am not an EE person, but running in parallel wouldn't it mean the driver had to put out 900max4 or even 4A of current? If that 4A of current had to be some what regulated, does it imply the possible 4A+ current drawn from the battery source?
I do know with enough cells giving enough voltage, 4 lux III in series(individually 1A driven), should be totally possible(just as Andrew said) with nflex.
I do know with enough cells giving enough voltage, 4 lux III in series(individually 1A driven), should be totally possible(just as Andrew said) with nflex.
idleprocess
Flashaholic
The fatman isn't rated for 4x Luxeon III.
I've been working on a project using a fatman & 3x Luxeon IIIs. Here are some of the scenarios:
8x NiMH cells (500mA/1000mA)
<font class="small">Code:</font><hr /><pre> CELLS
Load Best Worst %Eff
==== ==== ==== ====
V 3.50 1.20 0.90 0.85
Qty 3 8 8
Vsum 10.50 9.60 7.20
L Current 500.00 643.38 857.84
L mW 5250.00 6176.47 6176.47
H Current 1000.00 1286.76 1715.69
H mW 10500.00 12352.94 12352.94
</pre><hr />
4x NiMH cells (500mA/1000mA) this won't work because supply current exceeds the maximum of 2.5A:
<font class="small">Code:</font><hr /><pre> CELLS
Load Best Worst %Eff
==== ==== ==== ====
V 3.50 1.20 0.90 0.85
Qty 3 4 4
Vsum 10.50 4.80 3.60
L Current 500.00 1286.76 1715.69
L mW 5250.00 6176.47 6176.47
H Current 1000.00 2573.53 3431.37
H mW 10500.00 12352.94 12352.94
</pre><hr />
4x NiMH cells (350mA/700mA) safer than 500/1000, but you'll be cutting it close at the tail end of cell life:
<font class="small">Code:</font><hr /><pre> CELLS
Load Best Worst %Eff
==== ==== ===== ====
V 3.50 1.20 0.90 0.85
Qty 3 4 4
Vsum 10.50 4.80 3.60
L Current 350.00 900.74 1200.98
L mW 3675.00 4323.53 4323.53
H Current 700.00 1801.47 2401.96
H mW 7350.00 8647.06 8647.06
</pre><hr />
I've been working on a project using a fatman & 3x Luxeon IIIs. Here are some of the scenarios:
8x NiMH cells (500mA/1000mA)
<font class="small">Code:</font><hr /><pre> CELLS
Load Best Worst %Eff
==== ==== ==== ====
V 3.50 1.20 0.90 0.85
Qty 3 8 8
Vsum 10.50 9.60 7.20
L Current 500.00 643.38 857.84
L mW 5250.00 6176.47 6176.47
H Current 1000.00 1286.76 1715.69
H mW 10500.00 12352.94 12352.94
</pre><hr />
4x NiMH cells (500mA/1000mA) this won't work because supply current exceeds the maximum of 2.5A:
<font class="small">Code:</font><hr /><pre> CELLS
Load Best Worst %Eff
==== ==== ==== ====
V 3.50 1.20 0.90 0.85
Qty 3 4 4
Vsum 10.50 4.80 3.60
L Current 500.00 1286.76 1715.69
L mW 5250.00 6176.47 6176.47
H Current 1000.00 2573.53 3431.37
H mW 10500.00 12352.94 12352.94
</pre><hr />
4x NiMH cells (350mA/700mA) safer than 500/1000, but you'll be cutting it close at the tail end of cell life:
<font class="small">Code:</font><hr /><pre> CELLS
Load Best Worst %Eff
==== ==== ===== ====
V 3.50 1.20 0.90 0.85
Qty 3 4 4
Vsum 10.50 4.80 3.60
L Current 350.00 900.74 1200.98
L mW 3675.00 4323.53 4323.53
H Current 700.00 1801.47 2401.96
H mW 7350.00 8647.06 8647.06
</pre><hr />
