Ah, okay. I appreciate the correction. I struggle quite a bit to understand how components work when it’s something new in writing, I learn best visually.
Now I realize that the driver I’m after is one that has stabilization, would that be constant current or something else? What we see usually on boost drivers.
Tom E, you may want to fix the nicknames back there: if the NM1 and PM1 are Wn, where n = die area in mm², then the Boost HL and HX which are their bigger footprint counterparts should be dubbed Wn.something, W1+ for the KW CULNM1.TG and W2+ for the KW CULPM1.TG, for example. You could also add some proper, simple surnames to the color variants for the sake of simplicity (just remember that the pure green is the phosphor converted green, with some CRI, despite being listed with a narrow frequency window versus the true green).
It’s a small indutance value of 0.47uH, the smaller the inductance the smaller the DCR usually, which is another reason you want a small inductance value in such small place, to actually minimize DCR at high currents.
Still it is small inductor, low profile, I cannot imagine constant current at 8A, for lower currents like 3A surely no problems. I would like to see a review with a flashlight, without artificial active cooling.
Otherwise it seems to look good for example appears like a couple of external FETs rather than integrated into the switching IC.
Don't think it's the best, but thought Hank was following other conventions.
I'm keeping this is a Word docx file for now. Will make it public when it's more finalized. I've learned a few things since putting this together. The different flavors always had me confused somewhat. For white, looks like the Boost HL and Boost HX are making the old W1 and W2's obsolete, except for the pricing.
In all honesty, I find hardly believable that going from 3030 to 4040 footprint can provide much of a performance gain for emitters so small die size wise. And mind you, there are 0 actual tests of the 4040 emitters; just a lot of gossip. A good emitter bin can make a much bigger difference in practice.
In any case let me tell you these are being sold fairly expensive right now, in my opinion of course. And you know why.
Gossip? Hank has #'s for his K1. I received yesterday 2 K1 drivers and 1 Boost HL on a 32 mm 4040 MCPCB. Not sure yet where it's gonna go though - think'n of a BOSS1 (100 mm head diam reflector light). I'm not setup or have the time for testing the LED though.
Not sure why you think I might have that wrong. The one I received is a small square LED surface on a 4040 MCPCB, so really can only be the Boost HL, which apparently beats the Boost HX in throw in the K1. Not to say the amps are properly maximized, but I don't think Hank will make claims of kcd without measuring it.
You are talking about a Boost HX, not Boost HL, is that right? I have a Boost HL - it beats the Boost HX in the stock K1 (650 kcd for the HL, 600 kcd for the HX).
Boost HL is the smaller square dye, while the HX is the bigger rectangular dye.
I see - looks like Simon only sells the Boost HX, not the Boost HL. With Hank in the K1 you have a choice of either (and if you ask patiently, he may sell you a mounted LED, whichever one you request ).
SkyLumen was the first to use the WF1/2/1.1/2.1 name format AFAIK, and honestly it makes a lot of sense IMO. I have to look up the actually model numbers half the time I see people discussing them to remember which is being referenced.
I was asking because I didn’t know anyone still had HLs for sale. I’ve been looking for one for since LED4P went oos and Osram obsoleted the model. I’ll get one before they’re gone…
Also, if Hank is calling them W2.1, that would be opposite naming convention from what I am familiar with. Typically (Vin/Skylumen), the ‘.1’ extension indicates the newer/upgraded 4040 package, while the W (n) still denotes the emitting surface area. So the HL would be a W1.1 in Vin shorthand, and HX= W2.1
Seems like Hanks naming convention is different, which will add to the confusion with these letter soup Osrams.
Of course he doesn't say what these LED's are, that I can find.
On BLF, Hank and his lights are far more popular than Vinh (sheer volume) so I'd stick with Hank's, unless Hank can be convinced to change his naming convention.
Yeap, Vinh has limited audience where Hank is widely known so yes, i agree with Tom.
Adding bypassed wire at the spring on somebody else’s design doesn’t make you refference in this business.