...thanks but i thought your first explanation was more accurate...i.e. the reel code only tells you that the leds on that reel are Vf binned, and could be in any one of three voltage bins.....but you have no way of knowing which voltage bin that is?
Yes i agree with you, single forward voltage can't be orderable, this is our case we are working with OSRAM, and it is not possible to order one forward voltage, but you order with the part number that include 4 forward voltage, and when you will receive reel, you will found that OSRAM put the forward voltage BIN on the reel.Sorry i disagree, with osram you do not know what voltage bin you have , as the datasheet tells it.......
The problem for procuring several reels of LEDs from the same voltage bin is demonstrated with the “LS E63B” Power TOPLED from Osram-os.com…
“LS E63B” LED datasheet:
**broken link removed**
Quoting from page 2 of this datasheet:-
“In a similar manner for LED, where forward voltage groups are measured and binned, single forward voltage groups will be shipped on any one reel. E.g. LA E63B-CBEA-24-1 means that only 1 forward voltage group -3A, -3B, -4A or -4B will be shippable. In order to ensure availability, single forward voltage groups will not be orderable (see page 5 for explanation).”
Thats quoting from the datasheet
Sorry i disagree, with osram you do not know what voltage bin you have , as the datasheet tells it.......
That defies logic! I've been in electronics all my life and never heard of the term.
Try search for "product binning". Plenty of results. Wikipedia even has a short article on it.Google for 'define bin' and you won't find a definition...
I suspect all his emails get routed straight to the spam folder. Changing his name and email address might work for a while, but bombarding manufacturers with endless simple repetitive questions isn't a winning strategy in the long term.I don't actually understand this kind of communication desaster...
and when you will receive reel, you will found that OSRAM put the forward voltage BIN on the reel.
By the bin code printed on the reel, you know what you have,
bombarding manufacturers with endless simple repetitive questions isn't a winning strategy in the long term
Why? There's an part code and a bin code, as the datasheet shows. Different bins have the same part code, so you can't order by bin code.if the particular forward voltage group was marked on the reel then you would be able to order specific Vf groups
High-Efficiency White XLamp LEDs are additionally binned into forward voltage bins.
[snip]
LEDs are shipped on reels containing LEDs from
one bin and are always labeled with the appropriate bin code.
Page 14 of the OSRAM datasheet clearly shows the forward voltage code marked on the label.Sorry i disagree, with osram you do not know what voltage bin you have , as the datasheet tells it.......
clearly shows the forward voltage code marked on the label.
Which part of "forward voltage" don't you understand?
See the example on page 5:where on that label does it give a specific label for a single forward voltage group? (e.g. "3A" or "3B")
Now we're back to square one. What makes you think they're twice as expensive?Also, does anyone know why people use matched leds, matched on vf, when they are twice the price of non matched leds?
For crying out loud, it's an example of the code that is printed on the label.i saw the example on page 5...but page 5 is not a label on a reel.
......Thanks, could you provide any indication of how much cheaper "no bin criteria" can be?No bin criteria is always the cheapest ( not lowest voltage)
..........What would the MOQ have to be in order for a distributor to give bin costs?If you can't find a distributor who can supply answers to bin costs then I'll show you a client with insufficient demand.
What you quoted in post 22 refers to the order code, not the label.Godfrey, my post #22 tells that you won't be able to know from the reel code which vf bin is on that reel.
Group Name on Label
Example: DA-4-3A
The reel label does specify a Vf bin.
In a similar manner for LED, where forward voltage groups are measured and binned, single forward voltage groups will be shipped on any one reel. E.g. LA E63B-CBEA-24-1 means that only 1 forward voltage group -3A, -3B, -4A or -4B will be shippable. In order to ensure availability, single forward voltage groups will not be orderable (see page 5 for explanation).”
Yes, I just take that at face value, assuming they mean what they say.as you clearly point out, according to page 5 the label code gives the precise Vf group...........but, page 2 (bottom) states clearly that individual vf groups cannot be ordered.
Ideally yes, but they don't seem to work that way. Perhaps they're concerned that if they allowed everybody to order specific bin codes, then they'd keep running out of stock of the more popular ones, while sitting with a warehouse full of the less popular ones nobody asks for.If the Vf code genuinely appeared on the reel label, then clearly, that vf group would indeed be orderable.
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