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本帖最后由 xxc3235797 于 2010-6-11 23:03 编辑
看来 比SST小不少哦
貌似是2*2mm的核心 不知道对不对？
我来替 探照灯兄 转运下 在座的兄弟 谁"E"文好 能不能帮忙代 译 一下
Preliminary overview of the Cree XLamp XM-L LED from general information released at Light Fair 2010.
The XM-L LED is built on the XP-C/E/G format style in a slightly larger size. The outside dimensions are
5.0 mm by 5.0 mm as apposed to the XP size of 4.0 mm by 4.0 mm. The die size is 2.0 mm by 2.0 mm
with 5 internal bars surrounded by a border in witch the bonding wires are attached. The XP-G has 4 bars
and the XP-C/E has 3 internal bars with the same border attachment points. The substrate thickness
should be the same as the smaller LEDs in the family.
Output is stated to be 160 Lumens at 350 mA current at 2.86 volts. And at 2 Amps the output is 750
Lumens at 3.4 volts or 110 Lumens per watt. Since the XP-G current was raised to 1.5 Amps from 1 Amp,
it will be safe to assume that the current input limit for the XM-L will be at least 2.5 Amps for an output
of 900 Lumens. Actual current limit may be slightly higher depending on the number and/or size of the
bonding wires. At 2 degrees C per watt the thermal efficiency is very good; however the power limit may
also be restricted by the very small footprint that concentrates the heat in a restricted area. Good
thermal management design of the flashlight heat sink will be required for higher outputs.
The output should work well with most solid optics and with reflectors that work with the XP-E/G LEDs,
the Seoul P4 and the older Lux III/K2 LEDs. The output angle will most likely be slightly greater than
that of the smaller die LEDs. The difference will be made up by the increased output of the XM-L vs.
that of the XP-G LED, so the throw may be the same with more side spill at the same drive levels. At
one Amp the output is 430 vs. 350 Lumens and at 1.5 Amps it is 610 vs. 460 Lumens. |
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楼主: toud
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发表于 2010-6-11 17:12
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