刚刚发布的Cree XLAMP MK-R是全新产品,其背后有一些令人印象深刻的规格,其中一个是1769LM @ 85C的最大输出。克里似乎无法休息。随着其主力阵容的各种更新,包括XP-E2,,,,XP-G2,,,,andXM-L2在过去的几个月中,他们经历了新的和更新的产品的繁忙一年。好吧,看来他们想在今年年底之前再溜走。
像他们所有的新产品一样,Cree也在其碳化硅技术上构建XLAMP MK-R。这是一个四边形的包裹,所有模具都在串联的所有模具中,均可在11.7V @ 700mA左右的典型前向电压。这将使获取高管腔密度的高度更容易,而无需像XM-L所需的那样具有高电流输出的驱动器。这就是产品公告中的基本数据真正结束的地方。
在查看公告后,然后将信息与数据表进行比较,事情变得令人困惑。关注他们在公告中提出的几点,您开始注意到差异。首先是200lm/w的主张,如果是真的,这是令人兴奋的。XM-L2是一种以186毫米/W的野兽,但这将其提升到了一个新的水平。问题是,在他们提出这些主张的最新和什么垃圾箱上并不明显。由于其最高垃圾箱以350mA驱动(效率将大于将其归纳的700mA),我们可以计算出的最好的垃圾箱约为168毫米/W,这与200LM/W的索赔相去甚远。将其丢弃至250mA(更容易推断的数据点),并且最多可达172LM/W,但仍然不足,并且不是这种类型的LED的实用驱动器电流。直到您实际驾驶1W(〜100mA)驱动LED之前,200毫米/W的图形才显示。因此,尽管他们确实达到了200 lm/w,但他们以某种方式对那些最终会使用它的人来说是不切实际的。
另一个奇怪的是LED的最大输出。公告钉在1769LM @ 1250mA上,这是一个了不起的数字,但是据我们所知,它基于J2箱,而不是稍后在DataSheet上列出的K2箱。J2在订购代码中列出,最大为6200K,但
the LED is supposed to be offered up to 8000K at some point, which is where some of the higher bins may start to show up. It’s speculation at this point, but it shows great promise for what this LED could do.
Beyond those two odd points, the rest of the LED details shape up nicely. In regard to thermal resistance, this is the best performing LED that Cree has produced yet. At 1.7C/W, this beats even the brand new XM-L2’s thermal resistance of 2.5C/W. That doesn’t sound like much, but at 15W, that’s only
a 25.5C delta between thermal pad and die temperature. The XM-L2 at 10W would see the same delta, and the venerable old XR-E (8C/W) would be seeing a 24C delta at only 3W! Don’t you love progress?
The rest of the MK-R LED is your standard fare. The package measures 7mmx7mm, with the dome creating a height of 4.8mm. This does mean that it’s not pad compatible with other popular LEDs. Viewing angle comes in at 120 degrees, and the thermal limit is still at 150C.
The MK-R should shape up to be an interesting LED for a variety of applications. For general lighting applications, like MR16 and PAR replacements, it will work nicely with it being easier to drive (higher vf, lower current), and high luminous density. For reefing applications, well, we don’t really have to explain
how well a 2000lm 7mm^2 LED will work, now do we? [Cree这是给予的