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參數(shù)資料
| 型號(hào)： | UPWLEDLPGBS |
| 廠商： | MICROSEMI CORP-LOWELL |
| 元件分類： | LED |
| 英文描述： | SINGLE COLOR LED, HIGH BRIGHT WHITE, 1.47 mm |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 337K |
| 代理商： | UPWLEDLPGBS |
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Microsemi
580 Pleasant Street, Watertown, MA. 02472-2408, 617-926-0404, Fax: 617-924-1235
Page 5
Copyright
2002
Rev 3 2003-05-23
WWW
.Microse
m
i
.CO
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UPWLEDLPxxx
HIGH BRIGHTNESS WHITE LED
PRODUCT PREVIEW
Adjusting dc drive current to accommodate a desired Luminous Intensity:
The equation to determine the dc drive current required to produce a desired Luminous Intensity for the Intensity
Rank H is given below. The graphic for the Rank H is shown:
dc Drive Current as a function of Luminous Intensity
0
75
150
225
300
0
10
20
30
40
50
Luminous Intensity (mcd)
dc
Drive
Current
(ma)
ID = m x IV + b where m = 0.17, b = -2.512, IV is the value of Luminous Intensity in milli-candela
Example: Determine the dc Drive Current required to produce a nominal Luminous Intensity of 200 mcd.
ID = 0.17 x 200 – 2.512 = 31.5 ma
The resulting power dissipation is: ~110mW (Read the forward voltage from the “L” graph of ID vs VF)
The junction temperature rise is less than 20°C above ambient (see junction temperature rise graph).
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