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参数资料
| 型号： | SML-211UTT86G |
| 元件分类： | LED |
| 英文描述： | SINGLE COLOR LED, RED, 1.4 mm |
| 封装： | 2 X 1.25 MM, 0.80 MM HEIGHT, MINIMOLD PACKAGE-2 |
| 文件页数： | 7/7页 |
| 文件大小： | 548K |
| 代理商： | SML-211UTT86G |
IF peak Max.
IF Max.
21
LED lamps
Determine the pulse drive conditions as follows.
1. Decide what repetition frequency (f) and duty factor
(DF) will be used.
2. Determine the maximum tolerable peak current ratio
from Figure 2.
3. Determine the maximum forward current from
Figure 3.
For example, when Ta = 40
_C or above, the maximum
forward current (IF Max.) decreases.
4. Calculate the maximum tolerable peak current (IF
peak Max.).
Example
If f = 1 kHz, DF = 10%, and Ta = 40
_C, the maximum toler-
able peak current ratio from Figure 2 is 3.0 for red, orange
and yellow, and 2.4 for green.
The maximum forward current IF Max. at Ta = 40
_C is 20
mA for red, orange and yellow, and 25 mA for green.
Therefore, the maximum tolerable peak current under
these conditions is as follows :
FRed, orange and yellow
20 mA
3.0 = 60 mA
. .
FGreen
25 mA
2.4 = 60 mA
. . . . . . . . . . . . . . . . . .
For the repetition frequency, we recommend 1 kHz or
above.
(7)
Decrease of rated current
The maximum rated forward current of LED lamps will
vary depending on the ambient operating temperature.
(Refer to Figure 3)
(8)
Variation of luminous intensity depending on ambi-
ent temperature
ROHM LED lights have a temperature coefficient of
approximately –1% for red and orange, and
* 0.5% for
yellow and green. (Refer to the luminous intensity vs.
case temperature characteristics for each LED type.)
FStorage precautions
Storage in a dry box is best. However, if this is not pos-
sible we recommend the following conditions :
Temperature : 5 to 30
_C
Humidity : 60%RH max.
FRecommended PCB
We recommend the following hole diameters. Note, how-
ever, that these may vary depending on the board materi-
al, degree of integration, and wiring.
FLED lamp product names
The product names of ROHM LED lamps and chip LEDs
are coded as follows :
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SML-211UTT86K | 制造商:ROHM Semiconductor 功能描述:LED 0805 LO-CUR. RED 制造商:ROHM Semiconductor 功能描述:LED, 0805, RED, 2.5MCD, 620NM 制造商:ROHM Semiconductor 功能描述:LED, RED, 1.25MM X 1.4MM, 2.5MCD, 625NM; Bulb Size:1.25mm x 1.4mm; LED Color:Red; Luminous Intensity:2.5mcd; Forward Current If:2mA; Forward Voltage:1.8V; LED Mounting:SMD; Lens Shape:Rectangular; Wavelength Typ:625nm ;RoHS Compliant: Yes |
| SML-211WT | 制造商:ROHM 制造商全称:Rohm 功能描述:SML-21 Series |
| SML-211WTT86 | 制造商:Rohm 功能描述:590nm 4mcd 1.8V `bvLED 2~1.25 2.0mm` 1 Cut Tape 制造商:ROHM Semiconductor 功能描述:Chip LED,2x1.25mm,Yellow,4mcd 制造商:Rohm Semiconductor 功能描述:LED Uni-Color Yellow 2-Pin Chip LED T/R |
| SML-211YT | 制造商:ROHM 功能描述:YELLOW SM LED LOW CURR 2.0X1.25mm 590nm 制造商:ROHM 功能描述:YELLOW SM LED LOW CURR 2.0X1.25mm 590nm - free partial T/R at 500. |
| SML-211YTT86 | 功能描述:标准LED-SMD INDIUM LLESS YELLOW 590NM SMD RoHS:否 制造商:Vishay Semiconductors 封装 / 箱体:0402 LED 大小:1 mm x 0.5 mm x 0.35 mm 照明颜色:Red 波长/色温:631 nm 透镜颜色/类型:Water Clear 正向电流:30 mA 正向电压:2 V 光强度:54 mcd 显示角:130 deg 系列:VLMx1500 封装:Reel |
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