3. Epoxy meniscus may extend about 1mm (0.040”) down the leads.
Device Selection Guide
Iv (cd) @ 20mA
Part Number
HLMP-CW18-VY0xx
HLMP-CW19-VY0xx
HLMP-CW28-TW0xx
HLMP-CW29-TW0xx
HLMP-CW38-SV0xx
HLMP-CW39-SV0xx
Notes:
1. Tolerance for luminous intensity measurement is +/- 15%
2. The luminous intensity is measured on the mechanical axis of the lamp package.
3. The optical axis is closely aligned with the package mechanical axis.
4. LED light output is bright enough to cause injuries to the eyes. Precautions must be taken to prevent looking directly at the LED without proper safety
equipment.
Typ. Viewing Angle
Min.
15°
15°
23°
23°
30°
30°
4.20
4.20
2.50
2.50
1.90
1.90
Typ.
6.40
6.40
3.80
3.80
3.00
3.00
Standoff Leads
No
Yes
No
Yes
No
Yes
Package
Dimension
A
B
A
B
A
B
Part Numbering System
L M P - C W XX - X X X XX
Mechanical Option
00: Bulk
DD: Ammo Pack
Color Bin Options
0: Full color bin distribution
Maximum Intensity Bin Limit
0: No maximum intensity bin limit
Minimum Intensity Bin Limit
Refer to Device Selection Guide
Viewing Angle
18: 15 without standoffs
19: 15˚ with standoffs
28: 23˚ without standoffs
29: 23˚ with standoffs
38: 30 ˚ without standoffs
39: 30 ˚ with standoffs
Color Options
W: White
Package Options
C: T-1 3/4
2
Absolute Maximum Ratings (T
A
= 25°C)
Parameter
DC Forward Current
[1]
Peak Forward Current
[2]
Average Forward Current
Power Dissipation
LED Junction Temperature
Operating Temperature Range
Storage Temperature Range
Wave Solder Temperature
[3]
Solder Dipping Temperature
[3]
Notes:
1. Derate linearly as shown in Figure 4.
2. Duty Factor 30%, 1 KHz
3. 1.59 mm (0.060 inch) below body
Value
30
100
30
120
130
-40 to +85
-40 to +100
250 for 3 secs
260 for 5secs
Units
mA
mA
mA
mW
°C
°C
°C
°C
°C
Electrical/Optical Characteristics (T
A
= 25
o
C)
Parameters
Forward voltage
Capacitance
Reverse Voltage
[1]
Thermal resistance
Viewing Angle
[2]
CW18/CW19
CW28/CW29
CW38/CW39
Symbol
V
F
C
V
R
Rθ
J-PIN
2θ
1/2
15
23
30
0.31
0.32
I
F
= 20 mA
Minimum Typical
3.4
53
0.6
240
Maximum Units
4.0
V
pF
V
o
C/W
Test Condition
I
F
= 20 mA
V
F
=0, f=1 MHz
I
R
= 10
µA
LED Junction to cathode lead
I
F
= 20 mA
Degree
Chromaticity Coordinate
[3]
X
Y
Notes:
2. 2
θ
1/2
is the off-axis angle where the luminous intensity is ½ the on axis intensity
1. The reverse voltage of the product is equivalent to the forward voltage of the protective chip at I
R
= 10
µ
A
3. The chromaticity coordinates are derived from the CIE 1931 Chromaticity Diagram and represent the perceived color of the device.
编译自semiengineering 业界越来越关注人工智能的功耗问题，但这个问题并没有简单的解决方案。这需要深入了解应用、半导体和系统层面的软件和硬件架构，以及所有这些的设计和实现方式。每个环节都会影响总功耗和提供的效用。这是最终必须做出的权衡。 但首先，必须解决效用问题。电力是否被浪费了？“我们将电力用于有价值的用途，”Ansys（现为新思科技旗下公司）产品营销总监 Marc Swi...[详细]
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