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参数资料
| 型号： | HDSP-4501-J0000 |
| 英文描述： | Quiet Series Octal D Flip-Flop with 3-STATE Outputs |
| 中文描述： | 大5 x 7点矩阵显示器17.3/26.5毫米字母数字字符高地 |
| 文件页数： | 8/8页 |
| 文件大小： | 93K |
| 代理商： | HDSP-4501-J0000 |
Operational Considerations
Electrical Description
These display devices are com-
posed of light emitting diodes, with
the light from each LED optically
stretched to form individual dots.
These display devices are well
suited for strobed operation. The
typical forward voltage values can
be scaled from Figure 2. These
values should be used to calculate
the current limiting resistor value
and the typical power dissipation.
Expected maximum V
F
values, for
driver circuit design and maximum
power dissipation, may be
calculated using the following
V
F
MAX models:
AlGaAs Red
(HDSP-M10x):
V
F
MAX = 1.8 V + I
PEAK
(20
)
For I
PEAK
≤
20 mA
V
F
MAX = 2.0 V + I
PEAK
(10
)
For I
PEAK
≥
20 mA
HER (HDSP-450x):
V
F
MAX = 1.75 V + I
PEAK
(35
)
For I
PEAK
≥
5 mA
Green (HDSP-510x):
V
F
MAX = 1.75 V + I
PEAK
(38
)
For I
PEAK
≥
5 mA
Figure 3 allows the designer to
calculate the luminous intensity at
different peak and average
currents. The following equation
calculates intensity at different
peak and average currents:
I
V
AVG = (I
F
AVG/I
F
AVG DATA
SHEET)(
η
PEAK
)(I
V
DATA SHEET)
Where:
I
F
AVG is the desired time averaged
LED current.
I
F
AVG DATA SHEET is the time
averaged data sheet test current
for I
V
DATA SHEET.
η
PEAK
is the relative efficiency at
the peak current, scaled from
Figure 3.
I
V
DATA SHEET is the time
averaged data sheet luminous
intensity, resulting from I
F
AVG
DATA SHEET.
I
V
AVG is the calculated time
averaged luminous intensity
resulting from I
F
AVG.
For example, what is the luminous
intensity of an AlGaAs Red (HDSP-
L10X) driven at 50 mA peak 1/5
duty factor
I
F
AVG = 50 mA * 0.2 = 10 mA
I
F
AVG DATA SHEET = 2 mA
η
PEAK
= 0.98
I
V
DATA SHEET = 1650
μ
cd
Therefore
I
V
AVG = (10 mA/2 mA)(0.98)
(1650
μ
cd) = 8085
μ
cd
Thermal Considerations
The device thermal resistance may
be used to calculate the junction
temperature of the central LED.
The equation below calculates the
junction temperature of the central
(hottest) LED.
T
J
= T
A
+ (P
D
)(R
θ
J-A
)(N)
P
D
=(V
F
MAX)(I
F
AVG)
R
θ
J-A
=
R
θ
J-PIN
+ R
θ
PIN-A
T
J
is the junction temperature of
the central LED.
T
A
is the ambient temperature.
P
D
is the power dissipated by one
LED.
N is the number of LEDs ON per
character.
V
F
MAX is calculated using the
appropriate V
F
model.
R
θ
J-A
is the package thermal
resistance from the central LED
to the ambient.
R
θ
J-PIN
is the package thermal
resistance from the central LED
to pin.
R
θ
PIN-A
is the package thermal
resistance from the pin to the
ambient.
For example, what is the maximum
ambient temperature an HDSP-
L10X can operate with the
following conditions:
I
PEAK
= 125 mA
I
F
AVG = 10 mA
R
θ
J-A
= 50
°
C/W
N = 35
T
J
MAX = 110
°
C
V
F
MAX = 2.0 V + (0.125 A)(10)
= 3.25 V
P
D
= (3.25 V)(0.01 A)
= 0.0325 W
T
A
= 110
°
C –
(50
°
C/W)(0.0325 W)(35)
= 53
°
C
The maximum number of dots ON
for the ASCII character set is 20.
What is the maximum ambient
temperature an HDSP-L10X can
operate with the following
conditions:
I
PEAK
= 125 mA
I
F
AVG = 10 mA
R
θ
J-A
= 50
°
C/W
N = 20
T
J
MAX = 110
°
C
V
F
MAX = 3.25 V
P
D
= 0.0325 W
T
A
= 110
°
C –
(50
°
C/W)(0.0325 W)(20)
= 77
°
C
Therefore, the maximum ambient
temperature can be increased by
reducing the average number of
dots ON from 35 to 20 dots ON per
display.
Contrast Enhancement
For information on contrast
enhancement, please see
Application Note 1015.
Soldering/Cleaning
For Soldering/Cleaning information
on soldering LEDs, please refer to
Application Note 1027.
www.agilent.com/semiconductors
E-mail: SemiconductorSupport@agilent.com
Data subject to change.
Copyright 2004 Agilent Technologies, Inc.
Obsoletes 5988-2224EN
July 8, 2004
5988-5215EN
For product information and a complete list of
Agilent contacts and distributors, please go to
our web site.
相关PDF资料 |
PDF描述 |
|---|---|
| HDSP-4501-JF000 | Quiet Series Octal D Flip-Flop with 3-STATE Outputs; Package: SOP; No of Pins: 20; Container: Rail |
| HDSP-4501-JG000 | Quiet Series Octal D Flip-Flop with 3-STATE Outputs; Package: SOP; No of Pins: 20; Container: Tape & Reel |
| HDSP-4501-JH000 | Large 5 X 7 Dot Matrix Alphanumeric Displays 17.3/26.5 mm Character Heights |
| HDSP-4501-JI000 | Large 5 X 7 Dot Matrix Alphanumeric Displays 17.3/26.5 mm Character Heights |
| HDSP-4501-JJ000 | Large 5 X 7 Dot Matrix Alphanumeric Displays 17.3/26.5 mm Character Heights |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HDSP-4503 | 制造商:Hewlett Packard Co 功能描述: |
| HDSP-4600 | 功能描述:LED 显示器和配件 Green 571nm 0.43in 7 Segment RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
| HDSP-4601 | 功能描述:LED 显示器和配件 Green 571nm 0.43in 7 Segment RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
| HDSP-4603 | 功能描述:LED 显示器和配件 Green 571nm 0.43in 7 Segment RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
| HDSP-4603 | 制造商:Avago Technologies 功能描述:LED DISPLAY 0.43" GREEN |
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