Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
1
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
Features
‧
Close responsively to the human eye spectrum
‧
Light to Current, analog output
‧
Good output linearity across wide illumination range
‧
Low sensitivity variation across various light sources
‧
Guaranteed temperature performance, -40
o
C to 85
o
C
‧
Wide supply voltage range, 2.5V to 5.5V
‧
Size : 2.0mm(L)*1.25mm(W)*0.8mm(H)
‧
RoHS compliant , Pb Free and Halogen Free package
Description
The ALS-PT17-51C/L177/TR8 is an ambient light sensor, consisting of phototransistor in
miniature SMD. EVERLIGHT ALS series product are a good effective solution to the power
saving of display backlighting of mobile appliances, such as the mobile phones, NB and PDAs.
Due to the high rejection ratio of infrared radiation, the spectral response of the ambient light
sensor is close to that of human eyes.
Applications
‧
Detection of ambient light to control display backlighting
Mobile devices – mobile phones, PDAs
Computing device – TFT LCD monitor for Notebook computer
Consumer device – TFT LCD TV, plasma TV, video camera, digital camera, toys
‧
Automatic residential and commercial management
‧
Automatic contrast enhancement for electronic signboard
‧
Ambient light monitoring device for daylight and artificial light
– Street light, CCD/CCTV
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
2
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
Package Dimensions
Top View
Unit: mm
Tolerances: ± 0.1mm
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
3
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
Absolute Maximum Ratings (Ta=25℃
℃℃
℃)
Parameter Symbol Rating Unit
Supply Voltage
[Note1]
V
cc
-0.5~6.0 V
Operating Temperature Range T
opr
-40 ~ +85 °C
Storage Temperature Range T
stg
-40 ~ +100 °C
Soldering Temperature Range
[Note1]
T
sol
260
±
10 °C
Note1:
For detail reflow time and the recommended temperature profile, please refer to page 8.
Recommended Operating Conditions (Ta=25℃
℃℃
℃)
Parameter Symbol Min. Max. Unit
Operating Temperature T
opr
-40 +85 °C
Supply Voltage V
cc
2.5 5.5 V
Ranking
Bin Symbol
Min Max Unit Test Condition
1 7 12
2 12 17
3
I
PH(ON)
17 23
µA V
CE
=5V
Ev=100Lux
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
4
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
Electrical and Optical Characteristics (Ta=25℃
℃℃
℃)
Parameter Symbol
MIN.
TYP.
MAX.
Unit Test Condition
Dark Current I
CEO
--- --- 0.1 uA V
CE
=10V, E
v
= 0Lux
Collector-Emitter
Saturation Voltage V
CE(sat)
--- --- 0.4 V I
C
=2mA, E
v
= 1000Lux
I
PH1
7 15 23 uA V
CE
=5V, E
v
= 100Lx
[Note1]
I
PH2
200 320 440 uA V
CE
=5V, E
v
= 1000Lx
[Note1]
Light Current
I
PH3
950 1520
2090
uA V
CE
=5V, E
v
= 1000Lx
[Note2]
Photocurrent Ratio I
PH3
/ I
PH2
--- 4.8 --- --- V
CE
=5V, E
v
= 1000Lx
Saturation Output
Voltage V
o
4.5 4.6 --- V V
cc
=5V, E
v
= 1000Lx
R
L
=75K
[Note2]
Peak Sensitivity
Wavelength λ
p
--- 630 --- nm
Sensitivity Wavelength
Range λ 390 --- 700 nm
Rise time tr --- 0.11
--- ms
Fall time tf --- 0.22
--- ms
V
CC
= 5 V
R
L
= 7.5KΩ
Note:
1. White Fluorescent light (Color Temperature = 6500K) is used as light source. However, White LED is
substituted in mass production.
2. Illuminance by CIE standard illuminant-A / 2856K, incandescent lamp.
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
5
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
1234567
1
10
100
1000
10000
V
CE
= 5V
E
V
= 100 Lux
Light current (uA)
Supply voltage (V)
- 6 0 - 4 0 - 2 0 0 2 0 4 0 6 0 8 0 1 0 0
1
1 0
1 0 0
1 0 0 0
1 0 0 0 0
V
C E
= 5 V
E
V
= 1 0 0 L u x
Light current (uA)
T e m p e r a tu r e ( )
℃
℃℃
℃
-60 -40 -20 0 20 40 60 80 100
0.01
0.1
1
10
100
1000
10000
100000
V
CE
= 7V
E
V
= 0 Lux
Dark current (nA)
Temperature ( )
℃
℃℃
℃
Typical Electrical and Optical Characteristics Curves
Fig.1 Light Current vs. Illuminance
Fig.2 Output Voltage vs. Illuminance
1 10 100 1000 10000
0.01
0.1
1
10
Ta=25
o
C; Vcc=5V
Flourescent Light
incandescent Lamp
Output Current (mA)
Illuminance Ev (Lux)
1 10 100 1000 10000
1E-4
1E-3
0.01
0.1
1
10
Ta=25
o
C ; Vcc=5V
Fluorescent light RL=1K
Ω
Fluorescent light RL=7.5K
Ω
Fluorescent light RL=75K
Ω
Ouput Voltage Vo (V)
Illuminance Ev (Lux)
Fig.3 Spectral Response Fig.4 Light current vs. Supply Voltage
Fig.5 Light Current vs. Temperature
Fig.6 Dark Current vs. Temperature
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
6
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
R
L
GND
Vout
Vcc
C
L
I
ph
Light
Source
Converting Photocurrent to Voltage
Note:
1. The output voltage (V
out
) is the product of photocurrent (I
PH
) and loading resistor (R
L
)
2. A right loading resistor shall be chosen to meet the requirement of maximum ambient light,
and output saturation voltage:
V
out
(max.)
=
I
out
(max.) ×
R
L
≦
V
out(saturation)
＝
V
cc
－
0.4V
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
7
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
Recommended method of storage
Reflow Terms: JEDEC Level 2 Specification
Dry box storage is recommended as soon as the aluminum bag has been opened prevent
1. Over-current-proof
Customer must apply resistors for protection, otherwise slight voltage shift might cause
big current happen. (Burned-out might happen).
2. Storage
(1) Do not open moisture proof bag before components are ready to use.
(2) Before opening moisture proof bag, components should be kept at 30
℃
or less and
90%RH or less.
(3) Components should be used within a year.
(4) After opened moisture proof bag, components should be kept at 30
℃
or less and
60%RH or less.
(5) Components should be used within 72 hours after opened moisture proof bag.
(6) If the moisture absorbent material (silica gel) has faded away or the components
have exceeded the storage time, baking treatment should be performed using the
following conditions. (Baking treatment: 60±5
℃
for 24 hours)
ESD Precaution:
Proper storage and handing procedures should be followed to prevent ESD damage to
the devices especially when they are removed from the Anti-static bag. Electro-Static
Sensitive Devices warning labels are on the packing.
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
8
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
Recommended Solder Profile
Notice:
(1) Reflow soldering should not be done more than two times.
(2) When soldering, do not put stress on the devices during heating.
(3) After soldering, do not warp the circuit board.
Soldering Iron
Each terminal is to go to the tip of soldering iron temperature less than 350
℃
for 3
seconds within once in less than the soldering iron capacity 25W. Leave two seconds and
more intervals, and do soldering of each terminal. Be careful because the damage of the
product is often started at the time of the hand solder.
Repairing
Repair should not be done after the device have been soldered. When repairing is
unavoidable, a double-head soldering iron should be used (as below figure). It should be
confirmed beforehand whether the characteristics of the device will or will not be
damaged by repairing.
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
9
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
xxxxxx
xxxxxx
xxxxxxxxxxxx
xxxx
xxxxxxxx
RoHS
Packing Quantity Specification
3000 PCS/ 1 Reel
Label Format
Reel Dimensions
Unit: mm
Tolerance: ±0.1mm
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
10
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
Collector
Emitter
Tape Dimensions
Unit: mm
Tolerance: ±0.1mm
Everlight Electronics Co., Ltd. http:\\www.everlight.com
Document No: DAS-017-002 Rev2.2 Dec. 26, 2008
11
Surface - Mount
Ambient Light Sensor
ALS-PT17-51C/L177/TR8
Note:
1. Above specification may be changed without notice. EVERLIGHT will reserve authority
on material change for above specification.
2. When using this product, please observe the absolute maximum ratings and the
instructions for using outlined in these specification sheets. EVERLIGHT assumes no
responsibility for any damage resulting from use of the product which does not comply
with the absolute maximum ratings and the instructions included in these specification
sheets.
3. These specification sheets include materials protected under copyright of EVERLIGHT
corporation. Please don’t reproduce or cause anyone to reproduce them without
EVERLIGHT’s consent.
