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Phototransistor Ambient Light Sensor (A1 & A4 Chip)

Ambient Light Sensor - (PT-A4-AC-5-PN-850)

New fourth generation A4 chip for phototransistors provide fast response speed, stable performance, and excellent consistency.

Direct's new fourth generation A4 chip gives characteristics of ambient light sensor (ALS) faster response speed, lower dark current, more consistency in good batch, and smaller static current. When an ambient light sensor is required for portable and many other applications, Direct A4 chip has the right solution. Ambient Light Sensor A4 chips enhance performance in saving energy, automatic sensitivity to light, automatic sensitivity to light, LED-backlighted, LCD displays code product, instrument ,industry device etc.

The A1 & A4 Chips enabling environmentally friendly photosensitive sensors feature sensitive control under low illumination, stable current signal output under strong light source. Multiple light sources at the same time can be used to ensure consistent photosensitive effect, not false trigger. Meet the latest environmental requirements of toys. Applicable to all kinds of light control lighting products (such as night lights, lawn lamps, solar lights, etc.), automatically adjust the background light (such as LCD, mobile phones, cameras, computer cameras, security monitoring machines, etc.).

For the convenience of installation in all kinds of products in any position, different sizes are available upon request. So that product consistency is better, more market competitiveness. It is also achievable to provide the bright current / dark current (bright resistance / dark resistance) for the most suitable product.

Download complete specification Phototransistor Ambient Light Sensor (A1 & A4 Chip) PDF.

Features :
  1. Good batch consistency, small static current.
  2. Fast response speed, stable performance, beautiful appearance.
  3. The effective control distance is greater than 1.5 meters.
  4. Low current loss in the static.
Applications :
  1. Replace the traditional CDS photoresistor.
  2. Cadmium and lead free with RoHS compliant.
  3. Applicable to control all kinds of light control toys and Infrared testing equipment.
Dimensions & Configurations (Unit: mm) (PT-A1-AC-3-PE-850) Plate Edge
Ambient light sensor (PT-A1-AC-3-PE-850) Plate Edge Dimensions
Ambient light sensor (PT-A1-AC-3-PE-850) Plate Edge Dimensions
Plate Edge Ambient light sensor (PT-A1-AC-3-PE-850)
Plate Edge Ambient light sensor (PT-A1-AC-3-PE-850)
Part NO. A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) H (mm) I (mm)
PT-A1-AC-3-PE-850 4.05 ± 0.20 3.00 ± 0.20 1.50 Max. 1.50 ± 0.5 2.54 ± 0.20 3.85 ± 0.20 0.75 ± 0.20 25.4 Min. 0.50 ± 0.20
Remark:
  • The epoxy resin highest: 1.5mm max.
  • Product images, plastic color of apperence, and all other information is for reference only, goods in-kind prevail.
  • Short Lead—Collector     Long Lead—Emitter.

Dimensions & Configurations (Unit: mm) (PT-A1-AC-5-HE-850) Helmet Edge
Ambient Light Sensor (PT-A1-AC-5-HE-850) Helmet Edge Dimensions
Ambient Light Sensor (PT-A1-AC-5-HE-850) Helmet Edge Dimensions
Helmet Edge Photosensitive Transistor (PT-A1-AC-5-HE-850)
Helmet Edge Photosensitive Transistor
(PT-A1-AC-5-HE-850)
Part NO. A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) H (mm) I (mm)
PT-A1-AC-5-HE-850 5.80 ± 0.20 4.80 ± 0.20 1.50 Max. 1.50 ± 0.5 2.54 ± 0.20 5.00 ± 0.20 1.50 ± 0.20 25.4 Min. 0.50 ± 0.20
Remark:
  • The epoxy resin highest: 1.5mm max.
  • Product images, plastic color of apperence, and all other information is for reference only, goods in-kind prevail.
  • Short Lead—Collector     Long Lead—Emitter.

Dimensions & Configurations (Unit: mm) (PT-A4-AC-5-PN-850) Plate None
Ambient light sensor (PT-A4-AC-5-PN-850) Plate None Dimensions
Ambient light sensor (PT-A4-AC-5-PN-850) Plate None Dimensions
Plate None Phototransistor (PT-A4-AC-5-PN-850)
Plate None Phototransistor
(PT-A4-AC-5-PN-850)
Part NO. A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) H (mm)
PT-A4-AC-5-PN-850 5.00 ± 0.20 5.00 ± 0.20 2.50 ± 0.20 1.50 ± 0.5 2.54 ± 0.20 2.50 ± 0.20 25.4 Min. 0.50 ± 0.20
Remark:
  • The epoxy resin highest: 1.5mm max.
  • Product images, plastic color of apperence, and all other information is for reference only, goods in-kind prevail.
  • Short Lead—Collector     Long Lead—Emitter.
Electro-Optical Characteristics (Ta=25°C) (PT-A1-AC-3-PE-850)
Parameter Symbol Condition Min. Typ. Max. Unit
Peak Wavelength λp \ - 850 - nm
Spectral Response Bandwidth λ \ 400 - 1100 nm
Collector-Emitter Breakdown Voltage Bvceo Ice=100µA
Ee=0mW/cm2
30 - - V
Emitter-Base Breakdown Voltage Bveco Ice=100µA
Ee=0mW/cm2
3 - - V
Collector-Emitter Saturation Voltage Vce
(sat)
Ice=2mA
Ee=1mW/cm2
- - 0.4 V
Photo Current IL(1) Vcc=5V
Ev=10Lux
3 4.5 6 μA
IL(2) Vcc=5V
Ev=30Lux
9 13.5 18 μA
IL(3) Vcc=5V
Ev=100Lux
30 45 60 μA
Collector Dark Current Iceo Vce=5V
Ev=0Lux
- - 0.1 μA
Rise Time tr Vcc=5V
Ice=1mA
RL=1000Ω
15 ms
Fall Time tf 15

Electro-Optical Characteristics (Ta=25°C) (PT-A1-AC-5-HE-850)
Parameter Symbol Condition Min. Typ. Max. Unit
Peak Wavelength λp \ - 850 - nm
Spectral Response Bandwidth λ \ 400 - 1100 nm
Collector-Emitter Breakdown Voltage Bvceo Ice=100µA
Ee=0mW/cm2
30 - - V
Emitter-Base Breakdown Voltage Bveco Ice=100µA
Ee=0mW/cm2
3 - - V
Collector-Emitter Saturation Voltage Vce
(sat)
Ice=2mA
Ee=1mW/cm2
- - 0.4 V
Photo Current IL(1) Vcc=5V
Ev=10Lux
4.5 6.5 9.0 μA
IL(2) Vcc=5V
Ev=30Lux
13.5 19.5 27 μA
IL(3) Vcc=5V
Ev=100Lux
45 65 90 μA
Collector Dark Current Iceo Vce=5V
Ev=0Lux
- - 0.1 μA
Rise Time tr Vcc=5V
Ice=1mA
RL=1000Ω
15 ms
Fall Time tf 15

Electro-Optical Characteristics (Ta=25°C) (PT-A4-AC-5-PN-850)
Parameter Symbol Condition Min. Typ. Max. Unit
Peak Wavelength λp \ - 850 - nm
Spectral Response Bandwidth λ \ 400 - 1100 nm
Collector-Emitter Breakdown Voltage Bvceo Ice=100µA
Ee=0mW/cm2
30 - - V
Emitter-Base Breakdown Voltage Bveco Ice=100µA
Ee=0mW/cm2
3 - - V
Collector-Emitter Saturation Voltage Vce
(sat)
Ice=2mA
Ee=1mW/cm2
- - 0.4 V
Photo Current IL(1) Vcc=5V
Ev=10Lux
5 8 12 μA
IL(2) Vcc=5V
Ev=30Lux
15 24 36 μA
IL(3) Vcc=5V
Ev=100Lux
50 80 120 μA
Collector Dark Current Iceo Vce=5V
Ev=0Lux
- - 0.1 μA
Rise Time tr Vcc=5V
Ice=1mA
RL=1000Ω
15 ms
Fall Time tf 15
∗ Remark: 
  • Vce must be greater than 0.4V to enable the product function and can not exceed its maximum rating 30V. The working volatge: 0.4V ~ 30V.

Absolute maximum ratings (Ta=25°C) (A1 & A4 Chip)
Parameter Symbol Value Unit
Collector-Emitter Voltage VCEO 30 V
Emitter-Collector-Voltage VECO 3 V
Power Dissipation PC 70 mW
Operating Temperature Range Topr -25 ~ +85 °C
Storage Temperature Tstg -40 ~ +100 °C