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Chip Ambient Light Sensor, RoHS Compliant (PT-3528)

Ambient Light Sensor - PT-3528

Chip Ambient Light Sensor IC type for security lighting with near human Eye photopic response.

Chip ambient light sensors (ALS) will also be known as photodetector, illumination sensors, photo transistor, brightness sensors, optical sensors, or simply light sensors. The ALS signal may be used to instruct the keypad LED driver to reduce keypad backlighting minimizing as much as 30% from the power within the input standby power mode. Inside a mobile phone, the ALS enables automatic charge of display backlight brightness over an array of illumination conditions from the dark atmosphere to sunlight. This control significantly improves visibility and minimizes power consumption since LCD backlighting is able to take around 51% through the power within the input standby mode.

The (PT-IC-AC-3528-520) is a high-precision environment-friendly ambient light sensor. Optical IC with spectral response close to human eye sensitivity. A single chip on the photosensitive surface of the built-in current amplifier circuit is able to measure the visible light band. Compared with traditional visible light to near-infrared receiving silicon products, the light IC has a smaller output fluctuation. Parameters can be directly substituted for the most versatile Cds resistor, so this sensor can be used as an environmentally friendly substitute for cadmium sulfide resistor.

The (PT-IC-BC-3528-550) using high quality chip packaging and processing super-plated infrared filter membrane on chip surface, so this sensor can fully filter infrared interference. It is no need to add the casing and extra filter and effective filtering out the effect of light reflection due to infrared emission on security products. This chip IC features high precision and excellent consistency, high temperature performance, working in high temperature environment, and dark current stability.

Download complete specification Chip Ambient Light Sensor, RoHS Compliant (PT-3528) PDF.

Features :
  1. Ambient light sensors mimic the human eye with peak wavelength 520nm and 550nm, anti-infrared interference.
  2. Fast response speed and stable performance, Good batch consistency, Small static current.
Applications :
  1. No cadmium, lead free and other harmful substances, compliant with EU RoHS standards.
  2. Suitable for all kinds of infrared light control, infrared radiation, infrared reflection,
    applicable to all types of light control lighting products: such as small night Lights, lawn lights, solar lamps.
  3. Suitable for all kinds of high illumination or visible light interference strong products, automatic adjustment background light:
    such as LCD, mobile phone, camera, computer camera, installation control machine.
  4. Control all kinds of optical control video control toys and All kinds of optical control infrared testing equipment.
Custom Design :
  1. For the convenience of installation in all kinds of products in any position, different sizes are available upon request.
  2. Provide bright current / dark current (bright resistance / dark resistance) for the most suitable product.
Dimensions & Configurations (Unit: mm) (PT-3528)
SMD IR Light Sensor (PT-3528) Dimensions
SMD IR Light Sensor (PT-3528) Dimensions
 SMD IR Light Sensor (PT-3528)
PT-IC-BC-3528-550
 SMD IR Light Sensor (PT-3528)
PT-IC-AC-3528-520
Part NO. A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) H (mm) I (mm)
PT-IC-BC-3528-550 3.20 ± 0.1 3.50 ± 0.1 2.10 ± 0.1 2.80 ± 0.1 1.90 ± 0.05 1.81 ± 0.05 0.80 ± 0.2 1.50 ± 0.2 0.50 ± 0.1
PT-IC-AC-3528-520 3.20 ± 0.1 3.50 ± 0.1 2.10 ± 0.1 2.80 ± 0.1 1.90 ± 0.05 1.81 ± 0.05 0.80 ± 0.2 1.50 ± 0.2 0.50 ± 0.1
Electro-Optical Characteristics (Ta=25°C) PT-IC-BC-3528-550
Parameter Symbol Condition Min. Typ. Max. Unit
Peak Wavelength λp \ - 550 - nm
Spectral Response Bandwidth λ \ 400 - 700 nm
Operating Voltage Vcc \ - 5 - V
Photo Current IL(1) Vcc=5V
Ev=10Lux
1.5 3 4.5 μA
IL(2) Vcc=5V
Ev=30Lux
4.5 9 13.5 μA
IL(3) Vcc=5V
Ev=100Lux
15 30 45 μA
Collector Dark Current Id Vcc=5V
Ev=0Lux
- - 0.1 μA
IR Receiving Current IL(4) Vcc=5V/850nm IR LED
Ee=1mW/cm2
- - 0.1 μA
Rise Time tr Vcc=5V
Ev=30Lux
RL=1000Ω
4.5 ms
Fall Time tf 4.5

Electro-Optical Characteristics (Ta=25°C) PT-IC-BC-3528-550
Parameter Symbol Rating Value Unit
Operating Voltage Vcc Min. Max. V
1 10 V
Power Dissipation Pc 70 mW
Operating Temperature Range Topr -25 ~ +85 °C
Storage Temperature Tstg -40 ~ +100 °C
Electro-Optical Characteristics (Ta=25°C) PT-IC-AC-3528-520
Parameter Symbol Condition Min. Typ. Max. Unit
Peak Wavelength λp \ - 520 - nm
Spectral Response Bandwidth λ \ 400 - - nm
Operating Voltage Vcc \ - 5 - V
Photo Current IL(1) Vcc=5V
Ev=10Lux
7 13 18 μA
IL(2) Vcc=5V
Ev=30Lux
21 39 54 μA
IL(3) Vcc=5V
Ev=100Lux
70 130 180 μA
Collector Dark Current Id Vcc=5V/85°C
Ev=0Lux
- - 0.8 μA
Rise Time tr Vcc=5V
Ev=30Lux
RL=1000Ω
4.5 ms
Fall Time tf 4.5

Electro-Optical Characteristics (Ta=25°C) PT-IC-AC-3528-520
Parameter Symbol Rating Value Unit
Operating Voltage Vcc Min. Max. V
1 10 V
Power Dissipation Pc 70 mW
Operating Temperature Range Topr -25 ~ +85 °C
Storage Temperature Tstg -40 ~ +100 °C
Relative Spectral Sensitivity vs. Wavelength PT-IC-BC-3528-550
Relative Spectral Sensitivity vs. Wavelength PT-IC-BC-3528-550

Photo Current vs. Illuminance PT-IC-BC-3528-550
Photo Current vs. Illuminance PT-IC-BC-3528-550

Dark Current vs. Ambient Temperature PT-IC-BC-3528-550
Dark Current vs. Ambient Temperature PT-IC-BC-3528-550

Photo Current Measurement Method PT-3528
Photo Current Measurement Method
Relative Spectral Sensitivity vs. Wavelength PT-IC-AC-3528-520
Relative Spectral Sensitivity vs. Wavelength PT-IC-AC-3528-520

Photo Current vs. Illuminance PT-IC-AC-3528-520
Photo Current vs. Illuminance PT-IC-AC-3528-520

Dark Current vs. Ambient Temperature PT-IC-AC-3528-520
Dark Current vs. Ambient Temperature PT-IC-AC-3528-520

Photo Current Measurement Method PT-3528
Photo Current Measurement Method