TEPT4400, photo transistor for ambient light sensor application, plays a key role in power savings strategies by controlling LCD display intensity and keypad backlighting of mobile devices and in industrial on/offlighting operation. It is sensitive to visible light much like the human eye.
 
Specifications:
Manufacturer: Vishay Detectors 
Photo: Peak Wavelength: 570 Nm, 
Maximum Operating Temperature: + 85 C
Minimum Operating Temperature: - 40 C / 
Angle: 30 deg 
Product: Ambient light 
Type of sensors: Ambient light sensor photos with phototransistors output
 
Resources: 
1. TEPT4400 Datasheet