DESCRIPTION
TEPT4400 ambient light sensor is a silicon NPN epitaxial planar phototransistor in a T-1 package. It is sensitive to visible light much like the human eye and has peak sensitivity at 570 nm.

FEATURES
• Package type: leaded
• Package form: T-1
• Dimensions (in mm): Ø 3
• High photo sensitivity
• Adapted to human eye responsivity
• Angle of half sensitivity: ϕ = ± 30°
• Material categorization:
   for definitions of compliance please see
   www.vishay.com/doc?99912

APPLICATIONS
• Ambient light sensor for control of display backlight
   dimming in LCD displays and keypad backlighting of
   mobile devices and in industrial on / off-lighting operation
• Replacement of CdS photoresistors