23 March 2007 -- New Japan Radio Co has introduced to the market the NJL7502L silicon phototransistor-type ambient light sensor, for ON/OFF control of interior lights, toys, TVs, etc. according to brightness of surroundings, and for automatic control of display brightness.
The NJL7502L is configured with a phototransistor plus an optical filter that uses New Japan Radio’s original resin lamination technology to reduce the risk of malfunction caused by infrared rays. With spectral sensitivity approaching that of the human eye, the sensor is accurate for various controls.
Eco-friendly silicon material is used for the phototransistor block, making the NJL7502L an ideal replacement for the CdS (cadmium sulfide-based cell-type ambient light sensors currently commonly used on board, in accordance with the RoHS Directive.
The NJL7502L is housed in a top view, pin-type package, for easy CdS cell replacement.
Major features of NJL7502L are;
Sensitivity approaching that of the human eye
Lead pin, top view-type package
Phototransistor uses eco-friendly silicon
Lead-free
The NJL7502L outputs sufficient light current more efficiently than conventional photo diode-type sensors do.
Functions Applications
NJL7502L is an Ambient light sensor with ON/OFF control mainly for lights, toys, etc. Replaces CdS cell. For packaging Lead pin, top view-type package is used.
Features and characteristics
Peak sensitivity wavelength 560nm typ.
Photocurrent ratio according to optical sources IL2/IL1 1.4 typ.
IL1: fluorescent light/ IL2: incandescent light
Light current 33µA typ., Ev = 100 Lux, fluorescent light source
Half-value angle ± 20º typ.
Dark current 0.1µA max. VCE = 20V
Schedule
Engineering Samples (ES): From December 2006
Mass Production (MP): From January 2007
The Light Sensor is available from Switches Plus Components.
