Series:	*
Packaging:	--
Part Status:	Obsolete
Voltage - Collector Emitter Breakdown (Max):	45V
Current - Dark (Id) (Max):	100nA
Wavelength:	880nm
Viewing Angle:	20°
Power - Max:	300mW
Mounting Type:	Through Hole
Orientation:	Top View
Operating Temperature:	-65°C ~ 125°C (TA)
Package / Case:	TO-206AA, TO-18-3 Metal Can

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Introduction

Optical Sensors, also known as Phototransistors, are an important and popular category of sensors. A phototransistor is a type of bipolar transistor that is sensitive to light. It consists of a transistor connected to a light-sensitive diode. Phototransistors can measure a wide range of input signals, from infrared (IR) radiation to visible light. In this article, we will discuss the application field and working principle of a L14G1 phototransistor.

Application Field of the L14G1 Phototransistor

The L14G1 is a general purpose phototransistor and is widely used in a variety of applications. It is used in light switches, motion detectors, security systems, and optical input devices. It is ideal for infrared (IR) sensing applications, such as remote controllers, and can also detect visible light. In addition, it can be used as a proximity switch and can be used to detect objects in close proximity.

Working Principle of the L14G1 Phototransistor

The L14G1 phototransistor is composed of a photodiode and a bipolar transistor. The light is first converted into electrons when it passes through the photodiode. These electrons induce a current in the base of the bipolar transistor. This, in turn, induces a current in the emitter-collector circuit, allowing a voltage to be measured at the output.The current generated at the base of the phototransistor depends on the intensity of the light. When the intensity of the light is low, the current generated in the base is also low, and as a result, the voltage generated in the emitter-collector circuit is low. When the intensity of the light is high, the current generated in the base is also high, and as a result, the voltage generated in the emitter-collector circuit is also high.

Conclusion

The L14G1 phototransistor is a general-purpose optical sensor. It has a wide range of applications, including motion detectors, light switches, proximity sensors, and optical input devices. Its working principle is based on the generation of a current in the base of the phototransistor, which depends on the intensity of the light incident on the photodiode.

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