A phototransistor chip is a type of semiconductor device that is used to detect light. It is a type of bipolar transistor that is designed to amplify the current generated by incident light.
The phototransistor chip is typically made by adding a layer of light-sensitive material, such as silicon, germanium, or gallium arsenide, to the base of a bipolar transistor. When light strikes the light-sensitive material, it generates electron-hole pairs, which are then swept into the base region of the transistor by the electric field created by the applied voltage. This results in an increase in the current flowing through the transistor, which can be used to detect the presence of light.
Phototransistor chips are commonly used in a variety of applications, including light sensing, optical communications, and industrial automation. They offer several advantages over other types of light sensors, including higher sensitivity, faster response times, and lower noise levels. They can also be easily integrated into electronic circuits, and are available in a range of package sizes and styles.
The function of phototransistor is to detect light and to convert it into electrical signals. Phototransistor chips are used in smoke detectors, solar systems, various light measurement and optical communication devices. Phototransistors and photodiodes have identical function, however there are some minor differences in application.
|Size (mil)||ICEO, µA||VCE(Sat), V||BVCEO, V||BVECO, V||BVCBO, V||hFE||Notes|
|24*24||0.1||0.1||60||5||60||3600||Peak Sensing Wavelength 940nm|
|37*14||0.4||0.3||30||5||40||2500||Peak Sensing Wavelength 940nm|
|18*18||0.03||0.3||85||8||85||2500||880nm Peak Sensing Wavelength|
|14*14||0.015||0.3||85||8||85||2500||880nm Peak Sensing Wavelength|