LDA111STR

Output Type:	Darlington with Base
Supplier Device Package:	6-SMD
Package / Case:	6-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Vce Saturation (Max):	1V
Current - DC Forward (If) (Max):	1mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	--
Voltage - Output (Max):	30V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	--
Turn On / Turn Off Time (Typ):	8µs, 345µs
Current Transfer Ratio (Max):	30000% @ 1mA
Current Transfer Ratio (Min):	300% @ 1mA
Voltage - Isolation:	3750Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators are an important component in modern electronics as they provide electrical isolation between circuits without the need for direct electrical connections. The LDA111STR is one type of optoisolator, and is a transistor and photovoltaic output device. This article will discuss the application fields and working principle of the LDA111STR.The LDA111STR is a non-contact optoisolator, and provides over 200 volts of electrical isolation between control circuit and the load circuit. This makes it a suitable choice for use in industrial equipments, such as measuring instruments, controllers, and protection devices. It is also suitable for use in medical, robotic, and automotive applications as it allows electrical isolation between digital signals and power signals, and between digital and analog signals.The LDA111STR is constructed of a bipolar transistor which acts as the input stage, and an integrated photo detector which serves as the output stage. The photo detector is composed of several layers of semiconductor, which absorb photons from the light emitted by the input transistor. This causes the release of carriers which then permit current to flow between the output contacts of the device.The working principle of the LDA111STR is based on the photoelectric effect, which was first observed by Edmund Becquerel in 1839. This occurs when light, in the form of photons, strikes a surface which is producing a current. When the photo detector of the LDA111STR is exposed to light from the input transistor, it produces a current and thus provides an output signal. The output is then proportional to the intensity of the light, providing greater isolation between the circuits than is possible with a connection between them.In conclusion, the LDA111STR is a reliable optoisolator which provides electrical isolation between circuits without the need for direct electrical connections. It is suitable for use in a variety of applications due to its ability to provide electrical isolation between digital signals and power signals, and between digital and analog signals. Finally, the working principle of the LDA111STR is based on the photoelectric effect, which occurs when light, in the form of photons, strikes a surface which is producing a current.

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