Output Type:	Transistor
Supplier Device Package:	16-SO
Package / Case:	16-SOIC (0.179", 4.55mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	400mV
Current - DC Forward (If) (Max):	50mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	50mA
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	2µs, 3µs
Turn On / Turn Off Time (Typ):	3µs, 3µs
Current Transfer Ratio (Max):	400% @ 5mA
Current Transfer Ratio (Min):	100% @ 5mA
Voltage - Isolation:	2500Vrms
Number of Channels:	4
Part Status:	Active
Packaging:	Tube

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Optoisolators - Transistor, Photovoltaic Output, Application Field and Working Principle

Optoisolators are an electronic component composed of an input stage, an opto-electric element, and an output stage. These components separate a signal photographically between two circuits (isolating them from each other). Optoisolators, also known as opto-couplers, opto-isolators, photocouplers, and opto-isolators, are widely used in the industrial world to ensure electrical isolation of two circuits.The TLP291-4(GB,E) is one type of optoisolator from Panasonic and is a phototransistor-output coupler. It has a fast response time and an isolation voltage of 300V rms. This component is primarily used in photocontrol and signal control of logic power circuits. It offers superior safety protection from spikes and/or current surges, as well as compatibility with logic-level power circuits.This optocoupler can be found in the following applications:industrial control equipment, audio equipment, automotive equipment, computer peripherals, test and measuring equipment, white goods, and medical equipment.

Working Principle

The TLP291-4(GB,E) optoisolator has an input stage that includes a lamp or LED, which produces light when energized. The light is then directed into the opto-electric element, which contains a phototransistor. When the light hits the base of the phototransistor, the phototransistor turns ON. The output stage is then activated, allowing the electrical signal to be transmitted from the input stage to the output stage.This opto isolator provides electrical isolation between two circuits while transmitting a signal. The input stage of an optoisolator, when energized, produces light which is then received by the opto-electric element. The opto-electric element contains a phototransistor, which is where the signal is transmitted to the output stage. The output stage is then activated, allowing the electrical signal to be transmitted from the input stage to the output stage. This ensures isolation between the two circuits and the two circuits remain electrically isolated even if the same voltage is applied to both of them.The TLP291-4(GB,E) optoisolator utilizes photovoltaic technology to achieve electrical isolation between two circuits while transmitting a signal. The photovoltaic cell produces voltage when illuminated by a light source, such as a laser diode. The voltage is then transmitted through an amplifier and controller, and then out to the output circuit. The photovoltaic cell isolates the two circuits, preventing any current or voltage from passing through it.

Conclusion

The TLP291-4(GB,E) optoisolator provides a reliable and efficient means of isolating two circuits from each other while transmitting a signal. It offers superior safety protection from spikes and/or current surges, as well as compatibility with low-level power circuits. The component can also be found in a wide range of industrial applications, from industrial control equipment to medical equipment. It is also used in some automotive applications. This optocoupler is designed to provide electrical isolation, while still maintaining a high-accuracy transmission of the signal.

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