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Optoisolators - Transistor, Photovoltaic Output

The CNW84300 photovoltaic output optoisolators (OPTO-isolators) are open-collector, digital-output optoisolators with a digital output operating voltage range from 0.9 to 16V, and which provides 40kV/μs minimum common mode noise immunity. CNW84300 OPTO-isolators offer high photodetector sensitivity coupled with low forward current (ILD) requirements, providing highly reliable results even under difficult conditions. The CNW84300 SO8 has a 4.5V to 16V operating voltage range. The LED source features an operating voltage range of 0.9V to 4V.

Application Field

CNW84300 is used to electrically isolate he differential side interface from the I/O side of power applications. Its main applications include:

• High voltage protection of common mode and differential mode with on-board differential power source
• Power line off-hook protection with on-board differential power supplies.
• Electrical isolation between thr output and the motion controller.
• Onboard Audio amplifier.
• On board protection circuit for digital control bus.

Working Principle

The CNW84300 is a digital optocoupler composed of an LED and a photodetector. When the LED is energized, its light output reaches a photoreceptor and passes through a small hole in the protective wall of the optocoupler. When the light is detected by the photographs, a current is induced in the photodetector, and the signal detected by the photodetector is transmitted to the output of the CNW84300 optocoupler.The photodetector in the CNW84300 OPTO-isolator has a fast response time, low power led, and provides visual output signals that can be directly connected to logic or microcontroller.

The CNW84300 OPTO-isolator also provides reliable operation in high voltage environments. It is designed to provide a high common mode rejection ratio, which provides a high level of protection and efficiency so that the signal is cleaner and the power consumption is lower.

Performance

The CNW84300 OPTO-isolator\'s LED features a low forward voltage requirement of 0.9V to 4V and an output current capability of 10mA; the photodetector provides a high rate of response at 40kV/μs and features a low-voltage output of 0.9V to 16V. The typical rise time is 0.8μs and the typical fall time is 1μs. The device also features a wide temperature range, operating from -40°C to + 85°C.

Conclusion

The CNW84300 is an optoisolator that provides a high level of protection and efficiency for power applications. Its low forward voltage requirement coupled with its wide operating voltage range allows reliable operation in high voltage environments. The high response rate provides clean signals while keeping power consumption to a minimum. Its various features make it a suitable choice for power applications.

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