JANTX4N47A

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Optoisolators - Transistor, Photovoltaic Output are designed to provide a safe, isolated sectionalized control or sensed output for applications where insulation between the circuits is necessary. JANTX4N47A is a photovoltaic output optoisolator that segregates input and output circuit by optical means. This optoisolator provides high current capability and low saturation voltage.

The JANTX4N47A is an electromagnetically-coupled device in a single in-line 4-pin package. It has a built-in infrared LED which functions as the input side of the optoisolator. The output side includes a photovoltaic transistor. When the LED current flows through the optoisolator, the light output from LED activates the photovoltaic transistor to produce collector current corresponding to the current flowing through LED. The JANTX4N47A has a current transfer ratio (CTR) of 100% – 200%.

The JANTX4N47A’s maximum collector current is 0.5A while the maximum photovoltaic transistor saturation voltage is 0.4V. An isolator transistor has a low CTR over temperature range and the JANTX4N47A has an ambient operating temperature range of -55°C to +125°C. The device is sealed in a molded epoxy case that provides protection from external environmental conditions and mechanical damage.

JANTX4N47A has a wide range of application fields. It can be used in automotive applications that require reliable isolation between the high side and the low side of the circuits. It is also useful in many industrial and telecom applications such as reactive power compensation, insulation monitoring, and power factor correction. It can be used in security systems that require an optoisolator to isolate the input from the output. The optoisolator can also be used in solar power systems, lighting circuits, and LED controllers.

The working principle of the JANTX4N47A involves the application of electrical power to the LED input side which then projects an infrared beam of light through the device. This in turn creates a corresponding photovoltaic current in the transistor output side. The transistor output is then able to provide control or signal isolation up to the maximum collector current and saturation voltage limits of the optoisolator. This provides both circuit isolation and safety CMR protection, allowing two isolated, galvanically connected circuits to share a common ground.

In summary, the JANTX4N47A is a form of optoisolator - Transistor, Photovoltaic Output with a wide range of application fields, such as automotive, industrial, telecom, and security. It functions by using infrared light to activate the photovoltaic transistor and produce a collector current that is proportional to the LED input current. This optoisolator provides circuit isolation and safety CMR protection up to the maximum collector current and saturation voltage limits, creating a safe and isolated environment for the circuits.

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