ELW136

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators, also known as optocouplers and photocouplers, are electronic devices used to couple electrical energy from one circuit to another. They use an optical element to maintain the isolation of the circuits and provide protection from transients. The ELW136 is a type of optoisolator designed to be used in applications in which electrical isolation is required, such as in regulating or switching power circuits. This article provides an overview of the ELW136 application field and working principle.

ELW136 Application Field

The ELW136 is designed to provide electrical isolation between the input and output circuits while regulating or switching power supplied to the output circuit. It is suitable for use in applications including LED drivers, lighting, power supply control, and other low voltage DC circuits. It is available in a variety of packages and configurations to suit different application requirements.

The ELW136 is designed to operate as a half-wave or full-wave DC-DC converter. An input voltage is applied to the anode terminal while the output voltage is supplied to the cathode terminal. The ELW136 is designed to switch on when the input is applied and switch off as the input is removed. Additionally, the ELW136 can be used in a wide range of applications to control the power supply of a circuit and regulate the output voltage.

ELW136 Working Principle

The ELW136 is a type of optoisolator, which uses an electro-optic element to couple the input and output circuits. The optoisolator is designed to provide electrical insulation between the input and output circuits, while allowing light to pass from one circuit to the other. In the ELW136, the optoisolator is composed of a light-sensitive transistor and a photovoltaic device. The light-sensitive transistor is connected to the anode terminal and serves as the input to the optoisolator. When the input voltage is applied to the anode, the light-sensitive transistor conducts current, which is then transferred to the photovoltaic device.

The photovoltaic device consists of a photodiode and a light-emitting diode (LED). The photodiode acts as a detector, converting the light signal produced by the LED into a voltage signal. This voltage signal is then fed back to the cathode terminal of the optoisolator, which serves as the output terminal of the device. Once the output voltage is applied to the cathode terminal, the ELW136 switches on and begins to regulate or switch power supplied to the output circuit.

In addition to providing electrical insulation between circuits, the ELW136 also helps protect the circuitry from transient electrical disturbances. The optoisolator ensures that any electrical noise that occurs on the input circuit is not transferred to the output circuit. This helps to avoid problems such as damage or incorrect operation of the output circuit due to electrical disturbances.

Conclusion

The ELW136 is an optoisolator designed to provide electrical isolation between two circuits. It is suitable for use in a wide range of applications, including LED drivers, lighting control, and power supply regulation. The optoisolator is composed of a light-sensitive transistor and a photovoltaic device which work together to ensure electrical insulation while allowing the transfer of light signals. The ELW136 also provides protection from transient electrical disturbances, thus helping to protect the output circuit from damage or incorrect operation.

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