EL3H7(D)(TB)-VG

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Optoisolators are used to electrically isolate two circuits in order to protect the electrical integrity of a system from harmful impacts of high voltages, electric noise, and transients. An optoisolator typically includes an LED, photodiode, or other light-detection element and an optically isolated output element, which can include a transistor. Photovoltaic outputs are also available, which eliminates the need for an LED or photodiode in the optoisolator.

The EL3H7(D)(TB)-VG is an optically isolated output transistor of the photovoltaic output type. It features an input stage composed of a high-efficiency photovoltaic element, a four-terminal high-gain saturated amplifier, and an additional common-collector current output stage to ensure high accuracy and stability of output voltage and current. The package of the EL3H7(D)(TB)-VG is hermetically sealed and has a high level of heat resistance. The EL3H7(D)(TB)-VG is rated for an operating temperature of -55° to +135°C with operation at up to 150°C.

The EL3H7(D)(TB)-VG has a wide variety of applications in the fields of industrial automation, robotics, communication and control. It can be used as an input isolator for interface circuit between industrial environments, as well as a logic isolator for digital and signal protection. It is also well suited for use in switching mode power supplies, motor control systems, and relays.

The working principle of the EL3H7(D)(TB)-VG is based on the photovoltaic effect. This effect occurs when a photon in the visible light spectrum is absorbed by subatomic particles of matter. The absorbed photon transfers energy to the particles of matter, which causes them to move and create a voltage difference, or photovoltaic potential. In an EL3H7(D)(TB)-VG, light from an LED is absorbed by a photovoltaic element, creating a voltage difference. This voltage difference then drives a four-terminal, high-gain saturated amplifier. The amplifier provides a logic level output, which is used to drive the additional common-collector current output stage. The output stage then converts the logic level signal into a higher current signal, providing functionally isolated output.

The EL3H7(D)(TB)-VG is an efficient optically isolated output transistor with a wide variety of applications in industrial automation, robotics, communication, and control. Its inner working relies on the photovoltaic effect, taking advantage of the energy of photons in the visible light spectrum to produce an electrically isolated output. With its high efficiency, heat resistance, and flexibility, the EL3H7(D)(TB)-VG is well suited for use in a variety of industrial settings.

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