EL3H7(B)(TA)-VG Isolators

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Optoisolators are optoelectronic devices used to control electrical signals without physical contact between input and output. The EL3H7(B)(TA)-VG optoisolator is a transistor, photovoltaic output device from Everlight, suitable for many applications. This article will discuss its application field and working principle.

The EL3H7(B)(TA)-VG is a compact device which combines a light emitting diode (LED) with a silicon transistor photovoltaic output circuit. It has a maximum continuous forward current of 25 mA, an on-state resistance of 1.5 Ω to 3.0 Ω, and a rated output current of 50 mA. The device comes in a small, thermally enhanced 4-pin SIP package with an extended operating temperature range of -40°C to +100°C.

The EL3H7(B)(TA)-VG is widely used in various applications thanks to its high isolation voltage of 2000Vrms, its high photo sensitivity of 50mA/mW, high common mode transients immunity, negligible CTI, high EMC radiation performance, and fast switching speed of 10μs. Some of the most common applications of this optoisolator include switching home appliances and industrial motors; automobile sensors and controls; energy-saving lighting controls; and telecommunications systems.

The working principle of the EL3H7(B)(TA)-VG is based on the concept of opto-electrical conversion. When an electrical signal is sent to the optoisolator, it is converted into light energy by the LED in the device. This light is then received by the photovoltaic transistor in the optoisolator, which produces an electrical output signal, thus providing isolation between the input and output. The output signal is then used to switch a load in accordance with the input signal.

In conclusion, the EL3H7(B)(TA)-VG optoisolator provides a compact and efficient solution for high-efficiency electrical signal control. Its high isolation voltage, high photo sensitivity, negligible CTI and high EMC radiation performance make it suitable for a wide range of applications. Furthermore, its simple opto-electrical working principle makes it easy to integrate into other electronic systems.

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