EL814S1(TU)-V

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Optoisolators - Transistor, Photovoltaic Output

Optosolators are electronic circuits that provide electrical isolation between its input and output by using a light source, typically an LED, to transfer an electrical signal between two isolated circuits. They are ideal for situations where extreme electrical isolation is necessary and other forms of electrical isolation, like isolation transformers, cannot directly meet the specifications of the application. One example optoisolator widely used is the EL814S1(TU)-V, which consists of a photovoltaic infrared LED and a single NPN Darlington transistor output.

Application Field

EL814S1(TU)-V optoisolators are widely used in various applications, such as industrial controllers, medical equipment, printed circuit boards, smart meters, home appliances, industrial process control, and various other areas. Due to their extreme electrical isolation, they are an essential component for protecting sensitive electronics.

In addition, due to their low leakage current, high isolation voltage rating, very high susceptibility, and reliable temperature stabilization, they offer excellent performance for applications requiring insulation safety and protection from external electrical noise.

Working Principle

The EL814S1(TU)-V optoisolator consists of a photovoltaic infrared LED used as a sensing element, and a single NPN Darlington transistor output. The LED is a semi-conductor device that emits light when an electrical current is applied. When the LED is illuminated, the photovoltaic effect occurs in the transistor base and the voltage applied to the base is transferred to the collector, which then drives the load.

The LED is used in this optoisolator as a single-channel isolated input, leading to a higher voltage value for the output. This allows the device to withstand higher isolation voltage compared to other single channel optoisolators. Additionally, the NPN Darlington transistor output offers lower-power consumption and a higher voltage gain compared to other optoisolators.

In summary, due to its high electrical isolation, low power consumption, and higher voltage gain properties, the EL814S1(TU)-V optoisolator is well-suited to a variety of application fields and offers superior performance in situations requiring electrical isolation.

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