VO615A-7

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Optoisolators are used to provide electrical isolation between sensitive circuits and the outside, potentially hostile environment. This type of device, also referred to as optocouplers, are often used in mission-critical systems to protect against electrical shocks, voltage spikes, and electromagnetic interference (EMI). The VO615A-7 is a photovoltaic output transistor optoisolator and contains an infrared LED emitter, an NPN phototransistor for output, and a silicon substrate for electrical isolation of the two components. It is a versatile and robust module designed to provide both electrical isolation and signal amplification.

Construction and Working Principle

The VO615A-7 optoisolator is a single-channel, double-transistor type with a photovoltaic output transistor. It consists of a surface-mount (SMT) 8-pin package containing an infrared LED emitter, an NPN phototransistor for output, and a silicon substrate for electrical isolation of the two components. The main body of the module has an opaque black top and bottom, and a transparent window in the center that allows the infrared LED to emit its light while being protected from the outside environment. The output phototransistor is mounted on its substrate, with the legs extending through the bottom of the module. The microphone’s terminals are arranged in two separate rows.

The optoisolator works based on the principle of light-induced current. When an LED emitter is connected to a power source, it emits light in the infrared range. This light is directed upward, towards the phototransistor. The phototransistor is made of a material that changes its electrical properties when it is exposed to infrared radiation. This triggers the phototransistor to switch on, creating an electrical connection between its input (collector) and output (emitter) terminals. This creates a current that is amplified by the phototransistor and passed to the output terminal of the optoisolator. The current then passes through a load, completing the circuit.

Applications

The VO615A-7 optoisolator is widely used in mission-critical systems such as automotive lighting systems, medical equipment, military systems, and industrial control systems. It is also used in applications where electrical isolation is needed, such as telecommunications, instrumentation, and computers. Additionally, it is used in AC/AC and AC/DC converters for regulating electrical signals. Due to its isolation properties, the optoisolator can be used to protect against electrical shocks caused by voltage spikes and EMI from external sources. It is robust and can handle high levels of voltage and current, making it suitable for many industrial and commercial applications.

The VO615A-7 optoisolator is an indispensable module for providing electrical isolation and signal amplification, making it a popular choice for mission-critical applications. Its large window and compact design make it easy to mount and incorporate within existing circuits. Its robust construction ensures reliable operation in harsh environments, and its high switching frequency and speed make it suitable for many different tasks. With its versatile features and durable construction, it is a go-to choice for many types of applications.

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