H11F13S

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Optoisolators are devices used to transfer electrical signals between two separate circuits that are electrically isolated with the help of light. The H11F13S optoisolator belongs to the transistor, photovoltaic output category and is used in various applications that require signal isolation.

H11F13S Description

The H11F13S optoisolator is a 4-pin plastic-encapsulated package with a transistor, photovoltaic output. It consists of an infrared light-emitting diode (LED), a phototransistor detector and an integrated circuit, all sealed in a plastic package. The phototransistor has a voltage transfer characteristic (VTC) of guaranteed 5V. The electrical isolation between the input and output is up to 5kV. The device comes with an operating temperature range of -40°C to 85°C and a storage temperature range of -40°C to 125°C. It is RoHS compliant and UL recognized.

H11F13S Application

The H11F13S optoisolator is mainly used to provide electrical isolation for logic signals, especially in low voltage bidirectional data transmission systems. It is also used for preventing ground loops, electromagnetic interference (EMI) and field interference. It can also be used in switching applications, such as motor control, where the output signals must be isolated from the external environment and the power supply. Additionally, it can be used to isolate analog signals, such as in powe supplies, communications systems and motor speed controllers.

H11F13S Working Principle

The H11F13S optoisolator works in a similar way as any other optoisolator. An infrared LED emits light when current is applied to it. This light is received by the phototransistor, triggering a voltage across its junction. The voltage across the junction is proportional to the input current and when the voltage reaches a certain threshold, the transistor switches ON. This action triggers an electrical signal in the integrated circuit which, in turn, is used to generate and supply an output. This output is used to power the external load or to control the on-off state of another circuit. By isolating the input and output signals using the optoisolator, interference between the circuits is prevented.

Conclusion

The H11F13S optoisolator is a 4-pin plastic-encapsulated package with a transistor, photovoltaic output. It is used in various applications that require signal isolation, such as logic signal isolation, prevention of ground loops, and EMI prevention. Its working principle is based on the phototransistor receiving light emitted from the LED and triggering a voltage across its junction. Once passed a certain threshold, an electrical signal is generated and outputted to control an external device.

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