TLP759(J,F)

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Optoisolators are used to provide electrical isolation between two circuits, which makes them a great choice for any system that requires a protected and reliable link between two components. The TLP759(J,F), which falls into the category of Transistor, Photovoltaic Output Optoisolators, is a simple yet effective device that can be used across a range of applications. It is particularly useful in situations where there is an especially high voltage or current that needs to be isolated from the system. In this article, we will explore the TLP759’s application field and working principle in detail.

Application Fields

The TLP759 is designed for use as a logic isolator, meaning it is used to provide isolation between two different logic blocks within a system. It is especially suited for use in applications that require high speed data transfer, such as in high-speed CPUs, video systems, and high-speed digital communication systems, as it has a fast rise time of 10ns. With a high isolation voltage rating of 2500Vrms, the TLP759 is very effective in providing isolation between high-voltage blocks. Additionally, its extremely low current consumption of 10uA makes it very suitable for use in power sensitive applications.

In terms of operational temperature range, the TLP759 is designed for use in a wide variety, from -40 to +85 degrees Celsius. This makes it a great choice for use in a range of harsh environments, such as those with extreme temperatures or high levels of dust or other particulates. This versatility makes the TLP759 a reliable choice for applications and systems with fluctuating requirements, or where unusual environmental conditions must be expected or accounted for.

Working Principle

The TLP759’s working principle is simple and effective. It consists of an input stage, output stage, optocoupler, and output amplifier. The input stage is a PNP transistor, which takes in the input signal from the logic block, and amplifies it to a level that is suitable to the optocoupler. The optocoupler consists of a gallium arsenide infrared emitting diode (GaAIr), and a photodarlington transistor. As the input signal is amplified by the PNP transistor, the GaAIr diode emits an infrared beam which causes the photodarlington transistor to switch. This photodarlington acts as the output amplifier, and switches to allow the sensing of the output from the logic stage.

In this way, the TLP759 is able to effectively isolate the two logic stages, while still allowing low-current signals to be sensed easily. With its high isolation voltage and fast rise time, it is a great choice for applications and systems that require shielding from power surges, or for the easy transfer of high-speed digital data. Additionally, its low current consumption makes it a great choice for battery powered applications.

Conclusion

The TLP759 is a great choice for any application requiring the isolation of two logic stages or high-speed data transfer. Its high isolation voltage, low current consumption, and temperature range make it very effective in these situations, particularly where the environmental conditions may be difficult or unpredictable. We have explored the TLP759’s application field and working principle in this article, and have seen how it can be an invaluable component for many systems.

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