TLP385(D4YH-TL,E

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Optoisolator technology is used in a wide variety of applications where electrical isolation between one circuit and another is required. The TLP385 (T4YH-TL,E) optoisolator is one example of this technology that is typically used in a number of different applications. In this article, we will discuss the application field and working principle of the TLP385.

Application Field

The TLP385 is designed to be used as an electrical isolation device, allowing two separate circuits to exchange information while maintaining electrical isolation between the two. It is primarily used in applications such as industrial motor controllers, programmable logic controllers, automation systems, and thermostats. It is also used in the automotive industry as a part of engine controllers and airbag systems, as well as in medical equipment such as syringe pumps, infusion pumps, and ventilators.

The TLP385 is mostly used in applications that require high-speed data transmission and signal amplification. It is specifically designed to be used with PWM signals, allowing it to be used to accurately sense signals within a wide range of frequencies. It is also designed to be very reliable, with a proven reliability of over 1 million operating hours.

Working Principle

The TLP385 optoisolator works by using a photodarlington transistor output, consisting of an LED and phototransistor, to transfer electrical signals across two separate circuits while isolating them from each other. When a voltage is applied to the LED, it emits light, which is then detected by the phototransistor and converted into an electrical signal. This signal is then amplified and sent to the output circuit.

The photodarlington design of the TLP385 allows it to have a higher gain than other optoisolator designs, resulting in greater signal fidelity and a higher frequency response. Additionally, the device also features a reverse polarity protection diode and internal thermal shut-down circuitry, which protect it from damage that may be caused by accidental reversing of the power supply or by high temperatures.

In conclusion, the TLP385 is a highly reliable optoisolator that is designed for use in a wide range of applications where electrical isolation between two circuits is required. It is capable of transmitting signals at high speeds and with high fidelity, making it an ideal choice when precise signal isolation is needed.

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