TLP626(F)

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TLP626(F) Application Field and Working Principle

The TLP626(F) optoisolator series with transistor, photovoltaic output combines the input isolation of an optocoupler and the input-to-output signal timing of a digital circuit. It provides direct galvanic protection for controlling analog and digital optoelectronic loads while isolating low-level signal sources from high-voltage outputs. Typica applications include high-voltage isolation between industrial control devices and digital systems, low-level analog traction, analog/digital isolators and optocoupler drive circuits.

Principle of Operation

The TLP626(F) optoisolator series is an LED-driven transfer component based on an integrated circuit. The photovoltaic output is made up of two photodiodes connected in series and its purpose is to transfer the electric signal from the LED side to the output side without making electrical contact. One photodiode works as a current generator, and the other as a voltage generator. The circuits are optically isolated from the input and output side and provide a low-power path for transmitting electrical signals. This component is also provided with a reverse blocking device and a capacitor to reduce voltage spikes.

The LED and the photodiode are physically isolated, but they are optically connected. Light from the LED generated on the input side is converted into a current on the output side and then driven into an output transistor to provide the required high-voltage output.

Advantages of TLP626(F)

The TLP626(F) optoisolator series offers the advantage of good isolation and high reliability. It has an integrated ESD protection diode, which provides an additional level of protection from surges and spikes. The optical isolation also ensures no electrical contact between input and output, allowing for low-level signal transmissions with no loss in the signal quality. Additionally, the reverse-blocking circuit prevents backflow of high voltage current through the LED.

The TLP626(F) optoisolator series can handle up to 1100V isolation voltage and is optimised for operating temperatures up to 105°C. It also comes with a reduced PCB space for design flexibility.

Applications

The TLP626(F) optoisolator series is suitable for a wide range of applications. These include industrial control systems, such as motor control, process automation, and power management, as well as automotive and railway traction control and BLDC motor control. It can also be used for voltage monitoring and high-voltage signal transmission in electronic equipment. In addition, it can be used for signal isolation between digital and analog signals, as well as for driving LEDs or other optoelectronic loads.

The TLP626(F) optoisolator series offers high accuracy and high dynamic range for reliable signal transmission. It is also optimized for operating temperatures up to 105°C, making it suitable for harsh industrial environments. This optoisolator series is available with many features, ensuring its reliability and performance in a variety of applications.

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