TLP385(D4-GB,E

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Optoisolators are electrical devices that use optical couplers to isolate two circuits from each other, and the TLP385 (D4-GB,E) is one of the most popular optocouplers available. This device offers extremely high isolation voltage and reliability, as well as excellent CMRR (Common Mode Rejection Ratio) and CTR (Current Transfer Ratio). The TLP385 is ideal for a variety of applications, including switch mode power supplies, I/O line switching, communications, and current sensing.

The TLP385 optoisolator uses a transistor coupled photovoltaic output, consisting of an LED coupled to a phototransistor, and is ideal for switching loads up to 500mA and for providing galvanic isolation as high as 7500VRMS. The LED is activated by an electrical signal, which in turn causes the phototransistor to switch on or off – this process provides the required isolation between two circuits. The advantage of using a transistor coupled photovoltaic output is that it provides a higher level of current drive capability when compared to the traditional optocoupler.

The TLP385 is also a bidirectional optoisolator, meaning that it can be used in both directions between two circuits. This is beneficial because it means that data can be transmitted both ways across the optical barrier. Additionally, the TLP385 has a built-in flyback diode for protection against inductive transients.

The typical operating temperature range for the TLP385 is −40 to +85 °C. As far as electrical parameters, the forward current for the LED is typically 5mA, with a total current of 50mA. The phototransistor collector current can be up to 500 mA, and the input voltage range is 0V to 4V. The output voltage range is −2.0V to +3.0V, and the collector-emitter voltage is typically 90V. The device can handle a maximum input power of 5 mW, and the isolation voltage is 7500 Vrms.

In terms of application, the TLP385 can be used for switch mode power supplies, I/O line switching, communication lines, and for current sensing. It is also perfect for industrial automation and control, as well as any other application requiring high-voltage isolation for both digital and analog signals.

Overall, the TLP385 optocoupler is a great choice for applications requiring extremely reliable and high-isolation voltage. The device offers a high CMRR and CTR, and has a built-in flyback diode for protection against inductive transients. The TLP385 is perfect for a variety of applications, including switch mode power supplies, I/O line switching, communications, and current sensing.

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