HCPL-261A-560E Isolators

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Optoisolators - Logic Output is a type of optocoupler family. It is a light-controlled voltage relay with a control input and a logic output. The most common is the HCPL-261A-560E optoisolator from Avago Technologies.

The HCPL-261A-560E is a surface-mount optoisolator housed in a small 8-Pin DIP. Its control input is an LED, which is sensitive to both visible and infrared light, so it can be used for a wide range of application fields. The output circuit is an open-collector Darlington transistor with a maximum output voltage of 30V and a maximum collector current of 100mA.

The working principle of the HCPL-261A-560E optoisolator is based on the light transmission. When an LED is energized, it produces light that is received by a light sensitive phototransistor. The phototransistor changes the input voltage to the output voltage (1V to 30V). When the LED is not energized, the output of the device is typically about 0.4V.

The HCPL-261A-560E optoisolator can be used in numerous application fields. Its most common application is in digital logic potential separation. It can be used in simple logic circuits to keep the output current away from the logic input, thus preventing damage to sensitive electronic parts due to any interference or false triggering. It can also be used as a “light switch” for additional input levels, such as when switching between low and high voltages. It can also be used as a level shifter or a voltage regulator.

As for its working principle, the HCPL-261A-560E optoisolator is based on the LED-phototransistor optical coupling. The LED is energized and emits light, which is received by the phototransistor. The phototransistor changes the input voltage to the output voltage, which can be controlled by varying the current to the LED. The current output from the phototransistor is typically an open-collector Darlington transistor, with a collector voltage of up to 30V and a maximum collector current of 100mA.

In conclusion, the HCPL-261A-560E optoisolator from Avago Technologies is a light-controlled voltage relay with a control input and a logic output. It has a wide range of application fields, such as digital logic potential separation, level shifting, and voltage regulation. Its working principle is based on the LED-phototransistor optical coupling, which changes the input voltage to the output voltage.

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