ELW2601

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Optoisolators – Logic Output make use of an infra red light-emitting diode and a phototransistor in an optically isolated package in order to separate the input from the output. As such, logic output opto-isolators are widely used in electrical circuits where two input wires being connected create an electrical short circuit, and thus require isolation of the input from the output.

The ELW2601 is among the most popular logic output opto-isolators, featuring an isolated 6-pin SOT-23 package. It employs a single infra-red light emitting diode (LED) as its primary input, and is internally connected to a phototransistor, which is the output driver. With an input current of 1.5mA as well as a forward voltage of 1.9V, the ELW2601 is able to provide a collector current of 50mA at an output voltage of 32V Vcc.

The working principle of the ELW2601 lies in its optical isolation design. When the LED is in its quiescent state, it consumes very little current. The phototransistor, however, remains in its open state consuming no current. When the LED is powered and the input voltage applied, it emits light which activates the phototransistor, allowing current to flow through it and thus connecting the output circuit.

The ELW2601’s application field is diverse, making it a popular choice among industrial and consumer electronics products. Its main application includes powering relays, driving motors, controlling switchboards, handling alarm systems, and executing interactive circuits among input and output. This opto-isolator is also able to provide a powerful signal driving power, with a TTL compatible model and separately available CMOS model with a power supply of 5V, 10V, 15V, or 24V, making it a great choice for many applications.

In conclusion, the ELW2601 is a widely-used logic output opto-isolator, featuring a 6-pin SOT-23 package and a primary LED with a forward voltage of 1.9V and an operating current of 1.5mA across TTL, CMOS, and some other compatible logic levels. The phototransistor on the ELW2601 is able to achieve a collector current of 50mA and a Vcc of 32V. With the ability to be used in a variety of industrial and consumer electronics applications, the ELW2601 makes a great addition to any circuit, and promises to provide reliable functionality.

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