HCPL-4661-320E

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The HCPL-4661-320E is a solid-state optoisolator device that belongs to the family of Optoisolators - Logic Output. This electronic component was designed to isolate a logic input from an inductive environment, allowing signals to be communicated securely and reliably. In this article we’ll take a closer look at the application field, the working principle, and the features of the HCPL-4661-320E.

Application Field

The HCPL-4661-320E is ideal for driving inductive loads such as relays, contactors, and lamps. It provides excellent isolation between low-level logic driving circuits and higher voltage loads. It can be used in industrial, medical, and aerospace applications wherever reliability and safety are of critical importance.

The device is suitable for a wide range of logic voltage levels, including CMOS, TTL, LVTTL, and 5V VCC. Its over-voltage rating of 150V allows the device to be used in applications that require high protection against voltage peaks and transients. The wide operating temperature range of -55°C to +100°C makes it suitable for extreme environmental conditions.

Working Principle

The working principle of the HCPL-4661-320E is based on the optocoupler or ‘optoisolator’ concept. This innovative component contains a tiny light-emitting diode (LED) that is optically coupled to an integrated phototransistor. When an input signal is applied to the logic input, the current flowing through the LED varies, which directly affects the current levels in the phototransistor. This variance in the phototransistor’s collector-emitter voltage creates a corresponding output signal.

The device utilizes a low forward voltage drop of 1.7V for bi-directional logic, which allows it to be used in low-power applications. The logic output switches at rates of up to 4MHz, making it suitable for fast switching operations. The HCPL-4661-320E also features an integrated Schottky diode for inductive load protection and reverse voltage protection.

Features

The HCPL-4661-320E offers several significant features and benefits. It boasts an isolation voltage rating of 5000V RMS, which ensures high level of protection and reliable operation. It has a wide supply voltage range (3V to 18V) and a low power consumption of 16mA, making it an efficient device for many applications. In addition, the device comes in a 4 pin SOP surface mount package, facilitating compact mounting solutions.

The HCPL-4661-320E also includes built-in internal trimmable resistors for low rise and fall times for fast switching operations. It is capable of delivering output currents of up to 100mA at collector-emitter voltages of up to 80V, making it suitable for driving various loads. Finally, the device has an excellent optical performance, with a wide operating wavelength of 780nm to 830nm.

In conclusion, the HCPL-4661-320E optoisolator device is an outstanding product designed to provide reliable isolation between low-level logic driving circuits and higher voltage loads. With its excellent optical and electrical performance, it is ideal for industrial, medical, and aerospace applications.

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