ISL6721AARZ

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The ISL6721AARZ is a member of Intersil’s I²C controlled voltage regulator/direct flash LED driver family of products. This device is designed to provide adjustable output voltage regulation, active current limit and short-to-short circuit protection in applications such as industrial and consumer controls, monitors, printers and portable equipment. The ISL6721AARZ provides a overvoltage protection circuitry that incorporates a foldback limiting scheme in both local loop and remote loop two phase applications.

Application Field

The ISL6721AARZ is designed specifically for providing voltage regulation for industrial and consumer controls, monitors, printers and other portable equipment. With its precise voltage regulation circuitry, the device is ideal for applications where a controlled voltage supply is needed over a large variation in load conditions. Additionally, its low voltage drop and low quiescent current make it suitable for a large range of operating conditions. Additionally, its active current limit and short-to-short circuit protection functionality makes the device suitable for use in safety-critical applications.

Working Principle

The ISL6721AARZ utilizes a variable duty cycle buck topology in order to regulate an output voltage that is proportional to the bias voltage supplied to an adjustable internal reference. The feedback compensation is provided by means of an external resistor divider that can be set to provide either a fixed or adjustable output voltage. The device is designed to operate with either a fixed frequency or with frequency modulation that can be used to reduce noise emissions and minimize EMI. Additionally, the device offers overvoltage protection circuitry, active current limit and short-to-short circuit protection features to ensure safe and reliable operation in a wide range of applications.

Conclusion

The ISL6721AARZ provides adjustable output voltage regulation and current limit protection for industrial and consumer controls, monitors, printers and other portable equipment applications. This device utilizes a variable duty cycle buck topology in order to regulate an output voltage that is proportional to the bias voltage supplied to an adjustable internal reference. Additionally, the device supports overvoltage protection, active current limit and short-to-short circuit protection, providing a robust and reliable solution for a variety of different applications.

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