ISL97672BIRZ-T

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ISL97672BIRZ-T is an LED driver produced by Intersil Corporation, a high-performance, low-cost driver that bridges the gap between analog intensity adjustment and LED performance. This device features high efficiency, low voltage operation, and versatile current regulation. It is ideal for battery-operated applications that require efficient lighting performance and a selection of control modes.

Features

• High efficiency
• Low voltage operation, 1.6 to 36V
• Versatile current regulation
• Multiple control interfaces: Analog current setting and PWM
• Output Current scaling from 0.2 to 1A
• OVERBOOST™ protection circuit with soft-start
• High power up to 36V and up to 1A current
• Programmable dimming interface
• Very low quiescent current

Application Fields

ISL97672BIRZ-T is ideal for a wide range of applications including consumer electronics, automotive, and general lighting. It can be used in systems that require efficient and low-cost LED lighting performance. In consumer electronics, it is widely deployed in cell phones, GPS devices, and other small handheld devices that require efficient lighting performance. In automotive applications, it is used to provide reliable and efficient LED-based lighting, such as backlighting control in navigational systems, warning and indicator messages, and interior lighting. In general lighting, this driver can be used to provide efficient performance and high power LED lighting, such as street lights and other similar outdoor sources of illumination.

Working Principle

The ISL97672BIRZ-T LED driver is based on a constant-current buck topology. It consists of a voltage regulator, inductor, output capacitor, sense resistor and two control circuits. The voltage regulator accepts an input voltage, typically from a battery, and maintains a steady output current to the LED load. The inductor stores energy from the input voltage and provides pulses to the LED load, while the output capacitor filters the pulses to provide a steady current to the LED load. The sense resistor is used to measure the current through the LED load and provides feedback to the switching control circuits. The switching control circuits adjust the duty cycle of the voltage regulator, as well as the pulse width, to regulate the output current to the LED load.

The ISL97672BIRZ-T supports multiple control interfaces, including analog and PWM. The analog interface allows for linear current control with a wide range of dimming options, while the PWM interface provides faster response time and higher accuracy in current regulation. In addition, the device also has an OVERBOOST™ protection circuit which ensures safe operation of the device by preventing over-current, overtemperature, and short-circuit events.

Conclusion

ISL97672BIRZ-T is a high performance, low-cost LED driver from Intersil Corporation and is ideally suited for a wide range of applications that require efficient and low-cost LED lighting performance. The device supports multiple control interfaces, high efficiency and low quiescent current. With its OVERBOOST™ protection circuit and versatile current regulation, ISL97672BIRZ-T is an ideal choice for battery-operated applications requiring reliable lighting performance and excellent dimming control.

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