ISL97632IRT14Z-T

PMIC - LED drivers are used for a wide range of applications, from high power lighting applications for large vehicles to lighting for small consumer products. The ISL97632IRT14Z-T from Intersil is a low-cost, high-efficiency, and versatile synchronous buck regulator that is perfectly suited for driving power-hungry LEDs.

High Efficiency Synchronous Buck Regulator

The ISL97632IRT14Z-T is an advanced synchronous buck regulator that is designed to support a wide variety input voltages and power requirements, making it an ideal candidate for a diverse range of LED driver applications. It offers high levels of output current accuracy, low quiescent current draw, and a wide input operating voltage range, making it suitable for a variety of LED driver applications.

The regulator consists of two main parts, an output power stage that delivers the LED current, and a controller which is responsible for regulating the LED current. The output stage is composed of MOSFETs and choke coils to ensure stable, clean output current and voltage, while the controller includes a voltage loop with voltage mode PWM regulation to maintain the LED current at a steady level.

The ISL97632IRT14Z-T features an integrated single-phase MOSFET bridge driver that eliminates the need for an external MOSFET. This allows for simpler design and shorter response time, as the controller and power stages are now connected in a single, integrated package.

Flexible Topology

The ISL97632IRT14Z-T has two topological implementation options - a single-inductor or dual-inductor implementation. In a single-inductor implementation, all of the components, including the MOSFET, inductor, and choke coils, are integrated into a single, small-footprint component. This reduces board space, component count, and cost, while also improving system efficiency.

In a dual-inductor configuration, the two coils share a common node which reduces noise and improves system efficiency. This configuration is more suitable for applications that require a higher output voltage or for driving multiple LEDs in parallel.

Advanced Protection Features

The ISL97632IRT14Z-T features a range of advanced protection features to ensure the safe and reliable operation of the LED driver. These features include over-temperature protection, which shuts down the regulator when the die temperature exceeds a certain threshold to prevent catastrophic failure. In addition, there is over-voltage protection which shuts down the regulator if the input voltage exceeds the specified absolute maximum rating, and overcurrent protection which shuts down the regulator if the output current exceeds the rated current limit.

Conclusion

The ISL97632IRT14Z-T is an advanced, low-cost synchronous buck regulator that is ideally suited for driving power-hungry LEDs. It offers high levels of output current accuracy and efficiency, a wide input voltage range, and two topological implementation options, making it highly versatile and suitable for a wide range of LED driver applications. In addition, the device also features a range of advanced protection features to ensure the safe and reliable operation of the LED driver.