LT3476IUHF#TRPBF

PMIC - LED Drivers

Introduction

The LT3476IUHF#TRPBF is a high-efficiency step-down LED driver that regulates and maintains constant current to the LED load. It is a highly integrated switch-mode current controller optimized for driving high brightness LEDs with a constant current regulated output of up to 50V.

Application Field

The LT3476IUHF#TRPBF is most commonly used in applications such as automotive headlights, rear combination lamps, and industrial lighting. It can also be used in other types of LED lighting such as down-lighting, accent lighting, and linear lighting.

Working Principle

The LT3476IUHF#TRPBF features a high-frequency sync step-down design with an internal switching regulation circuit that operates with a maximum efficiency of 95%. The buck converter generates a constant current output regardless of LED forward voltage, ambient temperature or LED current variation, allowing the LED to remain bright while maintaining a constant temperature.

In addition, the LT3476IUHF#TRPBF incorporates a precision voltage reference and programmable current limit circuit that monitors the current in the LED string and adjusts the output current in accordance with it. This ensures that the LED current remains constant and prevents the LED from becoming over driven or over heated.

The LT3476IUHF#TRPBF also features a wide input voltage range from 4.5V to 50V, making it suitable for a variety of LED power supplies.The adjustable output current range is 0A to 2.6A and it supports a wide range of LED dimming methods such as Pulse Width Modulation (PWM) dimming, Analog Voltage dimming, and Burst Current Dimming (BCD).

Conclusion

The LT3476IUHF#TRPBF is a high-efficiency step-down LED driver designed for driving high-brightness LEDs with a constant current regulated output. It is highly integrated with multiple protection and dimming functions, making it suitable for a variety of automotive and industrial lighting applications.