The LT3519 LED driver is a 4W LED driver with an integrated 750mA 45V peak power switch, integrated compensation components and an integrated low leakage Schottky diode. It is suitable for a wide variety of applications, including LCD displays, automotive and avionic applications, architectural and industrial lighting, portable projection and scanners.
This document presents design applications for the Linear Technology LT3519, a medium power (1W-4W) LED driver. Key features include an integrated 750mA 45V peak power switch, compensation components, and a low leakage Schottky diode within a 16-pin MSOP package.
The text details two specific circuit examples: a 4W boost LED driver capable of driving up to 38V at 100mA with 89% efficiency, and a 2.4W SEPIC topology providing short-circuit protection. The device supports both PWM and analog dimming for brightness control.
The LT3519 features a 400kHz switching frequency.
The internal power switch has a rating of 750mA.
The integrated Schottky diode has a peak voltage rating of 45V.