LT3795EFE#PBF

Overview

The LT3795EFE#PBF is a high-voltage, single-output DC-DC LED driver controller from Analog Devices (Linear Technology). It is a controller-only device (no internal switch) intended to regulate LED current using an external power MOSFET and sense resistor, and it supports both analog and PWM dimming. The device accepts a wide supply range (listed as 4.5 V to 110 V) and supports switching frequencies from 100 kHz up to 1 MHz, enabling compact magnetics for high-frequency designs.

Why Choose This Part

Practical reasons to choose this controller include its very wide input-voltage range and high maximum switching frequency, which let designers support long LED strings and minimize magnetics size. Because it is a controller without an internal switch, you can select an external MOSFET sized for your voltage, current, and thermal needs, improving flexibility and thermal performance. Built-in dimming support (analog and PWM) and a broad operating temperature range make it suitable for rugged commercial and automotive applications.

Applications

Getting Started

Begin by downloading the LT3795 datasheet and any Analog Devices reference or demo board materials for layout guidance. Plan for an external power MOSFET and a precision current-sense resistor sized for your LED current; pay careful attention to PCB layout around the sense resistor, MOSFET, and switching node to minimize noise. Use an evaluation board or a breadboarded reference design to verify component choices, dimming behavior, and thermal performance before finalizing the PCB.