LT3591
Linear Technology
Demonstration circuit 1124 is an LED Driver with Integrated Schottky in 3mmx2mm DFN featuring the LT3591.
Design DocumentAnalog
DC1124A: LT3591 LED Driver with Integrated Schottky Demonstration Circuit User Guide
Quick start guide for the DC1124A demonstration circuit featuring the LT3591 step-up DC/DC converter for driving up to 10 white LEDs at 20mA.
Overview
The DC1124A is a demonstration circuit for the LT3591, a fixed-frequency step-up current mode DC/DC converter designed to drive up to ten white LEDs in series. The board operates from an input voltage range of 3V to 9V and provides a constant 20mA output current. The integrated LT3591 includes an internal Schottky diode and open-circuit protection within a 3mm x 2mm DFN package to minimize external component count. It features high-side current sensing for simplified LED return paths and supports multiple dimming methods, including filtered PWM, direct DC, and direct PWM dimming. The document provides technical specifications, setup procedures, and measurement techniques for evaluating the driver's performance.
Use Cases
- Backlighting for portable electronics
- Driving white LED strings in series
- Space-constrained LED lighting designs
- Constant current source applications
- High-efficiency boost conversion for LEDs
Topics
LT3591
DC1124A
Analog Devices
Linear Technology
LED Driver
Step-Up Converter
Boost Converter
Integrated Schottky Diode
DFN Package
PWM Dimming
White LED Driver
Constant Current Source
Referenced Parts
| LT3591 | Linear Technology | Demonstration circuit 1124 is an LED Driver with Integrated Schottky in 3mmx2mm DFN featuring the LT3591. |