The LT3491EDC is a highly efficient, current mode PWM boost DC/DC converter designed to drive LEDs. Manufactured by Linear Technology, this compact module is an ideal solution for powering single or multiple LEDs in a variety of applications, including portable lighting, backlighting for displays, and automotive lighting systems.

Key Features

• Integrated Schottky Diode: The LT3491EDC includes an integrated Schottky diode, which simplifies the design and reduces external component count.
• Wide Input Voltage Range: It operates from an input voltage range of 2.5V to 16V, accommodating a variety of power sources from batteries to automotive inputs.
• Adjustable Output Voltage: The output voltage is adjustable up to 40V, enabling the driver to power a string of LEDs in series, ensuring consistent current and brightness across each LED.
• High Switching Frequency: A switching frequency of up to 2.1MHz allows for the use of small, low-cost capacitors and inductors, resulting in a compact and cost-effective design.
• True Color PWM Dimming: The LT3491EDC offers true color PWM dimming, which delivers constant LED color with varying intensity levels.

Performance and Protection

The device provides excellent thermal performance thanks to its low-profile (1mm) 6-pin DFN package. In addition, it features internal thermal shutdown and current limiting to protect against over-temperature and over-current conditions. An open LED protection is also integrated to prevent damage to the driver when the LED string is disconnected.

Applications

• Portable LED Lighting
• Display Backlighting
• Automotive and Avionic Lighting
• General Purpose LED Illumination

With its robust feature set and compact form factor, the LT3491EDC from Linear Technology stands out as a versatile and reliable choice for LED driving applications where space is at a premium and efficiency is paramount.