Product Overview: LT1937D - High Efficiency LED Driver

The LT1937D from Linear Technology is a highly compact, high-efficiency, constant-current LED driver designed to cater to a wide array of lighting solutions. Its small form factor and high performance make it an ideal choice for portable and battery-powered applications, such as handheld devices, backlighting for LCD displays, and LED flashlights.

Key Features

• Wide Input Voltage Range: The LT1937D operates over a 2.5V to 16V input voltage range, accommodating various power sources and ensuring versatility across different applications.
• High Efficiency: Capable of up to 84% efficiency, this LED driver conserves power and extends battery life, making it suitable for energy-sensitive devices.
• Constant-Current Output: The driver provides a constant current for LED arrays, which is critical for maintaining consistent brightness and color over time.
• Adjustable Output: Users can set the output current with a single external resistor, offering flexibility and customization for specific lighting needs.
• Low Profile: The LT1937D comes in a tiny, low-profile (1mm) ThinSOT package, making it an excellent choice for space-constrained applications.
• Integrated Schottky Diode: An internal 40V, 400mA Schottky diode simplifies the design and reduces external component count.
• Soft-Start Capability: This feature limits inrush current during startup, providing protection for the LEDs and power source.

Applications

• Portable Lighting
• Handheld Devices
• LCD Backlighting
• Automotive and Avionic Lighting
• General Purpose LED Illumination

The LT1937D is not only a reliable and efficient solution for driving LEDs but also offers a high degree of functionality in a compact package. Its robust design and ease of use make it an excellent choice for engineers and designers looking to enhance their lighting applications with a dependable LED driver.