LTC3217EUD#PBF - LED Driver from Linear Technology

The LTC3217EUD#PBF is a highly integrated and efficient LED driver designed by Linear Technology, now part of Analog Devices, for powering large LED arrays in portable devices. This compact, charge-pump-based driver is suitable for applications such as camera flashes, backlighting for displays, and other lighting solutions where space is at a premium and high performance is required.

Key Features:

• Flexible Power Source: The LTC3217EUD#PBF can operate from a 2.9V to 4.5V input voltage range, making it compatible with a wide range of battery technologies.
• High Efficiency: With 1x, 1.5x, and 2x charge pump modes, the device automatically optimizes efficiency based on LED forward voltage requirements.
• Adjustable Current Control: It offers precision internal current limiting to drive up to six LEDs with currents up to 30mA each, which can be adjusted via an external resistor.
• Gradual Current Ramp: The Soft-Start feature limits inrush current during start-up, providing a gradual current ramp for the LEDs.
• Thermal Protection: Built-in thermal shutdown protects the device under high-temperature conditions.

Applications:

• Smartphone and tablet camera flashes
• Portable device backlighting
• General LED lighting

Package and Reliability:

The LTC3217EUD#PBF comes in a compact, low-profile (0.75mm) 16-lead QFN package, which is RoHS compliant and designed for reflow soldering, facilitating easy integration into a variety of designs. The device is specified over the -40°C to +85°C temperature range, ensuring reliable performance across a wide range of environmental conditions.

Design Support:

Linear Technology provides comprehensive design resources, including datasheets, application notes, and design simulation tools to assist engineers in implementing the LTC3217EUD#PBF into their projects efficiently and effectively.