LT3477IUF - High Power, Adjustable Frequency, Step-Up DC/DC Converter

The LT3477IUF from Linear Technology is a versatile and robust high power, adjustable frequency, step-up DC/DC converter that is designed to cater to a wide array of applications requiring efficient power conversion. Its unique design and advanced features make it suitable for driving power LEDs, battery charging, and other general-purpose step-up applications.

Key Features:

• Wide Input Voltage Range: The device operates from an input voltage range of 2.8V to 16V, making it suitable for applications powered by single-cell Li-Ion batteries to multi-cell battery stacks or automotive inputs.
• High Output Voltage: Capable of generating output voltages up to 36V, the LT3477IUF is ideal for powering LEDs in series and other high voltage applications.
• Adjustable Switching Frequency: With a switching frequency range from 200kHz to 2MHz, designers can optimize the converter for efficiency or component size. A higher switching frequency allows for smaller external components.
• Integrated Boost Diode: The inclusion of an internal boost diode simplifies the design and reduces the external parts count.
• True Color PWM Dimming: The LT3477IUF offers up to 3000:1 dimming ratio for LED applications, providing precise brightness control.

Applications:

• Power LED Driver
• Automotive and Avionic Lighting
• Battery-Powered Equipment
• Boost Converters

Protection Features:

• Soft-Start: Limits inrush current during startup.
• Open LED Protection: Prevents overvoltage by shutting down the converter if an open LED is detected.
• Short-Circuit Protection: Enhances safety by protecting the device in case of a short circuit condition.
• Thermal Shutdown: Ensures the device operates within safe temperature limits.

The LT3477IUF is available in a compact 16-lead QFN package, ensuring a minimal footprint on the PCB while providing powerful performance for sophisticated power conversion solutions. Its ability to drive up to six white LEDs from a single Li-Ion cell, along with its flexible and powerful feature set, makes it a top choice for designers looking for a high-efficiency, adjustable, and reliable step-up converter.