LT3477IUF#PBF

LED Driver IC Overview

The LT3477IUF#PBF is a current mode DC/DC step-up converter manufactured by Analog Devices Inc. It features an internal 3A, 42V switch and dual rail-to-rail current sense amplifiers. The device operates with an input voltage range of 2.3 V to 25 V and supports switching frequencies from 200 kHz to 3.5 MHz. It provides a maximum output voltage of 42 V and an output current capability of 2.66 A. The component utilizes a QFN-20 package and functions within a temperature range of -40°C to +125°C. It integrates traditional voltage feedback loops with unique current feedback loops for constant-current and constant-voltage operation.

LED Driver IC Feature Summary

• Integrates dual rail-to-rail current sense amplifiers for precise control
• Combines voltage feedback with two current feedback loops for CC/CV operation
• Features an internal high-voltage switch capable of handling up to 42V

LED Driver IC Applications

• LED drivers requiring open LED protection
• Boost converters with PWM dimming capabilities
• Backlight distributed power systems

LED Driver IC Procurement Notes

Verify availability status as the part may be subject to limited supply or factory special orders. Confirm RoHS compliance details through official documentation before procurement. Ensure the QFN-20 package matches your PCB footprint requirements. Validate that the operating temperature range meets your specific environmental conditions. Cross-reference the manufacturer number LT3477IUF#PBF with authorized distributors to ensure authenticity.

LED Driver IC Selection Notes

Select this component when designing circuits requiring a 3A boost converter with integrated high-side sensing. The dual current sense amplifiers make it suitable for applications needing accurate input current limiting. Consider the wide switching frequency range for optimizing inductor size and efficiency. Ensure the input voltage range of 2.3 V to 25 V aligns with your power source. The QFN-20 package requires appropriate thermal management for sustained high-current operation.

LED Driver IC Part Context

The LT3477 belongs to the LT3477 series of micropower boost converters. It is categorized under Switching Voltage Regulators and PMIC components. The IUF suffix indicates the industrial temperature grade and QFN-20 package variant. This part is distinct from other LT3477 variants which may differ in package type or temperature rating.

LED Driver IC Replacement Considerations

Check for exact pin-compatible substitutes if available. Verify that any replacement maintains the 3A switch current and 42V voltage ratings. Ensure the alternative supports the required switching frequency range and dual current sense functionality.