LT8391AHUFD#TRPBF

LED Driver IC Overview

The LT8391AHUFD#TRPBF is a synchronous four-switch buck-boost LED controller designed for high-performance lighting applications. It supports an input voltage range of 4V to 60V and can drive outputs up to 60V. The device regulates LED current using a proprietary peak buck-peak boost current mode control scheme, allowing operation when the input voltage is above, below, or equal to the output voltage. It features a switching frequency range of 600kHz to 2MHz and includes analog and PWM dimming capabilities.

LED Driver IC Feature Summary

• Synchronous four-switch buck-boost topology enables regulation across varying input and output voltage conditions
• Proprietary peak buck-peak boost current mode control ensures precise LED current regulation
• Supports both analog and PWM dimming methods for flexible brightness control

LED Driver IC Applications

• Automotive exterior lighting systems requiring wide input voltage ranges
• Industrial LED lighting fixtures with variable supply voltages
• High-power LED drivers where input may fluctuate around output levels

LED Driver IC Procurement Notes

Verify the specific suffix HUFD corresponds to the required package and tape-and-reel configuration. Confirm that the LT8391A variant matches the design requirements regarding switching frequency and control architecture. Ensure compatibility with existing PCB layout guidelines provided in the official datasheet for optimal thermal and electrical performance.

LED Driver IC Selection Notes

Select this component when the application demands regulation of LED current despite significant variations between input and output voltages. The four-switch topology is essential for maintaining efficiency when Vin approaches or crosses Vout. Consider the 600kHz to 2MHz frequency range for balancing EMI and passive component size.

LED Driver IC Part Context

This part belongs to the LT8391 family of LED controllers from Analog Devices. It is distinct from standard buck or boost converters by its ability to handle buck-boost transitions seamlessly. The HUFD package indicates a specific surface-mount footprint suitable for automated assembly processes.

LED Driver IC Replacement Considerations

LT8391AHUFD#PBF is the leaded version of the same functional device. Other LT8391 variants may differ in package type or temperature grade but share the core control logic.