LT8391IFE

LED Driver IC Overview

The LT8391IFE is a synchronous four-switch buck-boost LED controller designed for high-efficiency lighting applications. It supports an input voltage range of 4V to 60V and delivers up to 2A output current with a maximum output voltage of 25V. The device operates at a switching frequency of 650kHz and features spread spectrum modulation to reduce electromagnetic interference. Packaged in a 28-TSSOP-EP, it integrates analog and PWM dimming capabilities for precise light control.

LED Driver IC Feature Summary

• Synchronous four-switch buck-boost topology regulates LED current regardless of input-to-output voltage relationships
• Integrated spread spectrum modulation minimizes radiated noise and EMI
• Supports both analog and pulse-width modulation (PWM) dimming methods

LED Driver IC Applications

• General LED lighting systems
• Display backlight drivers
• Indicator lighting circuits

LED Driver IC Procurement Notes

Verify the specific suffix (e.g., #PBF or #TRPBF) against your bill of materials to ensure correct packaging format. Confirm that the 28-TSSOP-EP package matches your PCB footprint requirements. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and revision status before procurement.

LED Driver IC Selection Notes

Select this component when input voltage varies significantly relative to the LED string voltage, requiring buck-boost operation. Ensure the design accommodates the 650kHz switching frequency and thermal requirements of the exposed pad package. Verify compatibility with required dimming signals and operating temperature ranges specified in the datasheet.

LED Driver IC Part Context

This IC belongs to the LT8391 family of LED controllers from Analog Devices. It serves as the active regulation component in non-isolated LED driver circuits. The device is distinct from evaluation boards like the DC2345A, which are used for testing rather than end-product integration.

LED Driver IC Replacement Considerations

Consult official Analog Devices documentation for verified substitute part numbers. Do not assume functional equivalence with other LED drivers without verifying pinout, electrical parameters, and control interface compatibility.