LT8391EUFD#PBF

LED Driver IC Overview

The LT8391EUFD#PBF is a synchronous 4-switch buck-boost LED controller designed for high-performance lighting applications. It regulates LED current regardless of whether the input voltage is above, below, or equal to the output voltage. The device supports an input voltage range of 4 V to 60 V and delivers up to 1.5 A of output current. Operating frequencies are adjustable from 600 kHz to 2 MHz. It features PWM dimming capabilities and open LED protection. The component is housed in a QFN-28 package and operates within a temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Synchronous 4-switch buck-boost topology enables regulation across varying input and output voltage conditions
• Integrated PWM dimming control for precise brightness adjustment
• Built-in open LED protection circuitry enhances system reliability
• Wide operating frequency range allows optimization of external component size

LED Driver IC Applications

• LED lighting drivers
• Display backlights
• Indicator lights

LED Driver IC Procurement Notes

Verify the specific suffix EUFD#PBF against the manufacturer's official datasheet to confirm pinout, thermal pad configuration, and RoHS compliance status. Ensure that the QFN-28 package dimensions match the PCB footprint requirements. Cross-reference the manufacturing date code with any relevant Product Change Notifications (PCN) issued by Analog Devices to guarantee material consistency and supply chain stability during production.

LED Driver IC Selection Notes

Select this component when the application requires a single-channel driver capable of handling wide input voltage variations relative to the LED string voltage. The choice is appropriate for designs prioritizing efficiency across diverse operating conditions without requiring complex transformer-based solutions. Consider the 28-QFN package for space-constrained layouts. Evaluate thermal performance at maximum load currents to ensure the junction temperature remains within specified limits under worst-case ambient conditions.

LED Driver IC Part Context

This part belongs to the LT8391A series of LED controllers from Analog Devices. It shares architectural similarities with the LT8390, which functions as a general-purpose switching regulator rather than a dedicated LED driver. The LT8391 family is distinct in its integrated LED-specific protections and dimming interfaces, differentiating it from standard DC/DC controllers while maintaining compatible form factors and electrical characteristics.

LED Driver IC Replacement Considerations

LT8391AEUFD#PBF is a verified variant within the same product family offering identical functional specifications and pin compatibility.