AL8866QFN-7

Overview

The AL8866QFN-7 is a high-voltage LED driver IC from Diodes Incorporated, designed for automotive and industrial lighting. It supports Buck, Boost, Buck-Boost, and SEPIC topologies with an input voltage range of 4.7V to 85V. Operating at a fixed frequency between 360kHz and 440kHz, it delivers up to 85V output. The device features analog and PWM dimming capabilities, overcurrent protection, and operates within a temperature range of -40°C to +125°C. Packaged in a U-DFN3030-10 format, it integrates internal switching for compact designs.

Feature Summary

• Supports multiple converter topologies including Buck, Boost, Buck-Boost, and SEPIC for flexible LED drive configurations.
• Enables precise brightness control through combined analog and PWM dimming interfaces.
• Incorporates comprehensive protection mechanisms such as cycle-by-cycle overcurrent limiting and thermal shutdown.
• Utilizes spread spectrum modulation to enhance electromagnetic interference performance.

Applications

• Automotive Daytime Running Lights (DRL)
• Headlamp systems including low and high beam applications
• Fog lamps and turn signal indicators
• Brake and parking light circuits

Procurement Notes

Verify the specific suffix 'FN' corresponds to the U-DFN3030-10 package variant when sourcing. Confirm RoHS compliance status directly with the manufacturer or authorized distributors prior to finalizing orders. Ensure that the intended application environment falls within the specified operating temperature range of -40°C to +125°C. Cross-reference the datasheet revision history to guarantee compatibility with existing design specifications and regulatory requirements.

Selection Notes

Select this component for designs requiring wide input voltage tolerance across 12V, 24V, and 48V systems. The integrated switch reduces external component count compared to discrete solutions. Consider the U-DFN3030-10 package for space-constrained PCB layouts. Evaluate thermal management needs given the high-power density potential. Verify that the required dimming resolution aligns with the device's specified accuracy and dynamic range capabilities.

Part Context

This part belongs to the AL8866 family of LED controllers manufactured by Diodes Incorporated. It serves as the automotive-grade version packaged in U-DFN3030-10, distinct from the SO-8EP variant (AL8866SP-13). The series targets high-reliability lighting applications requiring robust fault protection and standardized component usage across different vehicle architectures.

Replacement Considerations

The AL8866SP-13 offers identical electrical functionality but utilizes an SO-8EP package instead of U-DFN3030-10. Designers must account for footprint differences during substitution. No other direct pin-to-pin replacements are documented in public sources for this specific package configuration.