AL8866QSP-13

Overview

The AL8866QSP-13 is a high-voltage internal switch 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 4.7 V to 85 V. Operating at a fixed frequency of 400 kHz, it features peak current mode control with spread spectrum modulation for EMI compliance. The device offers PWM dimming support and includes comprehensive protection mechanisms such as overvoltage, overcurrent, and thermal shutdown. It is housed in an SO-8EP package.

Feature Summary

• Supports multiple converter topologies including Buck, Boost, Buck-Boost, and SEPIC for flexible LED drive configurations
• Integrates spread spectrum modulation to enhance electromagnetic interference performance
• Provides precise analog and PWM dimming capabilities with low reference tolerance
• Includes built-in soft start and extensive fault detection for system reliability

Applications

• Automotive Daytime Running Lights (DRL)
• Headlamp systems (High/Low beam)
• Fog lamps and turn signals
• Brake and parking lights

Procurement Notes

Verify the specific suffix 'SP-13' corresponds to the SO-8EP package and tape-and-reel quantity when ordering. Confirm that the AEC-Q100 Grade 3 qualification meets your automotive application requirements. Ensure compatibility with the intended PCB footprint for the exposed pad thermal design. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions or pin assignments before finalizing procurement.

Selection Notes

Select this component for applications requiring a wide input voltage range up to 85 V and integrated switching capability. It is suitable for designs needing simplified inventory through topology flexibility. Consider the SO-8EP package for its thermal performance and space efficiency. Evaluate the need for spread spectrum modulation if strict CISPR 25 Class 5 compliance is required. Ensure the design can accommodate the 400 kHz switching frequency constraints.

Part Context

This part belongs to the AL8866Q family of LED drivers from Diodes Incorporated. It is specifically the SO-8EP packaged variant with a tape-and-reel shipping configuration. The Q-series indicates automotive-grade qualification under AEC-Q100 standards. It complements other variants like the U-DFN3030-10 package version for different form factor requirements.

Replacement Considerations

Check for direct substitutes within the AL8866Q series, such as AL8866QFN-7, which shares similar electrical characteristics but uses a U-DFN3030-10 package. Verify pinout compatibility and thermal dissipation requirements when considering alternative packages. Non-automotive versions like the standard AL8866 may lack AEC-Q100 certification.