AL8861Y-13

Overview

The AL8861Y-13 is a single-output DC-DC buck converter LED driver IC manufactured by Diodes Incorporated. It integrates an internal power switch and supports input supply voltages from 4.5V to 40V, delivering up to 1.5A output current with a maximum output voltage of 36V. The device operates at a switching frequency of 1MHz and features both analog and PWM dimming capabilities. Designed for surface-mount installation in SOT-89-5 packages, it functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates an internal high-voltage power switch for compact circuit design
• Supports dual dimming methods including analog control and pulse-width modulation
• Operates as a step-down (buck) regulator topology for efficient LED current regulation

Applications

• LED backlighting systems
• General solid-state lighting fixtures
• Commercial signage displays

Procurement Notes

Verify the specific suffix against official Diodes Incorporated documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required operating temperatures and input voltage ranges before integration. Cross-reference datasheet revisions to confirm pinout consistency and electrical characteristics match system requirements.

Selection Notes

Select this component when a compact buck topology is required for driving LEDs from higher voltage rails. The integrated switch eliminates external MOSFETs, reducing board space. Verify that the 1.5A current limit meets load demands and that the 1MHz frequency allows for appropriate passive component sizing without excessive electromagnetic interference.

Part Context

This part belongs to the AL8861 series of LED lighting drivers. It is designed for medium-voltage applications requiring constant current regulation. The series typically includes variants with different packaging or thermal ratings, all sharing the core buck converter architecture and dimming functionality defined in the primary datasheet.

Replacement Considerations

Check for direct substitutes within the AL8861 family or equivalent buck LED drivers from other manufacturers. Ensure replacement parts match the SOT-89-5 footprint and maintain similar electrical parameters such as input voltage range and output current capacity.