➀ The AL8866Q is an AEC-Q100 (Grade 1) qualified DC-DC converter controller for automotive front lights like headlights. It can implement buck, boost, buck-boost, or SEPIC topologies and operates from 4.7 to 85V. ➁ It offers analog and PWM dimming with a 100:1 range and ±12% output current accuracy at 20% dimming. ➂ It features soft-start, open-drain output for fault indication, and cycle-by-cycle current protection.

1. The SEPIC reference design by Onsemi simplifies automotive rear lighting design, ensuring stable voltage regulation and robust performance across input voltages. 2. This design utilizes the NCV887103 controller, offering features like peak current mode control and wide input voltage range. 3. The design includes a comprehensive BOM, schematics, and PCB layout, tested and available on Onsemi's website.