AL8871Q 60 V Buck-Boost Controller with Thermal Foldback and Fault Detection

Diodes' AL8871Q is an LED driver/controller IC for driving external MOSFETs to drive high-current LEDs. Its 60 V capability enables it to withstand load-dump conditions. Meanwhile, the buck-boost topology enables it to efficiently control the current through series-connected LEDs across the whole battery voltage range. Its modified hysteretic control scheme provides high output-current accuracy using only one current sense resistor. High-accuracy dimming is achieved through DC control and high-frequency PWM control. The AL8871Q uses two pins for fault diagnosis. A fault flag output highlights a fault, while the multi-level status pin gives further information on the exact fault. AL8871Q is automotive-compliant, qualified to AEC-Q100 Grade 1, is PPAP capable, and is manufactured in IATF16949:2016 certified facilities.