Diodes Incorporated has expanded its automotive-compliant LED driver portfolio with the AL8866Q. This DC-switching LED driver-controller drives an external MOSFET and supports buck, boost, buck-boost and single-ended primary-inductance converter (SEPIC) topologies for high-power LED lighting systems. Applications include daytime running lights, high/low beams, fog lights, turn lights, brake/stop lights and more.
It operates from 4.7 to 85 V, covering the common 12, 24 and 48 V battery power rails. This flexibility and multi-mode operation enables lighting designers to standardize on a single component type, streamlining inventory and simplifying design processes.
The component has a fixed-frequency (400 kHz) peak current-mode control architecture. It incorporates a spread spectrum frequency modulation technique to enhance EMI performance, which is compliant with the most stringent CISPR 25 Class 5 standard.
An integrated soft-start function gradually increases the inductor and switch current to minimize potential overvoltage and overcurrent at the output.