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Diodes Corporation announced the launch of the AL8866Q LED driver, expanding its portfolio of automotive standard compliant products. This DC-switched LED driver controller drives external MOSFETs and supports step-down, step-down, step-down, and single-ended single-side inductor converter (SEPIC) topologies for high-power LED lighting systems. Product applications include DRL, fog lights, turn signals, brake/stop lights, etc.

The AL8866Q operates over a wide voltage range of 4.7V to 85V, covering the usual 12V, 24V and 48V battery rails. Flexible voltage selection and multi-mode work allow lighting designers to standardize on a single component type, streamlining inventory and simplifying the design process.

The AL8866Q has a fixed Frequency (400kHz) peak current mode control architecture, and uses Spectrum Frequency Modulation technology to improve EMI performance, complying with the most stringent CISPR 25 Class 5 standards.

The AL8866Q uses DIM pins, supports LED current analog dimming and PWM dimming, and has a 1% reference tolerance for better brightness control and improved matching between lamps. This driver has a greater than 100:1 analog dimming range and achieves ±12% output current accuracy at low analog dimming levels (20%), which is more accurate than comparable LED drivers. PWM dimming (0.1 to 1kHz) can achieve a 100:1 dynamic range.

The AL8866Q has a built-in soft start function that gently increases the inductor and switching current to minimize possible overvoltages and overcurrents at the output. This device has an open-leak fault output that can represent a variety of fault conditions, including LED output overvoltage, LED output open/short circuit, Cycle-by-Cycle overcurrent protection, sensing resistance and short-circuit inductor/diode detection, diode open circuit, and overheat shutdown.

The AL8866Q is available in SO-8EP and U-DFN3030-10 package options with an operating temperature range of -40°C to +125°C. AL8866QSP-13 (SO8-EP) and AL8866QFN-7 (U-DFN3030-10) are now available. A standard version of AL8866 is also available for industrial and commercial product applications.