Diodes Incorporated has introduced a new automotive-qualified boost controller designed to meet rising demand for brighter, larger, and more power-efficient displays inside vehicles. The AL3069Q, announced Thursday, is a high-efficiency 60-volt device featuring four precision current sink channels and an expanded suite of diagnostic tools aimed at improving reliability across automotive backlighting systems.
The controller targets a growing range of in-vehicle applications—including infotainment units, instrument clusters, and heads-up displays—as carmakers continue integrating bigger LED panels and higher-resolution interfaces. With support for display sizes up to 32 inches, the AL3069Q extends Diodes’ portfolio of automotive display-driving components.
Operating across an input voltage window from 4.5 to 60 volts, the AL3069Q is engineered to work across common automotive power rails, including 12-volt, 24-volt, and emerging 48-volt architectures. The device uses adaptive boost voltage control and offers an adjustable switching frequency between 100 kHz and 1 MHz, giving system designers flexibility to navigate efficiency targets, electromagnetic performance, and PCB size constraints.
A key feature of the controller is its four integrated 80-volt LED current sink channels, each capable of supplying 250 milliamps continuously and up to 400 milliamps in pulsed mode. Current matching of ±0.5% is designed to ensure uniform brightness across LED strings—an increasingly important metric for larger displays. The device also supports PWM-to-analog dimming, reaching duty cycles as low as 1/5000 at 100 Hz to enhance low-light performance and reduce color shift.
Diodes has included a broad set of safety and diagnostic functions intended to meet automotive robustness requirements. Protections span cycle-by-cycle current limiting, undervoltage lockout, programmable overvoltage protection, overtemperature shutdown, and multiple LED-string fault detections covering open, short, diode-short, diode-open, and inductor-related failures. A dedicated FAULTB pin allows the system to flag issues in real time.
The AL3069Q will be offered in TSSOP-16EP and U-QFN4040-16/SWP packages, supporting compact layouts in space-constrained automotive modules. Pricing starts at $0.54 for 1,000-unit quantities. Diodes also released a non-automotive variant, the AL3069, for industrial and commercial use.
