Diodes Incorporated Releases Multi-Phase SPI Boost Controller for Automotive LED Lighting

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Diodes Incorporated Releases Multi-Phase SPI Boost Controller for Automotive LED Lighting

Diodes Incorporated has introduced the AL8853AQ, a highly integrated multi-phase boost controller designed specifically for high-power automotive LED lighting applications. The device supports up to four phases and uses SPI communication for flexible configuration and real-time monitoring, making it ideal for advanced matrix LED headlights, adaptive driving beam (ADB) systems, and high-brightness exterior lighting.

Diodes Incorporated AL8853AQ multi-phase boost controller — Diodes AL8853AQ multi-phase SPI boost controller for automotive LED lighting

Key Features and Performance

The AL8853AQ operates over a wide input voltage range of 4.5 V to 65 V and can deliver output voltages up to 100 V. It supports programmable switching frequencies from 50 kHz to 1 MHz, allowing designers to optimize efficiency and EMI performance.

Main advantages include:

Multi-phase operation (1 to 4 phases) for higher power and reduced current ripple
SPI interface for dynamic configuration, fault reporting, and real-time diagnostics
Built-in protection: over-voltage, over-current, over-temperature, and LED short/open detection
AEC-Q100 Grade 1 qualification and wide temperature range (-40°C to +150°C)
High current accuracy and excellent dimming performance

AL8853AQ block diagram and multi-phase architecture — Block diagram showing multi-phase boost topology and SPI control

Target Applications

The AL8853AQ is optimized for demanding automotive lighting systems, including:

Matrix and pixel LED headlights
Adaptive Driving Beam (ADB) systems
High-power daytime running lights (DRL)
Rear combination lamps with high-brightness LEDs
Advanced front lighting systems (AFS)

Thanks to its multi-phase architecture and SPI interface, the controller enables precise current regulation, improved thermal performance, and simplified system design while meeting strict automotive EMC and reliability requirements.

AL8853AQ in automotive matrix LED headlight application — Typical application: multi-phase boost driving matrix LED headlight

The AL8853AQ is available in a compact 4 mm × 4 mm QFN-24 package. It is already in production, with samples and evaluation boards available now.