Diodes AL8853AQ: Advanced Automotive LED Controller

On September 26, 2023, Diodes Incorporated proudly unveiled its latest innovation, the AL8853AQ boost/single-ended primary-inductor converter (SEPIC) controller. This cutting-edge controller is tailored for a wide spectrum of applications within the automotive industry, specifically targeting LED products.

The AL8853AQ represents the pinnacle of automotive technology, meeting rigorous industry specifications while simultaneously streamlining the bill of materials (BOM) for automotive LED applications. These applications span a gamut that includes exterior lighting, headlights, Head-Up Displays (HUDs), and backlight displays, all while delivering exceptional performance.

One of the standout features of the AL8853AQ is its compatibility with the SEPIC topology. This empowers automotive headlight manufacturers to directly drive high beam or low beam LED arrays, drawing power directly from the vehicle's battery. This eliminates the need for the traditional two-stage topology, which consists of a boost converter followed by a buck converter, or the full-bridge buck-boost topology. By embracing the AL8853AQ's SEPIC functionality, manufacturers can enjoy cost-effectiveness and simplicity, which aligns perfectly with the growing prevalence of Head-Up Display systems in modern automotive design.

The controller's versatility is further underscored by its wide input voltage range, spanning from 6V to 40V, accommodating the typical 12V vehicle battery input. With a 200mV feedback reference voltage boasting a ±3% tolerance, the AL8853AQ strikes a harmonious balance between efficiency and precise brightness control. Moreover, its fixed 400kHz switching frequency operates beyond the mid-wave (MW) frequency range, effectively mitigating electromagnetic interference (EMI). To combat any flickering issues associated with PWM dimming, the controller employs a rapid (50kHz) pulse-width modulation (PWM) to analog dimming mode (ranging from 100% down to 1%).

Reliability is paramount, and the AL8853AQ excels in this aspect as well. Robust protection features are integrated to safeguard against unforeseen events, such as overvoltage, overcurrent, over-temperature, diode, and inductor short-circuit conditions.

For those seeking peace of mind regarding quality and compliance, the AL8853AQ adheres to the stringent AEC-Q100 Grade 1 specifications. It is meticulously crafted in facilities that hold certification to the IATF 16949 standard and undergoes PPAP testing to ensure consistent excellence.

The AL8853AQ is available in an SO-8 package, making it an enticing proposition for professionals and businesses operating within the automotive industry. Embrace the future of automotive LED applications with Diodes Incorporated's AL8853AQ controller.