How a multi-phase driver IC for headlamp light control unit design works - blog
Plenty of ink is given to global trends to make our lives greener, but hidden away is a little gem that I'd like to talk about today.
Our ASLxxxx series of LED drivers includes versatile, application-specific, constant-current, high-brightness LED (HB-LED) driver ICs. They provide a fully integrated solution for automotive LED lighting applications—maintaining system flexibility, enabling design re-use, and providing significant scalability in a low-cost solution. They combine our deep understanding of LED performance with our world-class automotive A-BCD mixed signal HV technology.
Our driver IC portfolio is designed to enable maximum design freedom with minimum cost in the initial design, mass production and future system updates. The portfolio consists of two families - the multiphase boost ASLx500 and multichannel buck ASLx416 driver ICs. Together, they provide a single platform architecture that has the capability to drive any configuration of LEDs and channels, while keeping system cost down.
The high level of digital integration ensures a low external component count for maximum robustness and ease of design. Furthermore, the multi-channel buck ICs uses an external power MOSFET for each channel. This enables the optimal thermal performance of the drivers under high current situations (>1.5A per channel). Therefore the multi-channel LED driver ICs can achieve high output powers with minimum PCB area and without expensive thermal components.
The multi-channel LED driver ICs are highly scalable and flexible. With one boost IC, our solutions can be scaled from 2 channels to 12 channels with output powers between 30 W to 140 W. Furthermore, via the SPI interface, the driver ICs are highly programmable, which empowers our solutions to be capable of driving all kinds of advanced lighting applications, e.g. adaptive driving beam (ADB), advanced front lighting (AFL), laser, etc. Together with the optimized, architecture, package, and pinning, our solution reduces the R&D throughput time for both new product developments and future product upgrades.
All our multi-channel automotive LED drivers are housed in a very small HVQFVN32 pin package. They are specially designed to support the growing replacement of traditional automotive lighting solutions with high-brightness (HB) and intelligent LED solutions. The devices are fully automotive qualified, compliant with AEC-Q100 grade 1, with an ambient temperature operating a range of –40 to +125°C. The devices also deliver low electromagnetic emission (EME) and high electromagnetic immunity (EMI).
|ASL1500SHN||Single-Phase Automotive LED Boost Driver|
|ASL2416SHN||Two-channel Automotive LED Buck Driver|
|ASL2500SHN||Two-Phase Automotive LED Boost Driver|
|ASL3416SHN||Three-channel Automotive LED Buck Driver|
|ASL4500SHN||Four-Phase Automotive LED Boost Driver|