NXP to Drive Automotive LEDs With Automotive-Qualified Technology

Until now, automotive LEDs have used complex, expensive driver ICs designed for generic Solid State Lighting (SSL) applications that lack many of the critical functions needed for automotive applications. As automotive SSL becomes more prevalent in the car, Lighting Control Unit makers and LED vendors are in need of more robust, efficient solutions that enable OEMs to realize the full benefits of energy-efficient LEDs, which can reduce fuel and battery consumption by approximately 50 percent in some applications compared to incandescent lights (UMTRI, 2008). By integrating the core functions critical to automotive LED lights, the ASL1010NTK/ASL1010PHN driver ICs offer a compact all-in-one solution that requires few additional components, enabling more cost-effective, elegant and reliable LED module designs. At the same time, the NXP system solution offers flexibility to cover different car platforms, configurations, output voltages, and numbers of LEDs.

“Demand for LED lighting in the car is growing rapidly, as carmakers seek to reduce energy consumption and take advantage of the longevity, styling, faster turn-on times and color options offered by automotive LEDs. Regulators are also helping to drive demand – for example, in Europe, exterior daytime running lights will become mandatory on all new cars starting in 2011, and car makers are taking the opportunity to introduce LED-based daytime running lights,” said Prem Sharma, marketing and business development manager for automotive SSL driver ICs, NXP Semiconductors. “NXP’s strong heritage in automotive-qualified technology, our expertise in energy-efficient lighting solutions, and our customer-focused methodology has enabled us to create a compact, cost-effective solution optimized for automotive LEDs.”

Robust turnkey solution offers flexibility across platforms

NXP provides a highly reliable, flexible system solution that can be used across different car platforms. The NXP LED driver IC features an auto buck/boost topology, allowing it to safely drive up to 20 LEDs from the standard car battery voltage; the system allows maximum flexibility on output voltage from 6 to 60V and can be used with any LEDs available on the market today.


The core functionality for driving automotive LEDs has been integrated into the IC, making the reference design compact yet flexible enough to be used across different configurations and numbers of LEDs, without requiring a redesign of the PCB. The integrated design eliminates redundant functionality across platforms, as well as the need for an external microcontroller. Further, the ASL1010NTK/ASL1010PHN driver ICs are based on the ABCD9 technology node – NXP’s automotive technology platform driving analog mixed-signal integration. Thus, the architecture of the ASL1010NTK is designed to reduce system costs as well as development time for Lighting Control Unit and LED designers, and help speed time to market.

Other key features in the NXP automotive LED driver ICs include:

* Temperature feedback to enable control of the temperature and performance of the LED
* Fault detection to enable feedback in the event of an LED fault
* Short circuit protection of the LEDs
* Elimination of the LED ripple current without external components
* External current selection and PWM programming
* Internal PWM generation for dimming LEDs, allowing the same LED to be used for daytime running lights and parking lights
* Under-voltage and over-voltage protection of the LEDs
* Small package outline