On April 16, 2024, Da Lian Da Holdings, an international leading semiconductor component distributor dedicated to the Asia Pacific market, announced that its subsidiary, Shiping, has launched a car headlight solution based on Ansemi's NCV78702, NCV78723, NCV70517 chips, NXP's S32K144 MCU, and AMS OSRAM's KW H2L531.TE and KW CENM2-TK LED products.

In recent years, with the continuous upgrading of consumer requirements for the appearance and performance of cars, the design and innovation of car headlights have also ushered in broad development prospects. As an indispensable component of vehicles, the performance of the headlight system is not only directly related to nighttime driving safety, but also an important indicator of the vehicle's design level and quality. Based on the onsemi NCV78702 BOOST chip, NCV78723 Buck chip, NCV70517 motor drive chip, NXP S32K144 MCU, and AMS OSRAM KW H2L531.TE, KW CELNM2-TK LED products, the automotive headlight solution developed by Da Lian Da Shi Ping can ensure the high efficiency and reliability of the lighting system, and improve the safety of drivers driving at night.

The car headlight scheme consists of four parts: LED driver board, MCU board, Motor board, and LED board. Among them, the LED driver board is centered around Ansemy's NCV78702 and NCV78723. NCV78702 is an efficient BOOST chip used for LED drivers, designed specifically for high current LEDs and capable of outputting voltage through SPI configuration. NCV78723 is an efficient Buck dual LED driver with two independent current regulators built-in, used for diagnostic functions required for LED string and car headlights. The chip does not require any external detection resistance to adjust the voltage drop current. And the output current can be customized through SPI. By combining NCV78702 with NCV78723, it can drive multiple LED strings up to 60V.

In the MCU board section, the solution takes NXP S32K144 MCU as the core, based on the Echoes board design of Shiping Group, and controls the LED driver board through SPI communication. S32K144 MCU equipped with ARM? Cortex? The M0+/M4F kernel supports a maximum of 256KB RAM and 2MB Flash, with a maximum operating frequency of 112MHz, providing strong support for real-time control and data processing.

In the Motor board section, with Ansemy's NCV70517 as the core, NCV70517 is a micro stepper motor driver. The chip is connected to an external microcontroller through I/O pins and SPI interfaces. NCV70517 uses a proprietary PWM algorithm for reliable current control, meeting automotive voltage requirements, and has safety monitoring functions. If electrical errors, undervoltage, or junction temperature rise are detected, the chip will issue a warning.

The design of the LED board adopts AMS OSRAM KW H2L531.TE and KW CELNM2-TK LEDs, which meet the requirements of vehicle applications.

In the process of continuous innovation in automotive technology, this car headlight solution can provide drivers with higher safety guarantees and driving comfort. In the future, the United Nations General Assembly will continue to promote the advancement of automotive lighting technology and contribute more to the prosperity and development of the automotive industry.

Core technological advantages:

The Headlamp LED group is designed with integrated far and near lighting, which can be controlled separately;

The DRL/CL lamp bead group includes daytime running lights and corner lights, which can be controlled separately;

Combined with a stepper motor, it can change the direction of the car's headlights and provide high-quality road lighting;

Low EMC interference;

The software is completely independently developed and will be ported to other platforms in the future. At present, our main agents for automotive chip production lines include NXP, onsemi, Flagchip, SemiDrive, etc.

Scheme specifications:

The system power supply voltage is 12V, and the input voltage range is 5V~30V;

The typical working voltage of the Headlamp lamp bead group is 60V;

The typical working voltage of DRL/CL lamp bead group is 24V;

The output voltage range is 6V~67V;

MCU: Arm? Cortex? M0+/M4F core;

Support overvoltage and overcurrent protection;

Equipped with FSO mode;

Equipped with LED indicator lights and buttons;

Development board dimensions: LED driver board 110mm x 70mm, Motor board 55mm x 38mm, LED board 42.6mm x 18.71mm, MCU board 55mm x 98mm.

About The Author

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry. They are committed to providing customers around the world with the most necessary, outdated, licensed, and hard-to-find parts.

Media Relations

Name: John Chen

Email: salesdept@topcomponents.ru