WPG World Peace Group launches automotive intelligent matrix headlight solution

WPG Holdings, a leading international semiconductor component distributor focusing on the Asia-Pacific market , announced that its subsidiary WPI has launched an automotive smart matrix headlight solution based on ONSEMI NCV78343, NCV78964, and NCV70517 products, supplemented by NXP , Nexperia, ams OSRAM, Molex and other chips as peripheral devices.

Figure 1- A display board of WPG World Peace’s automotive intelligent matrix headlight solution using products from Onsemi and other manufacturers

With the continuous development of automobiles, headlights are also evolving. Especially driven by the wave of intelligence , automobile manufacturers pay more attention to meeting the personalized needs of consumers, so car headlights are placed with higher expectations. They are not only key components to improve road lighting and driving safety, but also an important window to show the integration of automotive technology and aesthetics. In this context, WPG launched an automotive intelligent matrix headlight solution with Onsemi pixel driver controller NCV78343, LED driver NCV78964, motor driver NCV70517 as main components, NBA3N206S M− LVDS PHY, NXP S32K344 main control board, Nexperia dual-channel inverter 74LVC2G04, Molex connector , and ams OSRAM KW CELNM3.TK LED, KW DMLN33.SG LED. This solution is suitable for adaptive high beam matrix/pixel light groups, which can provide drivers with clear and safe vision while reducing interference to other road users.

Figure 2- A display board of WPG World Peace’s automotive intelligent matrix headlight solution using products from Onsemi and other manufacturers

This automotive matrix headlight solution consists of the S32K344 MCU main control board, NCV78964 LED driver module, NCV78343 LED light board, NCV70517 headlight steering stepper motor control board and MCU adapter control board.

The S32K344 MCU main control board is the core of the entire headlight control. It is equipped with the NXP S32K3 MCU widely used in the body domain and the FS26 power safety chip to meet the functional safety requirements of various levels. In addition, the main control board can be flexibly replaced according to the needs of end customers, further improving the applicability of the solution.

In terms of headlight driving, the solution uses NCV78964, a new generation of Boost-Buck headlight LED driver from Onsemi, which can provide two Buck outputs up to 60V/1.6A, supporting LED light string driving and PWM dimming functions. Among them, Boost, as a stable voltage source , can guarantee the voltage drop requirement of multiple LED light strings, while Buck, as a stable current source , can directly drive the LED to emit light. Since the current source is not affected by load voltage transients, the product can achieve fast switching , and has excellent performance in the adaptive high beam matrix/pixel light group.

The LED control board uses Onsemi pixel driver controller NCV78343, which is designed for automotive dynamic lighting applications and has open circuit, short circuit and overvoltage diagnostic protection functions. Each NCV78343 can realize independent on and off and PWM dimming control of 1-12 lamp beads, and multiple NCV78343 can be combined to realize independent control of more lamp beads.

The headlight steering stepper motor control board is controlled by Onsemi NCV70517, which is connected to the external microcontroller through I/O pins and SPI interface . It uses a proprietary PWM algorithm for reliable current control, meets automotive voltage requirements, and has safety monitoring functions. If electrical errors, undervoltage or increased junction temperature are detected, the chip will issue a warning.

In terms of the selection of car lights, the two products used in this solution, ams OSRAM KW CELNM3.TK LED and KW DMLN33.SG LED, are ideal choices for car headlight design.

Figure 3- Block diagram of WPG's automotive intelligent matrix headlight solution using products from Onsemi and other manufacturers

In addition, the solution is also equipped with a transfer control board. The MCU control signal and the communication signal are connected to the on-board chip, LED driver module board and light board through this board, thereby realizing the matrix headlight function. The interface of the transfer control board is a standard Arduino UNO interface, which can be connected to various types of MCU development boards on the market .

Thanks to its outstanding product performance and solution design, WPG can shorten the time it takes for automakers to design headlight systems and improve their market competitiveness. In the future, the company will work with more original equipment manufacturers to help automotive lighting technology develop in a more personalized and intelligent direction.

Core technology advantages:

NCV78343 can realize independent on/off and PWM dimming control of 1-12 lamp beads, and has open circuit, short circuit and overvoltage diagnosis protection;

NCV78964 adopts dual-phase Boost-Buck architecture and has PWM dimming function;

The interface of the MCU transfer control board is a standard Arduino UNO interface, which can be connected to various types of MCU development boards on the market;

Onsemi NCV70517 is used to drive the bipolar stepper motor to realize the headlight steering function.

Program Specifications:

software :

S32K344 headlight application demonstration software;

NCV78964 and NCV78763 drivers ;

NCV78343 driver;

NCV70517 driver.

Technical support: WPI matrix headlight platform user manual, training documents, software development manual;

Development environment requirements:

IDE: NXP S32DS 3.4.3 or S32DS 3.5.12;

NXP S32K3 RTD 2.0.0;

Debugger: PEMICRO multilink universal, Segger J-link or WPI LPCLink.