12 switch high brightness LED matrix manager to upgrade lighting
Time:2022-11-04
Views:1536
For automobile manufacturers, lighting is an increasingly important element of differentiated design. Headlamps, which are directly related to the "appearance" and active safety of automobiles, are the most important. In recent years, the headlights have also developed from halogen lamps to xenon headlights, and then to LED headlights and matrix LED headlights. Especially with the widespread popularity of LED light source lamps, the overall lighting effect of the vehicle has been significantly improved. The matrix LED lamps that were once only equipped on top luxury cars have gradually entered the ordinary household models.
Matrix LED replaces traditional automobile headlights to realize intelligent lighting
The friends who have driven overnight may have been shaken by the high beam to suspect their lives. The appearance of matrix LED headlights avoids this situation from the vehicle design. The matrix LED headlamp has several independent LED light emitting elements, which support independent switching and brightness adjustment. When meeting a car or meeting a pedestrian, the lamp will automatically decide which part of the lamp body to turn off according to the sensor information, so as to avoid the dazzle of the other party and significantly improve the active safety factor. In addition, the design of matrix LED headlights also provides conditions for intelligent functions such as servo steering and running water headlights, which can accurately illuminate the road ahead in coordination with other intelligent systems and achieve accurate control of the lighting area.
The so-called matrix LED headlight is the matrix partition management of LED light source. The driving computer controls the brightness, on/off, etc. of each matrix LED light source. Compared with ordinary LED lamps, matrix LED lamps can control the light source as fine as a specified lamp bead, while ordinary LED headlights can only control the whole group of LED lamp beads, which is much less functional and expandable than matrix LED headlights.
12 switch high brightness LED matrix manager to upgrade lighting
Simplified design and flexible control
A common challenge in LED headlight design is that matrix lighting and animation lighting require additional components, with complex software and lack of flexibility. The MAX25608 is a 12 switch matrix manager IC introduced by ADI for automotive lighting applications. It has a LED current of up to 1.6A, flexible configuration, programmable 12 bit PWM dimming function, and can meet various flexible lighting scene settings. The scalable configuration allows multiple devices to be connected in daisy chain mode.
The MAX25608 is internally integrated with 12 switch arrays. It uses 12 independently controlled n-channel MOSFET switches. The rated voltage is 14V and the on resistance is 0.06 Ω. A single current source can be used to supply power to all series connected LED, and each LED can be dimmed by turning on and off the bypass switch on each LED. These devices can also be configured in dual string LED applications, with six switches in series in each string, and each switch can be connected in series on one, two, or three LED. The MAX25608 also includes an internal charge pump to power the gate drive of the LED bypass switch.
Serial interface (UART) for flexible communication
MAX25608 supports multiple serial interfaces (UART) for serial communication, and can be used in full duplex applications or half duplex applications, such as CAN transceivers, and supports addressing of up to 16 devices. Each switch can be fully opened, closed or dimmed via the serial interface.
Higher reliability, stronger EMC features
As a vehicle solution, reliability is particularly important. The MAX25608 has passed AEC-Q100 certification. At the same time, several key features further improve reliability, including not only lower EMI by turning on the internal charge pump clock oscillator, but also programmable slew rate control, which is used to reduce electromagnetic interference NTC temperature monitoring. The MAX25608 also provides LED open circuit protection function. Open circuit and short circuit detection can be performed on each switch, and open circuit and short circuit LED faults can be reported through the serial interface.
MAX25608 can be used for matrix lighting, adaptive driving, beam and animation lighting
Flexible management of animation lighting makes the car unique
MAX25608 can be used for matrix lighting, adaptive driving, beam and animation lighting. Nowadays, more and more cars adopt animated lighting, which makes new cars unique and shows their individual characteristics. The dazzling lighting effect of animation lighting is quite complex, and more LEDs need to be used, and each LED needs to be controlled separately. MAX25608 provides a convenient solution for automobile LED matrix animation lighting management
Flexible, efficient, reliable, artistic
The trend of modern automobile lighting design with multi-dimensional development
The market research of authoritative institutions shows that safety and brand effect are the two main factors to improve the acceptance of LED in automobile lamp platform. As part of their unique brand identity, OEM manufacturers are introducing advanced safety management and other technologies for LED and matrix lighting design, such as non glare high beam lamps. Nowadays, cars are getting bigger and bigger, their functions are getting more and more advanced, and their driving speed is getting faster and faster. Therefore, it is necessary to adopt more fashionable, elegant, clean, safe and reliable LED lighting schemes, so as to achieve a reaction speed of 10 times that of traditional lighting while reducing CO2 emissions, and ensure a 10000 hour service life.
With the increasingly clear trend of automobile electrification and intelligence, lighting has become an increasingly important feature in today‘s and future automobile design. LED lighting is characterized by flexibility, efficiency, reliability, and more personalized and artistic effects. It is used in cars in many different ways, such as high beam headlights and low beam headlights, daytime running lights, indicator lights, brake lights, instrument panel displays, and other types of increasing interior and exterior lighting. In these designs, accurate, efficient and reliable LED manager of LED matrix is required.
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