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DESIGNING COOLER RUNNING, MULTI-CHANNEL DYNAMIC AUTOMOTIVE LIGHTSAcross the automotive landscape, the push for electrification has yielded the incredible proliferation of exotic vehicles. Yesterday’s bulky, single-function lights are being replaced with newer, slender designs that wrap around a car’s front, back, or sides. The drive to go beyond traditional illumination or signaling means that tomorrow’s automotive lights will be challenged to display sophistic...
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AUTOMOTIVE-GRADE, 16-CHANNEL, CURRENT-SINK MATRIX LED DRIVER: MPQ7225The MPQ7225 family enables vivid and bright animations within automotive headlight or taillight designs. With lighting applications utilizing hundreds of LEDs for achieving brilliant resolution, the MPQ7225 allows up to 16 devices to be cascaded, for a total of 256 channels. Compact lighting elements for aesthetics yield smaller PCBs where heat management becomes critical. With functional safety b...
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MPS SOLUTIONS FOR INTELLIGENT DRIVINGThe four modern trends of the automotive industry are electrification, intelligence, networking, and sharing. Among these development trends, intelligence requires advanced on-board sensors, controllers, and actuators. Highly intelligent systems tend to have more sensors. As such, the number and variety of cameras/sensors installed on cars increase daily. These include the cameras installed on th...
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USING EXTERNAL KNOBS TO IMPROVE TRANSIENT PERFORMANCE OF BUCK REGULATORS WITH AN INTEGRATED COMPENSATION NETWORKThe high power density requirement and board-level space constraints in modern applications — such as lighting, ADAS, and USB — call for higher integration in buck regulators. There is a trend to integrate MOSFETs and compensation networks inside the chip. This integration of the compensation network’s passive components saves cost, board space, and design iterations. However, it...
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AUTOMOTIVE LED DRIVER DESIGN: GOOD PRACTICES TO ENSURE EMC COMPLIANCEMore and more automotive manufacturers are adopting LED lighting technology and moving away from halogen light bulbs. LED lighting systems have diverse power supply requirements, depending on the number of devices present on a string, the current needed, dimming, and other factors. A traditional linear regulator cannot always meet these needs. As a result, electronics engineers are increasingly re...
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TACKLING AUTOMOTIVE LIGHTING’S COMMON CHALLENGES WITH NEW LED DRIVER MODULESLED lighting is one of the fastest growing segments in automotive electronics, but it is not without its own unique challenges. This article describes several major constraints facing today’s lighting designers and explores how these can be addressed by MPS’s new MPM6010-AEC1 automotive LED module. One of the biggest trends in automotive electronics has been the widespread proliferati...
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ONBOARD CHARGING MODULE (OBCM)Electric vehicles (EVs) are becoming more present every day, with the adoption of EVs growing at an exponential rate. Onboard charging (OBC) is a very important part of EVs, since it determines the maximum possible charge rate while an AC charger is connected to the vehicle. The maximum charge capability for a fully electric vehicle is typically between 6.6kW and 22kW, and for a plug-in hybrid veh...
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DC FAST CHARGING STATIONDC fast charging stations are becoming more common with the increased adoption of electric vehicles. Charging stations are a vital part of the infrastructure along major highways and populated suburbs, ensuring that electric vehicles have a place to charge during long-distance travel and day-to-day driving. These systems are often comprised of multiple 25kW to 75kW modules to create fast charging ...
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FROM COLD CRANK TO LOAD DUMP: A PRIMER ON AUTOMOTIVE TRANSIENTSAdvances in automotive technology have dramatically increased the number of sophisticated electronic circuits required to improve driving experience and safety in a typical automotive system. New vehicles provide infotainment systems with high-resolution displays, an enhanced user interface, and numerous connectivity options. Improved safety features include LiDAR for collision avoidance, as well ...
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CONTROLLING EXCESSIVE CONDUCTED EMI UNDER A LONG-LINE LOAD (PART III)This article is the final part of a three-part series exploring methods for analyzing and improving excessive EMI under long-line loads. Part I discussed the common-mode (CM) EMI model and considered the influence of electric field coupling and magnetic field coupling. Part II validated the transmission line theory through a series of computations. Part III will focus on three methods that were im...
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USING THERMAL DERATING TO EXTEND AUTOMOTIVE LED LIFE EXPECTANCYAutomotive manufacturers are adopting more and more LED lightning technology due to its low power consumption and extended lifecycle. However, when the latest technology trends are paired with challenging automotive requirements, there is an increased demand to design solutions that can avoid thermal breakdown while lengthening the life expectancy of the LEDs. This article will present a simple, l...
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MPQ7200: 3A BUCK, 1.2A BUCK-BOOST LED DRIVER FOR AUTOMOTIVE LIGHTINGThe MPQ7200 is an automotive-grade LED driver features 3A buck mode and 1.2A buck-boost mode, and is capable of withstanding up to 42V load dump and junction temperatures up to 150°C. Ideal for use in high and low beams, daytime running lights, fog lights, and rear lights, the MPQ7200 comes in a tiny 3mmx4mm QFN package. Watch to learn how excellent EMI and thermal performance, plus integrated...
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LOW-POWER EXTERIOR AND INTERIOR LIGHTINGAs automotive LED drivers replace traditional bulbs, the operation of low-power exterior and interior lighting systems have become increasingly advanced. Exterior lighting includes turn signals, side markers, rear combination lamps (RCLs), and fog lamps. Interior lighting includes button backlighting, instrument clusters, and dome and ambient lights. While improved low-power operation of exterior ...
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ALL LED LIGHTINGAutomotive LED lighting systems are comprised of the headlights, interior lights, rear lights, small lights, LED pixel light controllers, and DC/DC LED drivers. With increasingly dynamic and accurate LED lighting features that integrate flexible control, animation, and energy efficiency, key functions including supply, control, sense, actuation, and communication are also becoming more complex. Th...
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DISPLAY (NAVIGATION, HEADS-UP, CLUSTER)Automotive displays — which include the center display, heads-up display (HUD), and gauge instrument cluster — show key information and interactive content to the driver. The center information display is connected to the head unit, and provides navigation and other in-cabin infotainment controls. The automotive HUD and gauge instrument cluster provide easy-to-access information for the driver. Th...
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LIDARLaser imaging, detection, and ranging (LiDAR) is a rapidly expanding market for automotive advanced driver assistance system (ADAS) applications. Autonomous vehicle perception sensing is a cutting-edge functionality of ADAS technologies, and will continue to develop as new cars integrate radar with cameras and LiDAR systems. LiDAR uses real-time measurements of light pulses to offer higher bandwid...
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INFOTAINMENT SYSTEMSAutomotive in-vehicle infotainment systems are becoming increasingly software-driven to enhance safety and security, as well as the overall driving experience. Modern cars integrate driving and environmental information, passenger entertainment, wireless connections, and navigation into a centralized infotainment system architecture. However, with the rise of sophisticated in-vehicle infotainment ...
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REARVIEW CAMERAS (OFF BATTERY)Rearview cameras are perhaps the most well-known camera subsystem used in advanced driver assistance systems (ADAS) applications. As this feature is being offered and expected in more and more vehicles, these camera systems must offer high integration and fast data processing to enable accurate, real-time monitoring of possible hazards behind the vehicle and channeling information directly to an L...
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REARVIEW CAMERAS (COAXIAL)Rearview cameras are perhaps the most well-known camera subsystem used in advanced driver assistance systems (ADAS) applications. As this feature is being offered and expected in more and more vehicles, these camera systems must offer high integration and fast data processing to enable accurate, real-time monitoring of possible hazards behind the vehicle and channeling information directly to an L...
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FRONT-FACING CAMERAS (OFF BATTERY)Front-facing cameras are an increasingly popular camera subsystem used in advanced driver assistance systems (ADAS) applications. Because this feature is becoming standard in more and more vehicles, off-battery camera systems must offer high integration and fast data processing to enable accurate, real-time monitoring of possible hazards in front of the vehicle, in addition to assisting with integ...
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FRONT-FACING CAMERAS (COAXIAL)Front-facing cameras are an increasingly popular camera subsystem used in advanced driver assistance systems (ADAS) applications. As this feature is being offered and expected in more and more vehicles, these camera systems must offer high integration and fast data processing to enable accurate, real-time monitoring of possible hazards in front of the vehicle, and assist with integrated systems su...
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360° SURROUND VIEW CAMERAS360° surround view cameras help eliminate blind spots for drivers by providing a birds eye view of the car and typically channeling it directly to an LCD display located in the cabins head unit. This image is a composite created from multiple cameras located around the vehicle, usually at least four. Sometimes thought of as the next step in evolution from the backup camera, 360° surround view came...
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EASY, COST-EFFECTIVE PRE-BOOSTER FOR AUTOMOTIVE COLD CRANK CONDITIONSStart-stop functionality is expected to be featured in more and more new car models from any manufacturer. However, this presents a challenge in automotive electronics design as starting the motor in cold weather can make the battery’s voltage drop as low as 3V. This is called a “cold crank.” The power stage for most 12V automotive systems consists of a single buck converter tha...
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MPQ3910A REFERENCE DESIGN - HIGH VOLTAGE BOOST FOR APD IN LIDAR APPLICATIONSAutonomous vehicles have been a hot topic for some time, but now they are staring to become a reality. To enable high degrees of autonomy, vehicles are using combined methods (cameras, radar, and LiDAR) to detect surroundings. LiDAR is a ranged device. It functions similarly to radar, but uses light waves instead of RF waves. A laser diode emits light pulses, and an advanced photodiode (APD) sens...
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E-SCOOTERSE-scooters have quickly risen in popularity in metropolitan areas and quickly growing cities. Lightweight, eco-friendly, and convenient, these e-scooters are two-wheeled battery-operated vehicles that integrate an electric motor and a controller that assists with increased propulsion. Of course, safety, performance, and cost are the greatest concerns for customers in any vehicle. In addition, new ...
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