Ulrich vom Bauer has more than 20 years of semiconductor experience in technical and marketing positions, working for e.g. for Infineon Technologies, Qimonda, DieLichtLeasing, Q-Cells and Toshiba. His experience covers the whole product cycle from market research, product definition, business development and project management, especially in high volume, price sensitive markets. Key application know how includes mobile phones, PC & Server and LED lighting. At Infineon he is responsible for marketing .dp – DIGITAL POWER 2.0, the next generation power conversion technology. He holds a Degree in Electrical Engineering from the University of Applied Science in Aachen, Germany.
Smart and Secure IOT LED-Streetlight with Digital Driver Technology
Together with industry partners Intel and eluminocity, Infineon developed an IOT streetlight far beyond illumination, into a smart and secure hub that will be at the heart of smart city infrastructure. The solution including radar sensors, power semiconductors, microcontrollers and security chips, is powered by digital driver technology, making the street light very versatile.
The platform is open to 3rd parties to develop innovative applications, making use of the broad sensor networks and infrastructure of the lamp, creating globally connected cities of the future.
Not only the LED light source but also the sensors, microcontroller and communication modules are powered by the latest generation of digital controller. Due to its digital core a variety of systems can be based on the same device and optimized by firmware – even by the control and application server in the lighting or traffic control center. The digital driver technology is easy to connect to communication interfaces and goes hand-in hand with a state-of-the-art security controller, which can be used to ensure authorized access only, thus elimination the danger of hacked lighting networks. The IOT-Streetlight incorporates communication modules based on LTE standards. By advanced control algorithms to realize constant current, constant voltage and limited power control schemes simultaneously. Advantages of these modes include safe operation of temperature sensitive LED´s at any weather condition, resulting in less stress by current overshoots and thus longer lifetime. The two stage Fly back topology provides flicker-free LED lighting and is also compatible with most camera applications. By monitoring the actual light output, feedback to the digital controller can ensure correct light levels despite of aging or wear out of the LEDs. Remote information to technicians allows better planning of maintenance and alarms can flag any premature failure.
Compatible with the highest demands of modern power systems, digital controllers support an input voltage range of 90-305 V AC, an efficiency > 90% and THD < 15%, ensuring compliance with IEC 61000-3-2 class C and provision of a truly universal power supply allowing placement of the IOT streetlights globally. An active PFC and harmonic control that functions across a wide output current range provides a power factor greater than 0.9 in all operating conditions and ensures that additional supply losses due to reactive power and harmonics are minimized.
As detection of objects becomes increasingly important to many smart systems and devices, 24 GHz radar technology is built in for detection of static or moving objects including pedestrians, car traffic or drones. This way the light intensity can be adapted to the actual needs, thus providing a far more efficient solution than the most used ‘always-on’ lighting solutions. Empty parking space detection or intelligent traffic management comes as an add-on. Almost any sensor can be incorporated into these smart lighting hubs. Gas sensors can monitor air quality and audio sensors can recognize noise pollution levels. Specific use cases could include audio-based vehicle accident or gunshot detection.