Fairchild Semiconductor's Global Power ResourceSM Center (GPRC) in China has developed a complete LED street lighting solution with high energy efficiency, excellent thermal performance, and high reliability. Extend the life of the street light.
This performance-optimized solution reduces power consumption and meets the stringent energy efficiency standards and requirements of government agencies around the world, including China's central and provincial agencies, and ENERGY STAR® solid state Lighting-State Lighting (SSL) guidelines; and the increasing demand for more environmentally friendly electronics from consumers and markets further demonstrates Fairchild's leadership in energy efficiency.
Fairchild's new streetlight solution features advanced critical conduction mode (CrCM) PFC, energy efficient DC-DC conversion and constant current control, and includes two parallel or serial in the same PCB layout Secondary solution. From the AC input to the LED side, it provides up to 91.26% (parallel) and 92.6% (serial) energy efficiency at 220V input voltage.
Chen Kunhe, vice president of sales and marketing for Fairchild Semiconductor China and Southeast Asia, said: "Our Chinese GPRC team can provide solutions to meet the thermal management challenges commonly encountered in LED street lighting applications, achieving high efficiency and reducing Power consumption. High system efficiency depends on the performance of each part of the design, and our advanced PFC controllers and LLC ICs ensure maximum power consumption and higher efficiency."
The current of each LED string in the parallel solution is individually controlled, so that if one LED string is open, the remaining LED strings will still function properly. For serial solutions, each LED string has an independent open-circuit protection function. If one LED is open, the remaining LED strings will still work. In addition, if one LED is shorted, the constant current circuit ensures that all other LEDs in the parallel and serial sub-solutions work properly.
This new solution significantly reduces component count compared to traditional solutions, reducing the parallel layout by more than 20 components and the serial layout by 86 components. This solution is extremely reliable with fewer component counts, powerful protection features and higher fault tolerance for LED faults. In developing this total solution, Fairchild GPRC engineers selected a range of components from the company's extensive product portfolio, such as the active power factor correction (PFC) controller FAN7930 to perform boost PFC applications under CrCM. And with the highly integrated Fairchild Power Switch (FPSTM) product, the FSFR2100 provides all the features needed to build a reliable and robust resonant half-bridge converter.
In addition, Fairchild has a wide range of LED lighting solutions for applications ranging from 7W to over 100W, including:
Stand-alone PFC controllers and PFC/PWM combo controllers, as well as PFC controllers using Critical Conduction Mode (CrCM) and Continuous Current Mode (CCM) technology, are designed to Improve system efficiency, reduce system noise, and provide a range of protection features for medium and high power designs
PWM controllers, including stand-alone and highly integrated solutions with MOSFETs, such as the asymmetric half-bridge controller FSFA2100, the LLC resonant controller FAN7621, and the stand-alone LLC resonant controller FAN7621
Primary Side Regulation (PSR) PWM controllers (such as FSEZ1317, FSEZ1317, and FAN103) enable accurate constant current (CC) control and simplify circuit design
Wide range of high voltage MOSFETs, rectifiers and diodes
Chen Kunhe added: "At Fairchild, our first priority is to work closely with our customers to develop practical solutions. Fairchild's GPRC team in China brings innovative, energy-efficient LED lighting solutions to our customers. We are deeply proud of this. We have the latest IC technology and system expertise, and we are constantly providing technical support to our customers, enabling them to quickly deploy this new solution and introduce new LED lighting products to the market. Improve competitiveness."
Fairchild GPRC is a valuable resource for system design engineers, enabling them to quickly differentiate designs and reduce time-to-market. Fairchild's Global Power Resource Center is designed to deliver innovative, energy-efficient solutions for a wide range of applications, both locally and globally. The solution described in this paper was developed by GPRC in China, and Fairchild has a global power resource center in the US, Germany, Korea and Brazil.
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