Forum: New Products |
Fairchild Semiconductor's China-based Global Power Resource Center (GPRC) has developed a complete LED street lighting solution that provides high efficiency and outstanding thermal performance -- as well as high reliability -- to increase the lifetime of street lamps.
The performance-optimized solution validates Fairchild's strong energy-efficiency reputation by reducing power consumption in order to meet and exceed the increasing demand for greener electronics. This demand has been driven by consumers as well as governments and regulatory standards worldwide - including China's central and provincial authorities and ENERGY STAR's Solid-State Lighting (SSL) guidelines.
Fairchild's new solution features advanced critical conduction mode (CrCM) PFC, high-efficiency DC-DC and constant current control. This total solution includes two sub-solutions, either parallel or serial, within the same PCB layout delivering up to 91.26 percent and 92.6 percent efficiency respectively from AC input to the LED side, under 220V input voltage.
"Our China GPRC team assists customers by providing solutions that overcome thermal management challenges normally associated with LED street lighting, and by achieving high efficiency and decreasing power consumption," said Benjamin Tan, Fairchild's regional vice president of Sales and Marketing, China and South East Asia. "High system efficiency depends on the performance of each section of the design. Our leading edge PFC controller and LLC ICs ensure minimum power loss and deliver higher efficiency."
The parallel solution features independent current regulation for each LED string. Therefore, if one string has an open circuit the other strings can still function normally. For the serial solution, independent open circuit protection for each string enables the other LEDs to still work normally even if one LED string experiences an open circuit. If an LED short circuit happens, the constant current circuits ensure all the other LEDs work normally in both parallel and series sub-solution.
This new solution significantly lowers component count by more than 20 for the parallel layout and 86 for the serial layout compared to conventional solutions. Fewer components, robust protection functionality and high LED fault tolerance capability make the solution very reliable.
Fairchild's GPRC engineers deployed a range of parts from the company's comprehensive portfolio to develop this total solution such as the FAN7930, an active power factor correction (PFC) controller designed for boost PFC applications operating in CrCM; the highly integrated Fairchild Power Switch (FPS), the FSFR2100 offers everything necessary to build a reliable and robust resonant half-bridge converter.
In addition, Fairchild's LED lighting solutions are available for applications with output power requirements ranging from <7W up to >100W.
Fairchild's Global Power Resource Centers are a valuable resource for system design engineers, enabling them to quickly differentiate their designs and shorten time-to-market.