2011 is the year of the rapid development of led high bay lighting industry, governments around the world promote to promote the vigorous development. The world today need to use lighting each year 12 billion, the largest consumption of electrical products.
Recently, the phosphor bizarre sharp price increases, resulting in the increase in the cost of fluorescent lamps; LED lighting chips manufacturing technology development strides to promote its rapid decline in the cost of the end of the year to next year Q2 estimates a maximum decrease of 30-50%; nuclear power in Japan after the earthquake making the post-earthquake reconstruction of the market demand for LED lighting to grow rapidly.
Drive power LED lighting chips, most of simulation technology, but also the design of digital technology. Power analog integrated circuit design including: topology design, algorithm design, logic design, circuit design, layout design, involving a wide range of workload is complicated, you must use the science of computer hardware and software tools to accelerate the design cycle. The topology design is the definition developed by the chip set, the rest are of service to achieve this purpose. Topology design technology is relatively mature, the AC / DC LED driver chip, the most used topology is the Fly-back (isolation), Buck-Boost, Buck (non-isolated); “control mode” voltage type and current type; working model “of the CCM (continuous mode), DCM (discontinuous mode), BCM / CRM (critical mode), the PFM (Pulse Width modulation).
Algorithm design of the analog power chips “is part of the chip in the system design. The core part of the system definition is to implement this algorithm. Of course, include other special features and basic functions.