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High-power white LED is a new development in recent years, up to a semiconductor light source, high luminous efficiency, pollution-free, long life, and easy to control brightness, is an ideal green energy-efficient lighting. The white LED has a non-linear load characteristic, minor fluctuations of the power supply voltage will lead to dramatic changes in the load current. Therefore, in order to ensure LED work properly, its current design dedicated source drive. However, due to the development of white LED technology quickly, the endless stream of new LED components and LED application drive the various requirements. Therefore, this paper presents the development of microcontroller-based management, able to adapt to different occasions under car lighting intelligent high-power LED driver, and its basic performance automatic test systems analysis to establish the appropriate test system for LED practical application in specific areas , the correct evaluation of the LED work performance, and further popularize LED technology has great significance. On the basis of analysis of the nonlinear load characteristics of high-power LED, the LED drive control system research; combined PSPICE circuit simulation, based CAN/485 bus control, intelligence, output wide range tune current LED driver design thinking; described key technologies and implementation of key points in the actual development process. At the same time, consider the life of high-power LED light efficiency and color temperature, and other key parameters are sensitive to temperature changes, this paper also proposed a thermoelectric cooler TEC as LED tube body temperature control method, tried active cooling large power LED to achieve longevity, efficient and stable work to develop new ideas. For the development the the LED drive itself, and the detection of the actual needs of the LED characteristics, we developed a test system based on the idea of ??virtual instruments. And discuss design thinking, structural features and some of the specific circuit, built by Universal USB control function the basis of the test module and test software operation interface, pointed out that the typical general-purpose instrument support VISA standard programming control method, a comprehensive The specific method for automated testing of electricity, light, temperature parameters and critical circuit waveform data. Finally, in the description on the basis of the use of the test system, the measured LED drive steady state parameters (current control linearity degrees, power regulation, load regulation, ripple and efficiency, etc.) and dynamic parameters ( Power on / off time, overshoot voltage and system dynamic response time, etc.), the analysis of the test data and its results reflect the performance indicators curves show that the development of the LED drive its automated test system's utility.
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