Sinrace Power Supply Technology (Shenzhen) Co., Ltd.

Early 2009, China Science Technology launched the "ten city with thousand cup," semiconductor lighting demonstration cities program, which cause beginning of LED hot spreading in China. Statistics show that Chinese LED industry will reach the scope of 150 billion yuan in the next two years. Thus we see: Op, NVC, TCL, and so on traditional lighting tycoon high-profile enter LED field, almost all of the local lighting companies are excited to the sights in this area ... a "National LED movement " full swing in China.

Despite a growing insiders get out comments about all kinds of worries existing in the LED industry, but still can not stop the majority of companies want to eat this "hot potato" enthusiasm. Enthusiasm needed to support rational, the majority of developers have in the actual development and design process to find ways to overcome the bottlenecks, particularly in testing technology and many other leading Tektronix experts mentioned fever (life), cost, standards in line with the three major challenge.

Customer manager of Tektronix of South China products distributor Chen said: "LED-tube heat is obvious, heat dissipation issues directly affect its alternative in the other fields; currently cost of LED is also high, especially the initial investment, affecting its extension to a broader area; now there is no clear standard interiorly, is expected to form during the year, at this stage to refer to some of the more stringent industry standards to design. "

The other two components giant Murata and experts of Tyco Electronics both mentioned in the speech, for LED lighting applications, heat can not be avoided, because the theory and time have proved, LED performance and lifetime is closed related to the LED pn junction temperature. Overcurrent, overvoltage and overheating will be significantly reduce the shining performance and service life of LED. Before drafting the over-temperature protection program aimed at these conditions, need to refer to the appropriate standards and practical application, in order to obtain the most cost-effective results. Such as traffic lights applications, the temperature may reach the required temperature and then immediately protect and send an alarm notification, so as not to affect the minimum light intensity level achieving related standards requirements, resulting in traffic safety problems; for the road or home lighting, may be started protection when up to a certain temperature, firstly lower the current , to reach the temperature protection Curie point and immediately do protection.

Whether have own protection or not, to drive the LED switching power supply (smps) circuit are regarded as first defense line to ensure system safe and reliable operation, but also are the key to improve the overall efficiency LED lighting systems, reducing the overall cost, achieve the appropriate control functions (such as dimming), thus it must pass the appropriate test solutions to help select and / or determine the active switching devices and the corresponding power circuit design.

From the development angle of LED drive circuit and protection circuit and the actual application, overcoming the three LED major problems as above are based on accurately, reliably and cost-effectively achievement for a variety of test of electrical properties, and especially the electrical performance test of switching power supply , and more emphasis on current test.