LED drive power slim panel lights drive external power rectifier transformer 12-18W appropriate ..

LED drive power is the power supply voltage is converted to a specific current to drive the LED light power converter, under normal circumstances: LED drive power inputs including high frequency alternating current (ie, electricity), low-voltage direct current, high-voltage direct current, low-voltage high frequency AC. First, the driver chip is the core power supply --IC drive IC, IC direct impact on the entire supply. Manufacturers of drive IC, are purchased Crystal Park looking to encapsulate a large packaging factory; and small factory driver IC technology is a direct copy of the drive manufacturers design packaging factory to find a small package, can not properly protect the entire batch of IC consistency and stability, resulting in the use of drive power failure for some time somehow. So IC LED on the power supply, refuse polished to lighting manufacturers to understand the driving IC solutions and accounting costs, so that purchasing power products at reasonable prices. Second, the chip can be seen as the power transformer control centers in the brain, but the decision power, temperature and other transformer. Transformer responsible for completing the "AC - magnetic energy - DC" energy overload is saturated bombing. Transformer core component is the core and line package. Quality is the core of the transformer core, but as porcelain in general, difficult to distinguish. Easy to identify the appearance: the appearance of crisp, dense, bright, polished pores while the back for the top grade. Currently Heino core meaning of the use of open-PC44 core, guarantee high efficiency power supply. Line package is winding copper wire is made using copper as a key to the quality of life of the transformer. The same length of copper clad aluminum wire is 1/4 the price of copper lines, due to cost pressures caused transformer manufacturers will often mingled with copper clad aluminum wire package transformer inside. Resulting in transformer failures burned when the temperature rises, causing the power supply and the entire lamp failure. So many lamps, special lamps built-in power tend to ship bombing phenomenon six months or so. And how to identify the copper is pure copper or copper-clad aluminum wire it? Use a lighter to ignite it, fast burnout is copper clad aluminum. Also can be used to identify measuring coil resistance. Third, electrolytic capacitors and chip ceramic capacitor input electrolytic capacitor quality and longevity requirements may we all know, we are also very seriously. However, we tend to ignore the output capacitance of quality, in fact, the output capacitor life a great impact on the power of life. The output of up to 60,000 times per second, switching frequency, resulting in parasitic capacitance increase heat resistance, a similar scale of substance, and finally the electrolyte temperature, exploding. Recommended output of electrolytic capacitors: LED special electrolysis, general models beginning with L. At present our output of electrolytic electrolytic capacitors are Aihua high life. Ceramic Capacitors: material into X7R, X5R and Y5V, while the actual capacitance Y5V can only reach the actual 1/10 refers only to work at the nominal capacitance value 0 volts. So this tiny chip resistors, the option would result in costs of adverse price difference and greatly shorten the power of life. Fourth, the power supply circuit design and product design merits of the discrimination welding process: a professional point of view aside, through some intuitive way to tell, such as component placement and tidy, generous, orderly, spot light net upright. A good engineer is not going to make a disorderly design. As for the fly line, plus manual element, it is a serious lack of performance technical strength. Welding process: hand soldering and wave soldering process, is well known, the mechanized production process quality wave is certainly better than manual welding. Identify the way: Is there a red plastic on the back. (Paste process + welding fixture soldering can be achieved, but the high cost of governance). SMT solder joint testing instruments: AOI. The device can detect the patch process Weld, false welding, weld phenomenon. Currently lamps flash phenomenon occur in use for some time, basically due to a power or light beads Weld result. And Weld detection of this product is extremely difficult to detect by aging out, so we must rely on patch quality AOI detects the power. Fifth, power products batch testing aging aircraft and high-temperature aging materials and production process control even the best power products, or need to detect aging. Because incoming inspection of electronic components and transformers are difficult to control the. Only through a whole lot of power and high-temperature aging room temperature sampling to detect the stability and quality of power supply batch material if there is a security risk. The role of large quantities of high-temperature sampling: the current failure of the power supply is between 1 per thousand to 1%, only thousands of high-temperature aging will find such a failure. Room temperature can simulate power working in harsh environments, sampling under tightened conditions, the bulk of the problem can be found, such as the design is unreasonable, poor materials, deduction fails, the impact of high-voltage switch inside the lamp and the like. Long-term aging at room temperature: screening Weld, weld, collisions and other random failures, early filtered component failure, effectively reduce the failure rate of finished products (down to one-thousandth of one percent). Normal aging aging equipment and personnel-intensive, Nissan 100,000 power plants, aging equipment covering at least 500 square meters, more than ten thousand aging bits and streamline aging industry little.