How to find the best power supply? Power supply offer power for the case of each hardware, be considered as the power of the computer center, has the direct impact of the whole system, once the power running problems, system operation will be affected, not only interfere with the normal use, but are more likely to cause hardware damage, causing economic loss, so choose a stable output when installed, pure good power supply is really very important. Then, how does the power to achieve a good power supply? Solidly, Nature is the most basic material, which it’s not only the power supply basis and stable operation, and realize the guarantee of high quality power supply, if materials could not get guaranteed, even if the brilliant structure design will not be fully play, and even affect the normal operation of the power supply. Besides,there are three catagetires for protection test: firstly,The completely EMI filter First let's take a look at is the EMI filter circuit, after it is plugged into a power supply for electric, encounter the first line of "level". The mainly EMI filter circuit is the main purpose of the first filtering effect, eliminate the high frequency noise and jamming signal, at the same time, reduce their produce electromagnetic radiation, to reduce radiation leaks. In general, the best converters are usually equipped with two levels of EMI in power supply. Completed the first level of EMI, the secondary EMI filter, can reduce the interference, smooth realization of mains input, but in some poor power, it could save level of EMI, so there is no doubt that will directly affect the stability of the power supply. In terms of materials, EMI circuit mainly by the yellow square X capacitor, blue Y capacitance and the composition of elements such as copper coil inductance. secondly,High quality capacitor is the basis of stability Capacitance as one of the most basic electronic components in the motherboard, video card, power supply and other electronic products are widely used, and its quality is good or bad nature will directly influence the stability and performance of the products. For capacitance, people usually distinguish brand by region, which are mainly domestic and Japanese capacitance of the capacitor, public think good remark of Taiwan series compared the domestic capacitors, the overall performance is better than recognized Taiwan, of course, also converters can have bigger difference in price. thirdly, Active PFC is the efficiency guarantee In energy conservation and emissions reduction is widely recognised by the masses, and earnestly carry out today, the power conversion efficiency has become a user of four points notice when installed. And speaking of power efficiency, are going to have to mention PFC circuit. PFC circuit is the main function of power factor correction, make the power more save electricity. Called the PFC of power factor correction circuit, divided into two kinds of active PFC and passive PFC, although active PFC on cost is higher, but its energy saving effect is more outstanding, also in the market at present the mainstream high-end power base in the use of this design. The DC - DC module is used to improve converter stability, compared to common transformer, transformer in high load and load have difference can keep good stable output. On the circuit board, most of the DC – DC power supply modules are in the power supply circuit of secondary side parts, and is done with two PCB version up to place, can be easily identified. written orginal by Chondatech engineer