An important reason for the low life of the LED driver is that the life of the aluminum electrolytic capacitor required for driving the power supply is insufficient. The main reason is that the ambient temperature inside the LED lamp is high during long working hours, which causes the electrolyte of the aluminum electrolytic capacitor to be quickly consumed. Dry, life is greatly shortened, generally only work for about 5,000 hours. The life of the LED light source is 50,000 hours, so the working life of the aluminum electrolytic capacitor becomes the short rib of the life of the LED driving power supply. In order to solve this problem, some suppliers have invented the LED drive power solution without aluminum electrolytic capacitors. But not all LED driver power suppliers are in favor of this approach. Chen Wei pointed out: "There is no one in the current mass-produced LED lighting driver that uses a non-electrolytic capacitor drive solution, because without it, many test standards can not pass, such as EMI test and flicker-free test." The LED driver power solution using aluminum electrolytic capacitors is easy to test. If you change to a thin film capacitor and a ceramic capacitor or tantalum capacitor, what is the situation? The film capacitor should reach the same capacitance (usually 100-220uF), and the volume will be It will be very large, and the cost is too high. The ceramic capacitors generally have too small a capacity. For example, using multiple ceramic capacitors to achieve such a large capacity, the board area and cost are too large, and the tantalum capacitors have such a large capacity, one is too expensive. However, the withstand voltage is too low to meet the requirements, so replacing it with any other type of capacitor is basically not too bulky or too expensive. For example, to replace these capacitors with smaller capacitors, eliminate the ripple effect. Not so good, many of the strict certification test indicators required for export products can not pass, so the current high-quality LED drive power is still commonly used aluminum electrolytic capacitors. Many suppliers claim that the electroless capacitor LED driver solution is likely to remove only the aluminum electrolytic capacitor at the AC input. The aluminum electrolytic capacitor at the constant current output should be difficult to remove or replace. From the architecture of the LED driver power supply, Chen Hao said that Japan and the United States will be dominated by non-isolated solutions because their grid input voltage is only 110V. China and Europe will be dominated by isolated solutions because their grid input voltage is as high as 220V, and the isolation scheme is safe, although the cost may be higher.
Gun safe
Gun safes are secure and protective storage containers for one or more firearms, and/or ammunition for the respective firearms.
Details:
Safes are entirely made of steel;
Made by superior fire-proof materials and special sealing materials;
Shelves are removable and adjustable;
Door bolts are in a 4 way coverage;
All gun safes passed CE certification.
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