The LED display system power supply needs to use high-quality switching power supply. How to choose the LED display power supply poses certain challenges to the LED display business friends who have just entered the industry. Today, after communicating with people in the industry, the editor of the LED screen network tells you how to choose the power supply of the LED display.
Insiders teach you how to choose LED display power
First, look at the appearance process to choose LED display power. A good power supply manufacturer is also very strict with the workmanship, because only in this way can the batch consistency of products be guaranteed. An irresponsible manufacturer, the appearance of the power supply, the tin surface, and the neatness of the arrangement of the components will definitely not be good.
Second, choose LED display power from full load efficiency. The efficiency of the power supply is one of the most important indicators. The high-efficiency power supply has a high energy conversion rate, which not only meets the requirements of energy conservation and environmental protection, but also can save electricity and money for users.
Third, the output voltage ripple of the constant voltage power supply is large. The size of the ripple has a very large impact on the life of the electrical equipment. The smaller the ripple, the better.
Fourth, select the LED display power supply by observing the temperature rise of the power supply. Temperature rise affects the stability and life of the power supply. The lower the temperature rise, the better the temperature rise. In addition, it can also be seen from the aspect of efficiency that the general high-temperature rise of efficiency will be small.
Fifth, due to the properties of LED display products, currents that change momentarily when playing videos or pictures usually put stricter requirements on the LED power supply. Generally, in order to ensure the normal broadcast of the display screen, a certain margin needs to be reserved for the power supply product. In general, the more margin is reserved, the more stable the performance of the power supply product and the longer the life. However, this will increase the cost of the power supply product. Too much margin reservation is also easy to cause waste. Currently, the industry's LED display power supply is generally reserved 20%-30% of the margin.
Sixth, in order to increase the life of the power supply, it is recommended to choose a model with 30% more output power rating. For example, if the system requires a 100W power supply, it is recommended to choose a model with an output power rating greater than 130W, and so on can effectively extend the life of the power supply.
Seventh, choose the power supply for each function according to the application field, such as protection functions: overvoltage protection, overtemperature protection, overload protection, etc .; application functions: signal function, remote control function, telemetry function, parallel function, etc .; Due to correction (PFC), uninterrupted power supply (UPS).
Secondly, when choosing the power supply of the LED display screen, while stabilizing, dynamic response, interference elimination and other treatments must also be achieved. For the brand problem of LED display power. Some people think that the current LED display power supply technology is mature, and there is no problem in choosing it. The power supply drawings are public. Many so-called advanced power supplies are nothing more than adding some protection and anti-surge design, which is basically redundant in areas with stable voltage. Finally, in addition to the quality of LED display lamp beads, which is a decisive factor affecting light attenuation, junction temperature is an important external factor, so an important way to reduce light attenuation is to improve its heat dissipation. Using a constant voltage power supply will increase the junction temperature, increase the light attenuation, and shorten the life. To supply power to the LED, you must use a constant current power supply. After the current is constant, the current will remain the same no matter how the temperature changes! The junction temperature will not be a vicious circle! It depends on the quality of the power supply control current
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