First, look at the appearance process to select the LED display power supply. A good power supply manufacturer is also very strict with the workmanship process, because it can guarantee the batch consistency of the products. An irresponsible manufacturer, the appearance of the power supply, the tin surface, the alignment of the components will never be good.
Second, select the LED display power from the full load efficiency. The efficiency of the power supply is the most important indicator. The high-efficiency power conversion rate of the power supply is high, which not only meets the requirements of energy saving and environmental protection, but also can save power and save money for the user.
Third, the output voltage ripple of the constant voltage power supply is large. The size of the ripple has a very large effect on the life of the electrical equipment, and the smaller the ripple, the better. A
Fourth, observe the temperature rise of the power supply to select the LED display power. The 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 be seen from the aspect of efficiency that the general efficiency and high temperature rise will be small.
Fifth, according to the application field, select the power of each function, such as protection function: over voltage protection, over temperature protection, overload protection, etc.; application functions: signal function, remote control function, telemetry function, parallel function, etc.; special function: work Due to correction (PFC), continuous power (UPS).
Sixth, in order to increase the life of the power supply, it is recommended to use a model with more than 30% output power rating. For example, if the system requires a 100W power supply, it is recommended to select a model with an output power rating greater than 130W, and so on, which can effectively improve the life of the power supply.
Seventh, due to the properties of the LED display products, the instantaneously changing current is usually generated when playing video or picture, which puts strict requirements on the LED power supply. Usually, in order to ensure the normal broadcast of the display screen, a certain margin is reserved for the power supply product. In general, the more the margin is reserved, the more stable the performance of the power supply product is, and the longer the life is. However, this increases the cost of the power supply product, and too much margin is also easy to waste. At present, the industry's LED display power supply is generally reserved 20% - 30% of the margin.
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