　　 LED display power supply as an important part of providing power supply system, choose a qualified and reliable power supply, the LED display energy saving effect and service life are obviously improved, then how to correctly identify and select a qualified LED display What about the power supply ?
1 , look at the appearance of the process to choose 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.
2 , 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.
3. Select the power source that matches the life of the LED chip.
The life of the drive power is maximized to match the life of the LED display chip.
4 , observe the temperature rise of the power supply to select the LED display power supply
The temperature rise affects the stability and life of the power supply, and the lower the temperature rise, the better. In addition, it can be seen from the aspect of efficiency that the general efficiency and high temperature rise will be small.
5 , instantaneous current changes during large screen playback
Due to the properties of LED display products, instantaneously changing currents are usually generated when playing video or pictures, which imposes strict requirements on LED power supplies. 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 for 20% - 30% of the margin.
6. Select the power supply for each function according to the application field.
Such as protection functions: over voltage protection, over temperature protection, overload protection, etc .; application functions: signal function, remote control function, telemetry function, parallel function, etc .; special functions: power factor correction (PFC) , continuous power (UPS) .
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