广告灯用多大的开关电源

Because the counter has a large amount of metal and needs to be safe, the LED decoration/lighting inside the counter uses a unified 12v/24v specification light chain structure (12v light chain is common, and the use of 220v light chain is prohibited to ensure safety ), each street light chain of Youzisu can be made very long, and can be set high enough to be cascaded with each other at the appropriate junction.
There are many 12v high-current output LED switching power supplies on the market. The power supply is in the shape of an iron box and has heat dissipation. For the device, you need to calculate the power according to the length of the LED light chain, and then select the switching power supply to output the best current.

Generally, a constant voltage switching power supply is used, which outputs 12V power. The current depends on the light strip used.

For example: if you use a five-meter strip of 505060 lamp, you need to use a 12v/6A72W power supply. Basically, one meter is calculated at about 1A, and there will be no problem. The same applies to the 505030 lamp. One meter is calculated as 0.5A, and 5 meters uses a 12V/3A36W power supply.

LED lights generally have 12V/24V power supply voltage and 220V power supply voltage. If the power supply voltage is 220V, there is no need for an external power transformer. The lamp has a built-in transformer and is directly connected to the 220V mains power.

If the power supply voltage is 12V/24V, you need to connect an external 12V/24V power supply, that is, a power transformer to step down the voltage from 220V to 12V/24V. Generally, AC and DC are acceptable, but 12V/24V LED lights are not. Directly connected to 220V power supply.

Extended information:

LED light strips and LED light bars have been widely used in furniture, automobiles, advertising, lighting, ships, bars and other industries.

Installation method

①The width of the four-wire lamp is about 22mm, the thickness is about 8mm, and the weight is about 0.25kg/m (4 meters per kilogram)

②Four-wire The light strip has four wires in total, three rows of lights (note not four rows of lights~~), each row is 1 meter and has 24 lights, 24*3=72. Since the power of each lamp bead is 0.05W, the power of the 72-bead lamp strip is: 72*0.05=3.6W.

③ There is a "scissor" mark on each meter, which can only be cut when the mark is marked. Wrong or partial cutting will cause one meter to not light up! Some will be slightly off when marking. It is best to Before cutting, carefully check the position of the mark and cut according to the unconnected part in the middle. You can see it if you look closely.

Reference source: Baidu Encyclopedia-LED light strip