Choose a power supply for the LED strip

Using a power supply, the voltage of 220 volts is reduced to 12 V, which is necessary for the illumination of most LED lamps, including tapes. Today there is a wide range of PSUs, different in power, size and degree of protection of the case. Of course, for each individual case, you need to correctly select the characteristics of the device so that it lasts a long time and without causing inconvenience. In this article, we will tell you how to choose a power supply for a 12 V LED strip.


The first thing to decide is how much power the power source should be. There are blocks from 20 to 400 watts. To choose the right characteristics, you first need to determine the power of the LED strip, and then add another 20% of the margin to this value.

You can find out the consumption of LEDs from the table:

How much LEDs consume

Unfortunately, it does not indicate how much the 5630 LEDs consume, which are also often used by the population. As a rule, 5630 LED strip consumes about 18 watts per meter (60 LEDs per meter).

As an example, consider how to choose the power of a power supply for a light source with 5050 LEDs (60 pieces per meter). According to the table, such a model consumes 15 W / m. For a 5-meter segment, the power will be 75 watts (15 * 5) and + 20%, we get 90 watts. It is better to choose a 100 W PSU, which will be enough to power the backlight.

By the way controller selection for RGB tape carried out on the same principle!

Degree of protection

The second, no less important selection criterion is the degree of security, the type of housing. Today on sale you can find a power supply for LED strip with a degree of protection IP20, which can be selected only for dry rooms and IP67, the use of which is permissible even in places with high humidity.

PSU types

An unprotected device (in the photo under number 1) is recommended to choose for interior lighting, for example, hidden ceiling lighting in the kitchen. The advantage of such a PSU is that it can be hidden in a ledge, it has compact dimensions.

The aluminum sealed enclosure (second in the photo) is more overall and, moreover, can weigh more than 1 kg, so it is rather problematic to hide it in a room. This type of enclosure is best chosen for installation in rooms with high humidity. Quite often, a block in an aluminum case is used in outdoor advertising to illuminate signboards.

The open type of execution (3) is rarely used, especially for connecting LED strips. This is due to the fact that it needs to be additionally protected from dust and also the dimensions of the device are the largest. The only advantages of this embodiment are low cost.

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These, in fact, are all the recommendations that we wanted to provide you. We hope you understand how to choose a power supply for the LED strip 12 V. Finally, we want to pay attention to a very important nuance - the power source must be designed for a voltage of 12 volts, rather than 24 or 36.You can check this in the specifications, it should be written 220/12!


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