Selection and connection of the power supply for the LED strip 12 V

In order to connect electrical energy consumers in Russia, the current standards provide for an AC 220 / 380V 50Hz network. Since the power of the LED strips is provided by a pulsed stabilized source with a voltage of 24 or 12V, a device is needed that converts the high alternating voltage into a lower one.

power supply unit for LED strip( AS) successfully handles this task. Stability and duration of the backlight is provided by a competent choice of power supply.

Any of the commercially available models allows operation of the backlight over a wide temperature range, smooths out impulse noise well and has a housing that protects internal components from mechanical damage.

LED Power Supply Scheme -

Power Supply Circuitry It's not so difficult to connect LED tape power with your own hands. The main thing is to follow the advice given below.

Before buying a particular rectifier model( BP), you need to understand how to connect the LED strip to the power supply.

LED tapes can be connected to a power source in various ways. With strict compliance with the power supply scheme for LED strips, even one powerful device is able to provide operation of both one and several highlights.

For parallel connection of the second LED strip to an additional block, an additional extension cable is required, the cross-section of which is at least 1.5 mm. Observing the polarity, one of its ends is connected to the output of the BP, the second - to the strip number 2.In this case, the current will not be applied to the first illuminated tracks, but to the connected wire.

When the application of a large-sized powerful PSU is unacceptable, low-power power supplies for 12-volt LED strips are used. The connection scheme provides for a separate PS for each diode band. It will also need an extension cord, which is connected to the 220 V network and to a specific tape, but its cross-section may be smaller - just 0.75 mm. Although in this case the installation is more complicated, such a connection scheme is often used in practice, since it involves the use of small size PDUs.

Where to hide the power supply of the LED strip?

The location for the BP is selected taking into account:

1. of the connection scheme used;
2. number of devices-rectifiers;
3. dimensions of blocks.

Suitable options for placing a large PSU can be a specially made hole in the furniture or a separate shelf on the wall, equipped with an unvisible side of the table.

In the case of small power units( no more than 250х150х100 mm), everything is much simpler:

1. can be hidden under the ceiling lining;
2. cut out a special place in the plasterboard wall;
3. install the BP in a wall niche.

Power Supply for LED Strip - Species and Features

Unsealed or open units with a capacity of 100W are used to power consumers in closed residential and non-residential premises. Devices of this type are easy to determine: as a rule, they are the largest size and weight, have the corresponding marking IP20.

The walls of the enclosure provide perforation, which provides heat removal, made of plastic or sheet metal. Scope: power supply equipment. Place for placement: special cabinets or hardware niches.

For outdoor use, the power supply for LED strip 12v is suitable, the sealed case is made of aluminum sheet. Although this device has a significant weight( more than 1 kg) and dimensions, it provides excellent heat dissipation, good protection against adverse effects of natural factors( sun, frost, rain, snow) and IP66 marking.100 watts of power of such a power supply will suffice for the operation of lighting from two tapes. Scope: illumination of street signs.

Semi-hermetically sealed( all-weather) can be classified as a universal device. The devices are used both indoors and outdoors. The unit is used for power supply for a 12V LED strip, has an IP54 degree of protection and a sheet metal housing.

The best solution to date is sealed power supply for LED strip with plastic body .The power of the device does not exceed 75 W, it is completely protected from moisture, has small dimensions and weight. Even using two LEDs for powering two LED tapes of this type with 50 watts each, they can be easily hidden from human eyes in any corner of the room. Place of application: interior lighting.

How to calculate the power of the power supply unit?

The power supply of the power supply for the LED strip depends on the load being connected to it. If for small consumers it is sufficient to have a power supply unit of 40 W, then for more solid designs, an instrument with a power of up to 0.5 kW may be needed.

For a competent calculation of the power of the PSU, it is necessary to know:

1. the number of LEDs used for backlighting;
2. load( power consumption), created by 1 meter strip of LEDs - is taken from the table;
3. total length of the tape( standard size - from 1 to 5 m);
4. safety factor kz = 1,2.

1. Define the total load of the .To do this, the consumed power of 1 meter is multiplied by the footprint of the LED tape.

2. To accurately calculate the power of the the total load is multiplied by the factor kz.

Since there is such an element in the connection scheme as an RGB controller, the final power parameter of the PSU is determined taking into account the power of the controller - its value usually does not exceed 5 W.

Popular models of power supplies for connecting LED strips

The modern industry offers the consumer a wide range of power supplies for connecting LED strips. The power supply for connecting groups of LEDs is selected taking into account the voltage parameters necessary for the operation of the backlight( 12 or 24 V respectively), the required power and the place of operation.

Model PV-15.

The smallest power switching power supply for LED strip 12v with a power of 15 W, is used to connect a tape designed for 12 volts. Has a waterproof aluminum housing built-in surge protector, which protects against voltage drops. Estimated operating time exceeds 200 thousand hours. The best option for placing on the street. The price of the product is 560 rubles.a piece.

Model PV-40.

By design - analog PV-15 with increased power parameters - 40 W.It is intended for connection of tapes of light-emitting diodes, working from a voltage of 24/12 volts. PV-40 - a block of LED tape at a price within 1000 rubles.

Model LV-50.

Design feature - sealed plastic housing. The switching power supply is protected against voltage surges, short circuits in the network and is designed for outdoor use.

Built-in surge protector ensures stable operation of the unit in the conditions of Russian electrical networks. Operated at temperatures from minus 25 to plus 40 degrees Celsius. The operating time is more than 200 thousand hours. The price of the product is 1050 rubles.

Model LPV-100.

Switching power supply of medium power - 100 W.It is intended for connection of tapes with a voltage of 24/12 volts, has a hermetic design and a body made of aluminum. The product is characterized by protection from overvoltage, overload, short circuit. Ideal for stable operation in the conditions of Russian electrical networks. The estimated operational period is more than 200 thousand hours. LPV-100 is a high-quality power supply for LED tape, the price of which does not exceed 2250 rubles.

Model SUN-400.

The power unit of high power pulsed type is an excellent solution for the operation of LED strips. It has protection from short-circuit, voltage drops. The principle of cooling is the free convection of air. Provides the operation of tapes rated for 24/12 volts in closed rooms, power - 400 watts. Successfully passed tests on working capacity in the conditions of the Russian electric networks. The price of the product is 3600 rubles.