1、 Composition conditions of LED switching power supply

The electronic components used in LED switching power supplies mainly include LED diodes, IGBTs, and MOSFETs

The three conditions for LED switch power supply:

1. Switch: Power electronic devices operate in a switch state rather than a linear state

2. High frequency: Power electronic devices operate at high frequencies rather than low frequencies close to the power frequency

3. DC: Switching power supplies output DC instead of AC

2、 The Effect of LED Switching Power Supply

LED switching power supply has a circuit to control the switching tube for high-speed on/off. It is to convert direct current into high-frequency alternating current to transform the transformer, so that it can generate one or more sets of required voltages! The reason for converting to high-frequency AC power is that the power of high-frequency AC in the transformer circuit is higher than that of the mains 50Hz or 60Hz. Therefore, switch mode power supply transformers can be made very small in size, and will not be very hot during switch mode power supply operation. The product price is lower than that of power frequency DC stabilized power supplies. If 50Hz or 60Hz is not converted into high-frequency electricity, then switch mode power supplies have no meaning. Switching power supplies can generally be divided into two types: blocking and non blocking. For blocking types, there must be a switching power converter, while for non blocking types, there may not necessarily be a switching power converter. Compared with traditional DC power supplies, switch mode power supplies have the advantages of small size, light weight, and high power.

3、 What is the difference between a regular switch mode power supply and a regular one

1. Significant difference: LED power supply is a constant current source, while general switching power supply is a constant voltage source.

2. The planning difficulties of LED switch power supply are volume and price.

3. LED power supply: The primary requirement is constant current; Secondly, low temperature, low heat, and long lifespan; Then small volume; Waterproof, anti-corrosion, and anti-static again; High frequency pollution. Ordinary power supplies and low-quality LED power supplies suffer from severe high-frequency pollution, and even with inductors and large capacitors for filtering, the output DC waveform is very complex. Poor power supply, the power supply itself may not be damaged, but the lifespan and light decay of the LED are greatly reduced.

4. The LED power supply circuit is actually composed of a switch power supply circuit and a reaction circuit. The reaction circuit samples from the load and adjusts the duty cycle or frequency of the pulse to control the output of the switch circuit.

5. LED switching power supply does not require a rectifier.

6. LED power supply refers to the power supply used to power LED lighting, mostly switch mode power supply, with the characteristic of constant voltage and constant current output.

Article source: Jiangmen LED Switching Power Supply http://www.gddpdz.com/