Types of LED switching power supplies

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    The high frequency of LED switching power supply is its development direction. High frequency makes the switching power supply smaller and allows the switching power supply to enter a wider range of applications, especially in the field of high-tech, which promotes the miniaturization and lightness of high-tech products. In addition, the development and application of switching power supply are of great significance in saving energy, saving resources and protecting the environment. LED switching power supply has three types: non-waterproof, rainproof and waterproof. These are the three most widely used products in the market.

Analysis of design parameters of LED switching power supply

Power density

  Increasing the power density of switching power supplies, making them smaller and lighter, is a goal that people are constantly pursuing. This is especially important for portable electronic devices (such as mobile phones, digital cameras, etc.). There are several specific ways to miniaturize switching power supplies.

  The first is high frequency. In order to achieve high power density of the power supply, the operating frequency of the PWM converter must be increased, thereby reducing the volume and weight of the energy storage components in the circuit.

  The second is to use piezoelectric transformers. The application of piezoelectric transformers can make high-frequency power converters light, small, thin and high power density. Piezoelectric transformers use the unique "voltage-vibration" conversion and "vibration-voltage" conversion properties of piezoelectric ceramic materials to transmit energy. Its equivalent circuit is like a series-parallel resonant circuit, which is a power conversion field. One of the research hotspots in the field.

  The third is to use new capacitors. In order to reduce the size and weight of power electronic equipment, it is necessary to try to improve the performance of capacitors, increase energy density, and research and develop new capacitors suitable for power electronics and power supply systems, requiring large capacitance, small equivalent series resistance (ESR), and small size.
Selection of high-frequency magnetic components in LED switching power supplies

  A large number of magnetic components are used in LED switching power supply systems. The materials, structures and performances of high-frequency magnetic components are different from those of industrial frequency magnetic components, and there are many issues that need to be studied. The magnetic materials used for high-frequency magnetic components are required to have low losses, good heat dissipation performance, and superior magnetic properties. Magnetic materials suitable for megahertz frequencies are of concern to people, and nanocrystalline soft magnetic materials have also been developed and applied.

LED switch use range

  LED switching power supplies are widely used in LED display screens (monochrome door head screens, full-color screens), LED lighting (LED lamps, LED street lamps), LED lighting (guardrail tubes, wall washers, advertising light boxes), and provide power supply for various constant voltage and constant current products. The low voltage current is safe, green and healthy.

Types of LED Drivers

Types of LED Drivers
1.) Constant Current Drivers:
  Constant current drivers, as their name indicates, are specifically designed to deliver a steady current, guaranteeing that the LED consistently emits an unwavering light output. This dedicated flow ensures a couple of key benefits: firstly, it provides a uniform brightness level which is a huge benefit in many applications; secondly, it considerably prolongs the lifespan of the LED, ensuring that users get maximum value from their LED installations. 

2.) Constant Voltage Drivers:
  Differing from their constant current counterparts, constant voltage drivers are committed to providing a set voltage. This characteristic makes them particularly advantageous when several LEDs are connected in parallel configurations. One of their standout advantages is their flexibility: users can easily add or remove LEDs without major complications. But this flexibility does present a potential drawback. 

3.) AC LED Drivers:
  AC LED drivers stand out because they can power LEDs directly from an AC power source. This direct conversion simplifies the design and negates the need for an external converter, making installations tidier and often more straightforward.

4.) DC LED Drivers:
  When powering LEDs from a direct current (DC) source, DC LED drivers come into their own. Renowned for their efficiency and versatility, they have two primary advantages: they excel in energy conversion, ensuring that most of the power is used effectively, and their design flexibility makes them suitable for a myriad of applications. 

5.) Dimmable LED Drivers:
  A significant evolution in LED technology has been the ability to control brightness, and dimmable LED drivers are at the forefront of this revolution. Whether you’re in the market for a 12v dimmable LED driver or a 24v variant, the underlying principle is consistent: they adjust the LED’s output by varying the current. This functionality allows users to set the perfect ambiance, as well as achieve potential energy savings. 

A caveat to consider is their compatibility; not all dimmable drivers will work seamlessly with every dimming technology out there. However, where they truly shine (pun intended) is in scenarios where mood lighting is essential, or in spaces where the light’s intensity needs frequent adjustments, like living rooms or entertainment areas.