Three methods to help LED switching power supply realize the "dream" of miniaturization

LED switching power supply is a new type of switching power supply controlled by PWM technology, that is, pulse width modulation technology. The circuit controls the switch tube to perform high-speed on and off. It converts direct current into high-frequency alternating current to transform the converter so that it can generate one or more sets of voltages required. The reason for converting to high-frequency alternating current is that the efficiency of high-frequency alternating current in the transformer circuit is higher than that of 50Hz or 60Hz mains electricity. It is of great significance in saving energy, saving resources and protecting the environment.

In this case, how should we make the LED switching power supply more miniaturized? Here are three specific methods:

First, adopt new capacitors. In order to reduce the size and weight of power electronic equipment, it is necessary to improve the performance of capacitors, increase energy density, and research and develop new capacitors suitable for power electronics and power supply systems, which require large capacitance, small equivalent series resistance (ESR), and small size.

Second, the application of 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" and "vibration-voltage" conversion properties of piezoelectric ceramic materials to transmit energy. Its equivalent circuit is like a series-parallel resonant circuit, which is one of the research hotspots in the field of power conversion.

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