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What is the use of a switching power adapter

Release time:

2019-09-26

The switching power adapter converts DC to DC converter. The switching power adapter is composed of full wave rectifier, switch tube, excitation signal, Flyback diode, energy storage inductance and filter capacitor.
The switching power adapter is widely used in telephone slave and master computers, game consoles, language repeaters, Personal stereo, notebook computers, cellular phones and other devices. The switch power adapter has the advantages of compact appearance, easy portability, wide range of applications, suitability for various environments, and reliable quality. Small size and light weight. The switch power adapter does not use a bulky power frequency transformer. Due to the significant reduction in dissipated power on MOS switches, larger heat sinks are also eliminated. Due to these two reasons, the switch power adapter has a small size and light weight. Low power consumption and high efficiency. In the switch power adapter circuit, the switch MOS transistor operates alternately in the on off and off on switching states under the excitation of the excitation signal. The conversion speed is fast, and the frequency is generally above 50kHz. In some advanced switch power supply circuits, it can achieve several hundred or nearly megahertz. This reduces the power consumption of the switching MOS transistor and greatly improves the efficiency of the power supply, which can reach 90%.

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