Communication base stations will use high-frequency switching power supply systems to supply power to communication equipment, and with the rapid development and continuous innovation of power electronics technology, the technology of high-frequency switching power supplies for communications is also constantly innovating and developing; at present, high-frequency switching power supplies have The characteristics of miniaturization, high power density and high efficiency can reduce the occupied space of communication equipment and save the power consumption of communication equipment.
Communication high-frequency switching power supply is to use modern power electronic technology to control the time ratio of the on and off of the switch tube, and realize the rectification and conversion of alternating current into direct current, so as to ensure that the high-frequency switching power supply maintains a stable output voltage, and the high-frequency switching The power supply is controlled by pulse width modulation (PWM), and is mainly an electronic circuit composed of IC and MOSFET.
The communication high-frequency switching power supply is relative to the linear power supply. The input terminal of the internal circuit directly converts the alternating current into direct current, and then under the action of the high-frequency oscillating circuit, the switching tube is used to control the on-off of the current, thus forming High-frequency pulse current; and then with the assistance of inductors or high-frequency transformers, it is ensured that the high-frequency switching power supply outputs stable low-voltage direct current.
The high-frequency switching power supply for communication uses a transformer device inside, but since the size of the transformer core is inversely proportional to the square of the operating frequency of the high-frequency switching power supply, the higher the required operating frequency, the smaller the corresponding transformer core; when the switching power supply When high frequency is selected, the volume and weight of the transformer inside the switching power supply can be greatly reduced, so that the weight and volume of the whole high-frequency switching power supply are smaller and lighter; and because the high-frequency switching power supply directly controls DC, this kind of The efficiency of high-frequency switching power supply is much higher than that of linear power supply, so as to better realize the function of saving energy, so high-frequency switching power supply is used in various fields. However, high-frequency switching power supply also has some disadvantages, such as its electronic circuit is more complicated, maintenance is more difficult, noise is relatively large, and it will pollute the power grid.
Overall, the high-frequency switching power supply has better performance, not only high efficiency, high energy density, but also smaller volume and lighter weight, which can be applied to power supply systems in various fields.