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DCF803-0035 Switching power supply module
DCF803-0035 The rapid development of the communication industry has greatly promoted the development of communication power supplies. High-frequency miniaturized switching power supply and its technology have become the mainstream of modern communication power supply systems.
DCF803-0035 In the field of communications, the rectifier is usually called the primary power supply, and the DC-DC (DC/DC) converter is called the secondary power supply. The function of the primary power supply is to convert the single-phase or three-phase AC power grid into a DC power supply with a nominal value of 48V. Currently, in the primary power supply used in program-controlled switches, the traditional phase-controlled regulated power supply has been replaced by high-frequency switching power supply. The high-frequency switching power supply (also called switching rectifier SMR) works through the high frequency of MOSFET or IGBT. The switching frequency Generally controlled within the range of 50-100kHz to achieve high efficiency and miniaturization.
DCF803-0035 In recent years, the power capacity of switching rectifiers has continued to expand, and the single unit capacity has expanded from 48V/12.5A, 48V/20A to 48V/200A, 48V/400A.
DCF803-0035 Due to the wide variety of integrated circuits used in communication equipment, their power supply voltages are also different. In the communication power supply system, high-power density high-frequency DC-DC isolated power modules are used to convert the intermediate bus voltage (generally 48V DC) into Various DC voltages are required, which can greatly reduce losses, facilitate maintenance, and is very convenient to install and increase.
DCF803-0035 Generally, it can be installed directly on the standard control panel, and the requirement for the secondary power supply is high power density. As communication capacity continues to increase, communication power supply capacity will also continue to increase.
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