Abstract
This paper presents a complete mathematical design of the main components of 2 kW, 54 direct current (DC)–DC converter stage, which can be used as the second stage of the two stages of alternating current (AC)–DC telecom power supply. In this paper, a simple inrush current controlling circuit to eliminate the high inrush current, which is generated due to high input capacitor at the input side of the DC–DC converter, is proposed, designed, and briefly discussed. The proposed circuit is very easy to implement in the lab using a single metal–oxide–semiconductor field-effect transistor (MOSFET) switch and some small passive elements. PSIM simulation has been used to test the power supply performance using the value of the designed components. Furthermore, the experimental setup of the designed power supply with inrush current control is built in the lab to show the practical performance of the designed power supply and to test the reliability of the proposed inrush current mitigation circuit to eliminate the high inrush current at initial power application to the power supply circuit. DC–DC power supply with phase shift zero voltage switching (ZVS) technique is chosen and designed due to its availability to achieve ZVS over the full load range at the primary side of the power supply, which reduces switching losses and offers high conversion efficiency. High power density DC–DC converter stage with smooth current startup operation, full load efficiency over 95%, and better voltage regulation is achieved in this work.
Highlights
The spread of 5G technology in communications and telecom systems making universal electronic devices makes 5G technology one of the largest sources of electrical energy consumption, including such electronic devices usually operated with direct current (DC) power, so that the supply alternating current (AC) voltage needs to be rectified
In Region 4, VGS still increases to higher values. If this voltage reaches a value higher than the gate source breakdown voltage (BVGS ), metal–oxide–semiconductor field-effect transistor (MOSFET) may be damaged; MOSFET must be protected at this region from the higher applied voltage; power factor correction (PFC) output stage voltage is divided using resistors R1 and R2 and only a small voltage is required to be applied to the MOSFET
MOSFETs, such as switches from STMicroelectronics company [43]; in this protected switch, when the voltage applied to the switch is more than the breakdown voltage of the Zener, the Zener diode breaks down and the voltage is saturated at the safe limit
Summary
The spread of 5G technology in communications and telecom systems making universal electronic devices makes 5G technology one of the largest sources of electrical energy consumption, including such electronic devices usually operated with DC power, so that the supply AC voltage needs to be rectified. Highly efficient AC–DC power supply with a high power factor has been modified for this purpose. The design of power supply with a high input power factor requires the modifying of the input. The power supply first stage usually includes an electromagnetic interference (EMI) filter, bridge rectifying circuit, boost converter, and output bulk capacitor; by controlling the boost converter operation, the input power factor can Energies 2020, 13, 4301; doi:10.3390/en13174301 www.mdpi.com/journal/energies
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
