TY - GEN
T1 - Modelling and Control of a Novel High Step-down 48V-1V DC-DC Converter
AU - Chandwani, Ashwin
AU - Mallik, Ayan
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/5/24
Y1 - 2021/5/24
N2 - This paper proposes a novel non-isolated buck- derived resonant DC-DC converter topology that achieves a significantly high step-down gain. Because of the limitations pertaining to the duty cycle limits and constraints related to minimum deadtime requirements that result in reduced efficiency and higher peak stress on power components, it is difficult to attain high step-down with a normal single switch buck converter. Multistage buck-derived topologies, including a greater number of active power devices, make the converter complex and inefficient in many cases. In this work, a novel circuit structure is proposed, that achieves a very high step-down gain without pushing duty cycles to the extreme limits, resulting in an efficient power conversion, making it very relevant to datacenters and point of load applications. To characterize the converter, state space averaging formulation is utilized, and corresponding gain plots have been presented. To examine the converter performance and closed loop performance, the converter is simulated for 200W load in MATLAB/Simulink, and it exhibits over 94% efficiency and 10ms settling time under 50% step change in load power. In addition to that, experimental results are also included for a laboratory proof-of-concept hardware prototype.
AB - This paper proposes a novel non-isolated buck- derived resonant DC-DC converter topology that achieves a significantly high step-down gain. Because of the limitations pertaining to the duty cycle limits and constraints related to minimum deadtime requirements that result in reduced efficiency and higher peak stress on power components, it is difficult to attain high step-down with a normal single switch buck converter. Multistage buck-derived topologies, including a greater number of active power devices, make the converter complex and inefficient in many cases. In this work, a novel circuit structure is proposed, that achieves a very high step-down gain without pushing duty cycles to the extreme limits, resulting in an efficient power conversion, making it very relevant to datacenters and point of load applications. To characterize the converter, state space averaging formulation is utilized, and corresponding gain plots have been presented. To examine the converter performance and closed loop performance, the converter is simulated for 200W load in MATLAB/Simulink, and it exhibits over 94% efficiency and 10ms settling time under 50% step change in load power. In addition to that, experimental results are also included for a laboratory proof-of-concept hardware prototype.
KW - DC-DC topology
KW - Resonance
KW - datacenter
KW - high gain
KW - point-of-load
KW - voltage regulator
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U2 - 10.1109/ECCE-Asia49820.2021.9479277
DO - 10.1109/ECCE-Asia49820.2021.9479277
M3 - Conference contribution
AN - SCOPUS:85114197986
T3 - Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
SP - 708
EP - 713
BT - Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
Y2 - 24 May 2021 through 27 May 2021
ER -