TY - GEN
T1 - A hybrid DC-DC converter capable of supplying heavy load in step-up and step-down mode
AU - Jeon, Jinwoo
AU - Maeng, Junyoung
AU - Park, Inho
AU - Kim, Hyunjin
AU - Kim, Chulwoo
N1 - Funding Information:
The EDA tool was supported by the IC Design Education Center (IDEC), Korea.
Publisher Copyright:
© 2021 IEEE
PY - 2021
Y1 - 2021
N2 - This paper proposes a hybrid DC-DC converter with a new power switch structure and its operating principles. Its main application is a power management IC that supplies compact mobile devices with a low-profile chip inductor, whose DC resistance is relatively high. In step-down mode, DC current flowing through the inductor is reduced by introducing a flying capacitor that assists load current at a certain phase. In step-up mode, average inductor current is smaller than the load current because of power-input power-output equation. A three-phase mode is also added to fill output voltage gap between step-up and step-down modes. By reducing inductor conduction loss, this work shows better power conversion efficiency than a conventional buck converter at heavy load. Using 180 nm general purpose process, the proposed converter takes 2.5 V input and supplies output in between 1.4 V and 5 V. Load current ranges in between 0.3 A and 1.5 A with peak power conversion efficiency of 92.87%.
AB - This paper proposes a hybrid DC-DC converter with a new power switch structure and its operating principles. Its main application is a power management IC that supplies compact mobile devices with a low-profile chip inductor, whose DC resistance is relatively high. In step-down mode, DC current flowing through the inductor is reduced by introducing a flying capacitor that assists load current at a certain phase. In step-up mode, average inductor current is smaller than the load current because of power-input power-output equation. A three-phase mode is also added to fill output voltage gap between step-up and step-down modes. By reducing inductor conduction loss, this work shows better power conversion efficiency than a conventional buck converter at heavy load. Using 180 nm general purpose process, the proposed converter takes 2.5 V input and supplies output in between 1.4 V and 5 V. Load current ranges in between 0.3 A and 1.5 A with peak power conversion efficiency of 92.87%.
KW - Chip inductor
KW - Heavy load current
KW - Hybrid DC-DC converter
KW - Inductor DC resistance
KW - Low-profile
KW - Power conversion efficiency
KW - Step-down
KW - Step-up
UR - http://www.scopus.com/inward/record.url?scp=85108988586&partnerID=8YFLogxK
U2 - 10.1109/ISCAS51556.2021.9401536
DO - 10.1109/ISCAS51556.2021.9401536
M3 - Conference contribution
AN - SCOPUS:85108988586
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
BT - 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021
Y2 - 22 May 2021 through 28 May 2021
ER -