TY - GEN
T1 - A Single-Mode Dual-Path Buck-Boost Converter with Reduced Inductor Current Across All Duty Cases Achieving 95.58% Efficiency at 1A in Boost Operation
AU - Cho, Donghee
AU - Cho, Hyungjoo
AU - Oh, Sein
AU - Jung, Yoontae
AU - Ha, Sohmyung
AU - Kim, Chul
AU - Je, Minkyu
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - In mobile devices, there are various functional blocks requiring different voltage levels, which should be generated from a single lithium-ion battery (Fig. 1), and 3.3V is one of the most demanded voltage levels. Since the battery output voltage discharges gradually from 4.2 to 2.9V, it requires a buck-boost converter that addresses the following challenges. 1) Due to ever-increasing load-current $(\mathsf{I}_{\mathsf{LOAD}})$ demands in the mobile device, the conduction loss by the DC resistance (DCR) of the inductor overwhelms other losses, especially when a small-size inductor is used. 2) At large $\mathsf{I}_{\mathsf{LOAD}}$, the battery output voltage decreases due to its internal resistance, making the boost operation more dominant. 3) Due to the controllability of display brightness and processing speed, burst currents are generated, resulting in unpredictable input voltage fluctuations.
AB - In mobile devices, there are various functional blocks requiring different voltage levels, which should be generated from a single lithium-ion battery (Fig. 1), and 3.3V is one of the most demanded voltage levels. Since the battery output voltage discharges gradually from 4.2 to 2.9V, it requires a buck-boost converter that addresses the following challenges. 1) Due to ever-increasing load-current $(\mathsf{I}_{\mathsf{LOAD}})$ demands in the mobile device, the conduction loss by the DC resistance (DCR) of the inductor overwhelms other losses, especially when a small-size inductor is used. 2) At large $\mathsf{I}_{\mathsf{LOAD}}$, the battery output voltage decreases due to its internal resistance, making the boost operation more dominant. 3) Due to the controllability of display brightness and processing speed, burst currents are generated, resulting in unpredictable input voltage fluctuations.
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U2 - 10.1109/CICC53496.2022.9772861
DO - 10.1109/CICC53496.2022.9772861
M3 - Conference contribution
AN - SCOPUS:85130712532
T3 - Proceedings of the Custom Integrated Circuits Conference
BT - 2022 IEEE Custom Integrated Circuits Conference, CICC 2022 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 43rd Annual IEEE Custom Integrated Circuits Conference, CICC 2022
Y2 - 24 April 2022 through 27 April 2022
ER -