TY - JOUR
T1 - A Four-Phase Hybrid Step-Up/Down Converter with RMS Inductor Current Reduction and Delay-Based Zero-Current Detection
AU - Park, Inho
AU - Maeng, Junyoung
AU - Jeon, Jinwoo
AU - Kim, Hyunjin
AU - Kim, Chulwoo
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government [Ministry of Science and ICT (MSIT)] under Grant 2019R1A2B5B03100756.
Publisher Copyright:
© 1986-2012 IEEE.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - In this letter, a four-phase hybrid step-up/step-down dc-dc converter with a delay-based zero-current detector (ZCD) is proposed. The proposed power stage operates in step-up or step-down mode depending on the target output voltage. It utilizes hybrid switched-inductor-capacitor and dual-path topologies with multiphase operation to reduce conduction loss due to the dc resistance of the inductor by reducing the rms inductor current (IL). The delay-based ZCD determines the zero-current point of IL with a five-bit binary signal to compensate for the propagation delay between the control and the output signals of the driver. The system is fabricated using 180-nm CMOS technology. The power density is 1.838 A/mm2, and the peak efficiency is measured at 89.49% and 86.83% in the step-down and step-up mode, respectively, with a load current range of up to 2 A.
AB - In this letter, a four-phase hybrid step-up/step-down dc-dc converter with a delay-based zero-current detector (ZCD) is proposed. The proposed power stage operates in step-up or step-down mode depending on the target output voltage. It utilizes hybrid switched-inductor-capacitor and dual-path topologies with multiphase operation to reduce conduction loss due to the dc resistance of the inductor by reducing the rms inductor current (IL). The delay-based ZCD determines the zero-current point of IL with a five-bit binary signal to compensate for the propagation delay between the control and the output signals of the driver. The system is fabricated using 180-nm CMOS technology. The power density is 1.838 A/mm2, and the peak efficiency is measured at 89.49% and 86.83% in the step-down and step-up mode, respectively, with a load current range of up to 2 A.
KW - Continuous output delivery current
KW - hybrid buck-boost converter
KW - multiphase dc-dc converter
KW - rms inductor current reduction
KW - zero-current detector (ZCD)
UR - http://www.scopus.com/inward/record.url?scp=85118265426&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2021.3120988
DO - 10.1109/TPEL.2021.3120988
M3 - Article
AN - SCOPUS:85118265426
SN - 0885-8993
VL - 37
SP - 3708
EP - 3712
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 4
ER -