Details
| Original language | English |
|---|---|
| Pages (from-to) | 3444-3454 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 38 |
| Issue number | 3 |
| Publication status | Published - 31 Oct 2022 |
Abstract
A hybrid step up/down converter is presented with improved efficiency, smaller form factor and enhanced reliability for Li-ion battery operated power management integrated circuits (PMICs). Utilizing a hybrid structure with one inductor and two flying capacitors, the dual-path buck-boost (DPBB) converter reduces the average inductor current, switch currents, and the required blocking voltage for the power switches. To support a mid-3V output from a Li-ion battery, the converter can be realized using 1.8V rated devices, solely. Additionally, the DPBB facilitates a continuous input and output current delivery, thus improving the reliability of the converter significantly. Besides, leveraging the Li-ion battery charge profile, the topology provides an optimal performance during down-conversion, in which the converter operates for most of its usage time. With reduced inductor current and smaller voltage rated switches, a more compact inductor with a large dc resistance (DCR) can be used to maintain similar efficiency, which in turn helps reducing the converter board-space and associated manufacturing cost. Fabricated in a 180 nm BCD technology, the prototype achieves a peak efficiency of 95.63<inline-formula><tex-math notation="LaTeX">$\%$</tex-math></inline-formula> even for a large 288 m<inline-formula><tex-math notation="LaTeX">$\Omega$</tex-math></inline-formula> inductor DCR with an output ripple below 20mV for a load current up to 700mA.
Keywords
- Buck-Boost converter, Capacitors, Costs, Inductors, Li-ion battery, Lithium-ion batteries, Switches, Topology, Voltage, dc-dc converter, hybrid converter, switched capacitor converter, switched-capacitor (SC) converter, Buck-boost (BB) converter
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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In: IEEE Transactions on Power Electronics, Vol. 38, No. 3, 31.10.2022, p. 3444-3454.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An All-1.8-V-Switch Hybrid Buck–Boost Converter for Li-Battery-Operated PMICs Achieving 95.63% Peak Efficiency Using a 288-m DCR Inductor
AU - Mishra, Arindam
AU - Zhu, Wei
AU - Wicht, Bernhard
AU - Smedt, Valentijn De
N1 - Publisher Copyright: © 1986-2012 IEEE.
PY - 2022/10/31
Y1 - 2022/10/31
N2 - A hybrid step up/down converter is presented with improved efficiency, smaller form factor and enhanced reliability for Li-ion battery operated power management integrated circuits (PMICs). Utilizing a hybrid structure with one inductor and two flying capacitors, the dual-path buck-boost (DPBB) converter reduces the average inductor current, switch currents, and the required blocking voltage for the power switches. To support a mid-3V output from a Li-ion battery, the converter can be realized using 1.8V rated devices, solely. Additionally, the DPBB facilitates a continuous input and output current delivery, thus improving the reliability of the converter significantly. Besides, leveraging the Li-ion battery charge profile, the topology provides an optimal performance during down-conversion, in which the converter operates for most of its usage time. With reduced inductor current and smaller voltage rated switches, a more compact inductor with a large dc resistance (DCR) can be used to maintain similar efficiency, which in turn helps reducing the converter board-space and associated manufacturing cost. Fabricated in a 180 nm BCD technology, the prototype achieves a peak efficiency of 95.63$\%$ even for a large 288 m$\Omega$ inductor DCR with an output ripple below 20mV for a load current up to 700mA.
AB - A hybrid step up/down converter is presented with improved efficiency, smaller form factor and enhanced reliability for Li-ion battery operated power management integrated circuits (PMICs). Utilizing a hybrid structure with one inductor and two flying capacitors, the dual-path buck-boost (DPBB) converter reduces the average inductor current, switch currents, and the required blocking voltage for the power switches. To support a mid-3V output from a Li-ion battery, the converter can be realized using 1.8V rated devices, solely. Additionally, the DPBB facilitates a continuous input and output current delivery, thus improving the reliability of the converter significantly. Besides, leveraging the Li-ion battery charge profile, the topology provides an optimal performance during down-conversion, in which the converter operates for most of its usage time. With reduced inductor current and smaller voltage rated switches, a more compact inductor with a large dc resistance (DCR) can be used to maintain similar efficiency, which in turn helps reducing the converter board-space and associated manufacturing cost. Fabricated in a 180 nm BCD technology, the prototype achieves a peak efficiency of 95.63$\%$ even for a large 288 m$\Omega$ inductor DCR with an output ripple below 20mV for a load current up to 700mA.
KW - Buck-Boost converter
KW - Capacitors
KW - Costs
KW - Inductors
KW - Li-ion battery
KW - Lithium-ion batteries
KW - Switches
KW - Topology
KW - Voltage
KW - dc-dc converter
KW - hybrid converter
KW - switched capacitor converter
KW - switched-capacitor (SC) converter
KW - Buck-boost (BB) converter
UR - http://www.scopus.com/inward/record.url?scp=85141601857&partnerID=8YFLogxK
U2 - 10.1109/tpel.2022.3218376
DO - 10.1109/tpel.2022.3218376
M3 - Article
VL - 38
SP - 3444
EP - 3454
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
SN - 0885-8993
IS - 3
ER -