Paper Info
Title
11.7 A Voltage-Tolerant Three-Level Buck-Boost DC-DC Converter with Continuous Transfer Current and Flying Capacitor Soft Charger Achieving 96.8% Power Efficiency and 0.87µs/V DVS Rate
Abstract
In recent years, buck-boost converters have been widely utilized for battery-powered mobile systems such as RF power amplifiers, battery chargers, and LED drivers. However, in a wide battery voltage range, they face challenges including dynamic voltage scaling (DVS), wide load current range, and dynamic line/load transients while ensuring reliability for an industrial usage. To resolve these issues, the conventional buck-boost (CBB) converter should overcome the characteristic of discontinuity in the output transfer current (OTC) which causes degradation of loop dynamics and transient response. Several past works with continuous OTC have been proposed to resolve these problems, but their voltage conversion ratios are limited [1], [2]. Moreover, in [3], [4], a high-voltage (HV) process, which necessitates large active area and incurs high fabrication cost, is required to withstand voltage stresses over 10V (2×V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">IN</sub> ) applied across power switches. To overcome the above challenges, this paper proposes a voltage-tolerant three-level buck-boost (TLBB) converter. The TLBB has continuous OTC and uses only normal 5V CMOS devices for its switches. In addition, a voltage-tolerant dual channel-interleaved three-level buck-boost (DTLBB) converter is suggested for applications [5] requiring a wide range of load current and high conversion ratio while supporting fast DVS transition.
Year
DOI
Venue
2020
10.1109/ISSCC19947.2020.9063105
2020 IEEE International Solid- State Circuits Conference - (ISSCC)
Keywords
DocType
ISSN
continuous OTC,continuous transfer current,buck-boost converters,battery-powered mobile systems,battery voltage range,wide load current range,output transfer current,loop dynamics,transient response,voltage conversion ratios,high-voltage process,power switches,voltage-tolerant dual channel-interleaved three-level buck-boost DC-DC converter,flying capacitor soft charger,power efficiency,DVS rate,dynamic voltage scaling,dynamic line-load transients,TLBB converter,CMOS devices,voltage 10.0 V,voltage 5.0 V
Conference
0193-6530
ISBN
Citations 
PageRank 
978-1-7281-3206-8
2
0.47
References 
Authors
2
12
Name
Order
Citations
PageRank
Jong-Beom Baek132.59
Takahiro Nomiyama2143.24
Seungchan Park321.14
Young-Ho Jung422.16
Dong-Su Kim593.25
Jae-yeol Han643.70
Jun-suk Bang7114.24
Yumi Lee820.81
Ik-Hwan Kim952.38
Ji-seon Paek10165.04
jongwoo lee1176.21
Ik-Hwan Kim1242.54