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
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
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具有连续传输电流和飞跨电容软充电器的 11.7A 耐压三电平降压-升压 DC-DC 转换器，可实现 96.8% 的功率效率和 0.87μs/V DVS 速率
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
T. Cho
中科院分区：
文献类型：
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作者：
Jongbeom Baek;Takahiro Nomiyama;Seungchan Park;Young;Dongsu Kim;Jae;Jun;Yumi Lee;Ik;Ji;Jongwoo Lee;T. Cho
近年来，降压-升压转换器已广泛用于电池供电的移动的系统，例如RF功率放大器、电池充电器和LED驱动器。然而，在宽电池电压范围内，它们面临的挑战包括动态电压缩放（DVS）、宽负载电流范围和动态线路/负载瞬变，同时确保工业应用的可靠性。为了解决这些问题，传统的降压-升压（CBB）转换器应克服输出传输电流（OTC）的不连续性，这会导致回路动态特性和瞬态响应的退化。已经提出了几个过去的工作与连续的OTC来解决这些问题，但他们的电压转换比是有限的[1]，[2]。此外，在[3]、[4]中，需要高电压（HV）工艺来承受施加在功率开关上的超过10 V（2×VIN）的电压应力，该工艺需要大的有源面积并且导致高的制造成本。为了克服上述挑战，本文提出了一种耐电压三电平降压-升压（TLBB）变换器。TLBB具有连续的OTC，并且仅使用正常的5V CMOS器件作为开关。此外，针对需要宽负载电流范围和高转换比同时支持快速DVS转换的应用[5]，建议使用耐压双通道交错三电平降压-升压（DTLBB）转换器。
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×VIN) 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.