Design of a Ring-Type SC DC-DC Converter with Bootstrapped Gate Transfer Switches
Design of a Ring-Type SC DC-DC Converter with Bootstrapped Gate Transfer Switches
复制标题
带自举栅极转换开关的环型 SC DC-DC 转换器的设计
DOI：
10.1541/ieejeiss.123.1700
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发表时间：
2003
影响因子：
--
通讯作者：
T. Inoue
中科院分区：
文献类型：
--
作者：
K. Eguchi;T. Tabata;Hongbing Zhu;F. Ueno;I. Oota;T. Inoue
提出了一种采用新型自举门极转移开关的环型SC DC-DC变换器。自举栅极传输开关用于实现更高的效率。在所提出的自举电路中，功率转换器的最大电压通过由二极管构成的最大电路被充电到电容器。该自举电路通过在功率开关管的栅极和最大值电路的输出端之间引入充电电容，避免了功率开关管的阈值电压降。针对采用1.2 μm CMOS工艺设计的DC-DC变换器，进行了SPICE仿真，研究了电路的特性。SPICE仿真结果表明，当输出负载Ro > 200 Ω时，采用该自举电路的DC-DC变换器的效率大于90%.当Ro = 100 Ω时，该电路的效率比传统变换器提高了8.7%.实验结果也证实了自举电路设计的正确性。
In this paper, a ring-type SC DC-DC converter with novel bootstrapped gate transfer switches is proposed. The bootstrapped gate transfer switches are used to achieve higher efficiency. In the proposed bootstrap circuit, maximum voltage of the power converter is charged to a capacitor via maximum circuits constructed with diodes. By connecting the charged-capacitor between the gate terminals of power-switches and the output terminal of the maximum circuit, the bootstrap circuit avoids the threshold voltage drop of power-switches. Concerning the DC-DC converter designed by a 1.2 μm CMOS technology, SPICE simulations are performed to investigate the characteristics of the circuit. The SPICE simulations show that the efficiency of the DC-DC converter with proposed bootstrap circuits is more than 90 % when the output load Ro satisfies Ro > 200 Ω. When Ro = 100 Ω, the proposed circuit can improve efficiency up to 8.7 % of a conventional converter. The validity of the circuit design for the bootstrap circuit is also confirmed by experiments.