A Highly Integrated Series–Parallel Switched-Capacitor Converter With 12 V Input and Quasi-Resonant Voltage-Mode Regulation
A Highly Integrated Series–Parallel Switched-Capacitor Converter With 12 V Input and Quasi-Resonant Voltage-Mode Regulation
复制标题
具有 12V 输入和准谐振电压模式调节的高度集成串并联开关电容器转换器
DOI：
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发表时间：
2018
影响因子：
5.5
通讯作者：
J. Stauth
中科院分区：
文献类型：
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作者：
C. Schaef;J. Stauth
本文提出了一种基于改进串并联架构的混合开关电容器转换器的集成电路 (IC) 实现。该转换器在准谐振模式下运行，以调节 12 V 电源的标称 3.7 V 输出。该设计采用零电流检测和嵌套 1-b 调节来自动调节零电流开关状态，简化数字电压模式控制方案的设计，并实现部分零电压开关。修改后的架构能够与单电压额定设备一起运行，而不会降低转换器的电压乘电流积。本文讨论了全 n 通道动力系统的电平转换、栅极驱动和自举的详细信息，包括预充电电路，以促进安全启动。该转换器 IC 采用 180 nm Bulk CMOS 设计，并为功率器件提供 5 V 选项。它在具有 36 nH 0402 电感器的倒装芯片组件中进行了测试，以 87.5% 的效率和 0.23 W/mm3 的功率密度提供高达 4.6 W 的功率。
This paper presents an integrated circuit (IC) implementation of a hybrid switched capacitor converter based on a modified series–parallel architecture. The converter operates in a quasi-resonant mode to regulate a nominal 3.7 V output from a 12 V supply. The design uses zero-current detection and nested 1-b regulation to autotune the zero-current switching state, simplify the design of a digital voltage-mode control scheme, and achieve partial zero-voltage switching. The modified architecture is able to operate with single-voltage rated devices without degrading the voltage times current product of the converter. This paper discusses details of level shifting, gate driving, and bootstrapping for an all n-channel powertrain, including a precharge circuit, to facilitate safe startup. The converter IC was designed in 180-nm bulk CMOS with a 5 V option for power devices. It was tested in a flip-chip assembly with a 36 nH 0402 inductor to deliver up to 4.6 W at 87.5% efficiency at a power density of 0.23 W/mm3.