A 3-Phase Resonant Switched Capacitor Converter Delivering 7.7 W at 85% Efficiency Using 1.1 nH PCB Trace Inductors
A 3-Phase Resonant Switched Capacitor Converter Delivering 7.7 W at 85% Efficiency Using 1.1 nH PCB Trace Inductors
复制标题
A%203-Phase%20Resonant%20Switched%20Capacitor%20Converter%20Delivering%207.7%20W%20at%2085%%20Efficiency%20Using%201.1%20nH%20PCB%20Trace%20Inductors
DOI：
10.1109/jssc.2015.2462351
复制
发表时间：
2015
影响因子：
5.4
通讯作者：
J. Stauth
中科院分区：
文献类型：
--
作者：
C. Schaef;J. Stauth
近年来，一直在推动高密度和单片DC-DC转换器，以支持高性能和移动的计算、消费电子和可再生能源等应用。开关电容（SC）转换器已开始在许多此类应用中获得牵引力，但仍然受到基本限制，这些限制促使它们走向昂贵的工艺选项和高开关频率。可变调节对于SC方法是具有挑战性的，并且以较低的功率密度和效率为代价。这项工作提出了一种谐振开关电容器（ReSC）拓扑结构，通过引入少量电感与飞跨电容器串联，消除电荷共享损耗，从而实现低成本工艺选项中的高效操作，从而解决了其中的一些挑战。三相交错式拓扑结构可提供高达7.7 W的85%的效率（功率密度为0.91 W/mm 2或6.4 kW/in 3），使用自举n沟道功率链和嵌入倒装芯片组件中的个位数nH电感器。我们还提出了第一个实现高效的，完全可变的转换比在硅ReSC集成电路没有重新配置或增益跳变。
In recent years, there has been a push towards high-density and monolithic DC-DC converters to support applications such as performance and mobile computing, consumer electronics, and renewable energy. Switched capacitor (SC) converters have started to gain traction for a number of these applications, but are still subject to fundamental limitations that drive them towards expensive process options and high switching frequencies. Variable regulation is challenging with the SC approach, and comes at the cost of lower power density and efficiency. This work presents a resonant switched capacitor (ReSC) topology that addresses some of these challenges by introducing a small amount of inductance in series with the flying capacitor, eliminating charge-sharing losses and thus allowing efficient operation in a low-cost process option. The three-phase interleaved topology can deliver up to 7.7 W at 85% efficiency (power density of 0.91 W/mm 2 or 6.4 kW/in 3) using a bootstrapped n-channel power train and single-digit nH inductors embedded in a flip-chip assembly. We also present the first implementation of efficient, fully-variable conversion ratios in a silicon ReSC integrated circuit without reconfiguration or gain-hopping .