A 12- or 48-V Input, 0.9-V Output Active-Clamp Forward Converter Power Block for Servers and Datacenters
A 12- or 48-V Input, 0.9-V Output Active-Clamp Forward Converter Power Block for Servers and Datacenters
复制标题
适用于服务器和数据中心的 12V 或 48V 输入、0.9V 输出有源钳位正激转换器电源模块
DOI：
--
复制
发表时间：
2020
影响因子：
6.7
通讯作者：
P. Coteus
中科院分区：
文献类型：
--
作者：
Xin Zhang;Bai Nguyen;Andrew Ferencz;T. Takken;R. Senger;P. Coteus
DC-DC电源是高性能计算和数据中心服务器中处理器的关键组件。从中间总线电压（例如，12或48 V）到处理器核心电压（12.9 V）的转换必须高效、紧凑且经济。本文提出了两个版本的有源箝位正激变换器（ACFC）的电源块提供核心电压从12或48 V的中间总线电压。ACFC电源模块可以在组装前单独测试，并垂直焊接到主板上，以适合标准1U服务器。设计了一种低损耗、紧凑型平面Transformer，并将其封装在ACFC功率块印刷电路板（PCB）上。定制的立式平板电感器不仅提供高电感和高饱和电流，还有助于机械支撑电源模块。单片铜绕组将Transformer连接到电感器，从而降低了电流路径中的直流损耗。实验结果表明，90.4%（12 V输入）和89.5%（48 V输入）与0.9 V输出的峰值效率。
DC-to-DC power supplies are critical components for processors in high performance computing and datacenter servers. Conversion from an intermediate bus voltage (e.g., 12 or 48 V) to the core voltage (∼0.9 V) of processors must be efficient, compact, and cost effective. This paper proposes two versions of active-clamp forward converter (ACFC) power blocks to supply core voltage from either 12 or 48 V intermediate bus voltage. The ACFC power block can be individually tested prior to assembly and vertically soldered onto the motherboard to fit in a standard 1U server. A low loss, compact planar transformer is designed into the ACFC power block printed circuit board (PCB). A custom, standing slab inductor not only provides high inductance and high saturation current but also helps to mechanically support the power block. A one-piece copper winding connects the transformer to the inductor, thereby reducing the dc loss in the current path. Thorough analysis is performed to model the conversion loss of the proposed power block. Experimental results show a peak efficiency of 90.4% (12 V input) and 89.5% (48 V input) with 0.9-V output.