服务器电源规范

服务器电源规范

作者:海侧卫 出处:太平洋电脑网

【导读】在服务器各个部件中，电源负责各配件能量的供给，担当着非常重要的角

色，其重要性不言而喻。在我们平时DIY台式机时，很多老鸟都非常重视电源的选择。

在服务器领域，电源可谓是重中之重。

在服务器电源方面，主要是SSI规范。SSI（Server System Infrastructure）规范是Intel联

合一些主要的IA架构服务器生产商推出的新型服务器电源规范。SSI规范的推出是为了规范服务器

电源技术，降低开发成本，延长服务器的使用寿命而制定的，主要包括服务器电源规格、背板系统

规格、服务器机箱系统规格和散热系统规格。

WTX

WTX is a new Intel?board-set and system form factor developed for the mid-range

workstation market segment. This specification defines the board-set volume, interface

between the board-set and chassis, and required chassis and power supply features. The

specification also provides design suggestions for thermal management and

electromagnetic interference and containment. WTX power supplies come in three wattage

levels - 460-watts, 610-watts and 800-watts. Several manufacturers of Intel?architecture

based workstations collaborated to define the WTX form factor and to incorporate flexibility

to accommodate the best designs for current and future mid-range workstations. The WTX

specification is provided for widespread use in many types of systems. The specification

and other information on WTX are available through the following web site:

/

SSI的四种子规范

SSI

An Intel?led initiative called the ssI initiative, is an effort designed to help the industry

develop a common set of server element specifications, and thus lay the groundwork for

future growth in the server market. The initiative is similar to such desktop PC efforts as

ATX and NLX in that it is working to define common packaging elements for the server

market. The power supply specifications associated with this spec are as follows: DPS:

Distributed Power Supply MPS: Midrange Power Supply EPS: Entry Power Supply TPS:

Thin (low profile) Power Supply A-D2D: Advanced DC-DC Converter B-D2D: Basic DC-DC

Converter More information can be found at the following URL:

/html/

根据使用的环境和规模的不同，SSI规范又可以分为EPS、TPS、MPS、DPS四种子规范。

EPS规范（Entry Power Supply Specification）：主要为单电源供电的中低端服务器设计，

设计中秉承了ATX电源的基本规格，但在电性能指标上存在一些差异。它适用于额定功率在300W～

400W的电源，独立使用，不用于冗余方式。后来该规范发展到EPS12V（Version2.0），适用的额定

功率达到 450W～650W。

EPS

Part of the Intel?ssI Initiative, the EPS ?Entry-Level Power Supply Specification?defines a

common power supply used in entry-level servers. This supply may range typically from

300 to 400 watts and is used in a single configuration. The scope of this document defines

the volume and connector of the supply, without defining the exact wattage capacity. This

allows vendors the flexibility to produce supplies with different feature sets that have

potential applications for a wide range of system vendor platforms. Because of its

connector leads, the entry-level power supply is not intended to be a hot swap type of

power supply. Its?design leverage comes from the ATX style power supply, which defines a

connector allowing the wattage range to be extended from 300 to 400 watts. The size of

this power supply is the same as the ATX power supply - 5.91W x 3.39H x 5.51D inches

(150W X 86H X 140D mm).

TPS规范（Thin Power Supply Specification）：具有PFC(功率因数校正)、自动负载电流分

配功能。电源系统最多可以实现4组电源并联冗余工作，由系统提供风扇散热。 TPS电源对热插拔

和电流均衡分配要求较高，它可用于N+1冗余工作，有冗余保护功能。

TPS

Part of the Intel?ssI Initiative, the TPS 揟hin Power Supply Specification?is intended to

define two types of power supplies for use in low profile servers. This supply may be either

a 180W or a 275W power supply with 6 outputs; 3.3V, 5V, 12V, -12V, 5VSB, and Vbias.

This power factor corrected power supply module is redundant with active load sharing

capabilities and hot swappable. The module accepts an AC input from an external EMI

filter. The power supply docks into a power supply enclosure or system, which contains the

AC EMI filter and power distribution to the system. The supply is intended to operate with

up to 4 modules in parallel. The power supply is intended to operate properly when in

parallel with a different manufacturer抯 power supply. The specification contains

requirements to enable load-sharing compatibility for paralleling different manufacturer抯

power supplies in the same system. The power supply does not need to contain the main

EMI AC input filter. The power supply module has a size of 3.1W x 1.45H x 10D inches

(78.8W x 36.8H x 254D mm).