Intel 2U ERP2U User Manual

SSI

ERP2U

(Entry Redundant Power 2U)

Power Supply Design Guide

A Server System Infrastructure (SSI) Specification

For 2U Rack Chassis Power Supplies

Version 1.0

SSI

ERP2U Power Supply Design Guide, V1.0

Disclaimer:

THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. WITHOUT LIMITATION, THE PROMOTERS (Intel Corporation, NEC Corporation, Dell Computer Corporation, Data General a division of EMC Corporation, Compaq Computer Corporation, Silicon Graphics Inc., and International Business Machines Corporation) DISCLAIM ALL LIABILITY FOR COST OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS OF USE, LOSS OF DATA OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT, INDIRECT, OR SPECIAL AMAGES, WHETHER UNDER CONTRACT, TORT, WARRANTY OR OTHERWISE, ARISING IN ANY WAY OUT OF USE OR RELIANCE UPON THIS SPECIFICATION OR ANY INFORMATION HEREIN.

The Promoters disclaim all liability, including liability for infringement of any proprietary rights, relating to use of information in this specification. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted herein.

This specification and the information herein is the confidential and trade secret information of the Promoters. Use, reproduction and disclosure of this specification and the information herein is subject to the terms of the S.S.I. Specification Adopter's Agreement.

Copyright  Intel Corporation, Dell Computer Corporation, Compaq Computer Corporation, Silicon Graphics Inc., International Business Machines Corporation, 2000.

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ERP2U Power Supply Design Guide, V1.0

Contents

1 Purpose ..............................................................................................................................................5

2 Conceptual Overview..........................................................................................................................5

3 Definitions/Terms/Acronyms ..............................................................................................................6

4 Mechanical Overview ..........................................................................................................................7

4.1 Recommended Chassis Mounting Method ..........................................................................................8

4.2 Airflow Requirements .........................................................................................................................8

4.2.1 Redundant Cooling .....................................................................................................................9

4.3 Temperature Requirements................................................................................................................9

5 AC Input Requirements.......................................................................................................................9

5.1 AC Inlet Connector............................................................................................................................9

5.2 Redundant AC Inlets..........................................................................................................................9

5.3 AC Input Voltage Specification ......................................................................................................... 10

5.4 Efficiency........................................................................................................................................ 10

5.5 AC Line Dropout.............................................................................................................................. 11

5.6 AC Line Fuse.................................................................................................................................. 11

5.7 AC Inrush........................................................................................................................................ 11

5.8 AC Line Transient Specification........................................................................................................ 12

5.9 AC Line Fast Transient Specification ................................................................................................ 12

6 DC Output Specification ................................................................................................................... 13

6.1 Output Connectors .......................................................................................................................... 13

6.1.1 Required Baseboard power connector ....................................................................................... 13

6.1.2 Optional Processor Power Connector .........................................................................................13

6.1.3 Required Peripheral Power Connectors...................................................................................... 14

6.1.4 Required Floppy Power Connector ............................................................................................ 14

6.1.5 Optional Server Signal Connector ..............................................................................................15

6.2 Grounding....................................................................................................................................... 15

6.3 Remote Sense ................................................................................................................................ 15

6.4 Output Power/Currents .................................................................................................................... 16

6.4.1 Standby Outputs .......................................................................................................................17

6.5 Voltage Regulation ..........................................................................................................................17

6.6 Dynamic Loading .............................................................................................................................18

6.7 Capacitive Loading .......................................................................................................................... 18

6.8 Ripple / Noise.................................................................................................................................. 18

6.9 Redundancy.................................................................................................................................... 19

6.10 Hot Swap Requirements ...............................................................................................................19

6.11 Timing Requirements ................................................................................................................... 21

7 Protection Circuits............................................................................................................................ 24

7.1 Current Limit ................................................................................................................................... 24

7.2 240VA Protection ............................................................................................................................ 24

7.3 Over Voltage Protection ...................................................................................................................25

7.4 Over Temperature Protection ........................................................................................................... 25

8 Control and Indicator Functions .......................................................................................................26

8.1 PSON# ........................................................................................................................................... 26

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ERP2U Power Supply Design Guide, V1.0

8.2 PWOK (Power OK) ..........................................................................................................................27

8.3 SMBus Communication ....................................................................................................................28

8.3.1 Field Replacement Unit (FRU) Signals ....................................................................................... 28

8.3.2 Module FRU Data .....................................................................................................................28

8.3.3 Module FRU Data Format ......................................................................................................... 28

8.4 LED Indicators .................................................................................................................................30

9 MTBF ................................................................................................................................................ 31

10 Agency Requirements ...................................................................................................................... 31

Figures

Figure 1: Enclosure Drawing ...........................................................................................................................7

Figure 2: Output Voltage Timing ................................................................................................................... 21

Figure 3: Turn On/Off Timing ........................................................................................................................ 23

Figure 4: PSON# Signal Characteristics........................................................................................................ 26

Tables

Table 1: Thermal Requirements ......................................................................................................................9

Table 2: AC Input Rating.............................................................................................................................. 10

Table 3: Efficiency ....................................................................................................................................... 10

Table 4: AC Line Sag Transient Performance................................................................................................ 12

Table 5: AC Line Surge Transient Performance............................................................................................. 12

Table 6: P1 Baseboard Power Connector...................................................................................................... 13

Table 7: Processor Power Connector ............................................................................................................ 13

Table 8: Peripheral Power Connectors .......................................................................................................... 14

Table 9: P9 Floppy Power Connector ............................................................................................................ 14

Table 10: Server Signal Connector ................................................................................................................15

Table 11: 350 W Load Ratings...................................................................................................................... 16

Table 12: 480 W Load Ratings...................................................................................................................... 16

Table 13: Voltage Regulation Limits.............................................................................................................. 17

Table 14: Optional +5V Regulation Limits...................................................................................................... 17

Table 15: Transient Load Requirements........................................................................................................ 18

Table 16: Capacitve Loading Conditions ........................................................................................................18

Table 17: Ripple and Noise .......................................................................................................................... 19

Table 18: Output Voltage Timing................................................................................................................... 21

Table 19: Turn On/Off Timing ....................................................................................................................... 22

Table 20: Over Current Protection................................................................................................................. 24

Table 21: Over Current Protection .................................................................................................................25

Table 22: Over Voltage Limits .......................................................................................................................25

Table 23: PSON# Signal Characteristic.......................................................................................................... 26

Table 24: PWOK Signal Characteristics ........................................................................................................ 27

Table 25: FRU Device Information ................................................................................................................ 28

Table 26: FRU Device Product Information Area............................................................................................ 28

Table 27: FRU Device Product Information Area............................................................................................ 29

Table 28: LED Indicators .............................................................................................................................. 30

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ERP2U Power Supply Design Guide, V1.0

1 Purpose

This 2U Rack Power Supply Design Guide defines a common redundant power sub-system used in 2U rack mount servers. The power sub-system is made up of a cage and hot swap redundant power modules. This Design Guide covers the mechanical and electrical requirements of this power sub-system. The requirements of the individual hot swap modules are left open. This power sub-system may range from 350 to 600 watts and is used in a hot swap redundant configuration. The scope of this document defines the requirements for this power assembly. The parameters of this supply are defined in this design guide for open industry use.

2 Conceptual Overview

In the Entry server market, the bulk power system must source power on several output rails. These rails are typically as follows:

• +3.3 V (optional from bulk supply)

• +5 V (optional from bulk supply)

• +12 V

• –12 V

• 5 V standby

NOTE

Local DC-DC converters shall be utilized for processor power, and will ideally convert power from the +12 V rail, however, they may also convert power from other rails.

The bulk power system may be a n+1 redundant power system or a non-redundant power system.

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ERP2U Power Supply Design Guide, V1.0

3 Definitions/Terms/Acronyms

Required The status given to items within this design guide, which are required to

meet SSI guidelines and a large majority of system applications.

Recommended The status given to items within this design guide which are not required to

meet SSI guidelines, however, are required by ma ny system applications.

Optional The status given to items within this design guide, which are not required to

Autoranging A power supply that automatically senses and adjusts itself to the proper

CFM Cubic Feet per Minute (airflow). Dropout A condition that allows the line voltage input to the power supply to drop to

Latch Off A power supply, after detecting a fault condition, shuts itself off. Even if the

Monotonically A waveform changes from one level to another in a steady fashion, without

Noise The periodic or random signals over frequency band of 0 Hz to 20 MHz. Overcurrent A condition in which a supply attempts to provide more output current than

PFC Power Factor Corrected. Ripple The periodic or random signals over a frequency band of 0 Hz to 20 MHz.

meet SSI guidelines, however, some system applications may optionally use these features.

input voltage range (110 VAC or 220 VAC). No manual switches or manual adjustments are needed.

below the minimum operating voltage.

fault condition disappears, the supply does not restart unless manual or electronic intervention occurs. Manual intervention commonly includes briefly removing and then reconnecting the supply, or it could be done through a switch. Electronic intervention could be done by electronic signals in the Server System.

intermediate retracement or oscillation.

the amount for which it is rated. This commonly occurs if there is a "short circuit" condition in the load attached to the supply.

Rise Time Rise time is defined as the time it takes any output voltage to rise from

Sag The condition where the AC line voltage drops below the nominal voltage

Surge The condition where the AC line voltage rises above nominal voltage. VSB or Standby Voltage An output voltage that is present whenever AC power is applied to the AC

MTBF Mean time between failure. PWOK A typical logic level output signal provided by the supply that signals the

10% to 95% of its nominal voltage.

conditions.

inputs of the supply.

Server System that all DC output volt ages are within their specified range.

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SSI

AC AC

Module

AC AC

Optional mounting features for top access

ERP2U Power Supply Design Guide, V1.0

4 Mechanical Overview

STATUS

Required (Optional)

Note: Some features are noted as optional in the enclosure drawing figure below. These features may be use in some chassis designs where only top access is allowed for the cage mounting.

The ERP2U is a power sub-system made up of a cage and redundant, hot swappable power supply modules. A mechanical drawing of the cage is shown below in Figure 1. This cage is intended to be mounted in the system and not redundant or hot swappable. The exterior face of the cage accepts hot swappable power supply modules. The cage distributes output power from the modules to a wire harness. Cooling fans may be located in the modules or cage. If the cooling fans are located in the cage, they may optionally be redundant. If the cage has redundant cooling the cage depth may be extended to allow for the additional series fan. A recommended power supply module solution is the SSI TPS power supply. Refer to www.ssiforum.org for the latest TPS Design Guide. The cage may have IEC inlet connector(s) and EMI filtering to distribute AC power to the power supply modules or the AC may plug directly into the modules. Three different configurations of the power sub-system are also shown below in Figure 1.

mounting of the power supply.

Allow for 1.2mm protrusion (x4)

Power Module

Configuration Options

Module Module

Module

SSI TPS Power Supply Configuration No Fans in modules AC inlets and EMI filter in cage Optional Dual AC Inlets Optional 3.3V, 5V DC/DC converters in cage

Vertical Power Supply Configuration Fans in modules AC inlets on modules Dual AC Inlets Optional 3.3V, 5V DC/DC converters in cage

Horizontal Power Supply Configuration Fans in modules AC inlets on modules Dual AC Inlets Optional 3.3V, 5V DC/DC converters in cage

Figure 1: Enclosure Drawing

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ERP2U Power Supply Design Guide, V1.0

4.1 Optional Chassis Mounting Features

STATUS

Optional

The optional top access mounting method fastens to the system chassis via three mounting holes; two on the exterior face and one with the tab on the interior face of the cage. There are also four rectangular cutouts on the bottom of the cage. These are intended to drop over the top of rectangular features in the bottom of the chassis. This will help position the cage and secure it laterally. The features in the chassis are shown below as a reference.

4.2 Airflow Requirements

STATUS

Recommended

The power supply cooling, whether in the cage or the module, shall have a two-speed fan(s) and provide cooling to both the supply and the system. During low-speed fan operation, the power supply must not exceed a noise level of 43 dBa measured at one meter on all faces. At low fan speed, the power supply shall provide a minimum of 6 CFM. At high fan speed, the power supply shall provide a minimum of 9 CFM.

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ERP2U Power Supply Design Guide, V1.0

4.2.1 Redundant Cooling

STATUS

Recommended

It is recommended that the power supply cooling be redundant. This means the cooling device is located in the hot swap power supply modules or there are redundant devices located on the cage.

4.3 Temperature Requirements

STATUS

Recommended

The power supply shall operate within all specified limits over the Top temperature range. All airflow shall pass through the power supply and not over the exterior surfaces of the power supply.

Table 1: Thermal Requirements

ITEM DESCRIPTION MIN MAX UNITS

Top T

non-op

Operating temperature range. 0 50 Non-operating temperature range. -40 70

°C °C

The power supply must meet UL enclosure requirements for temperature rise limits. All sides of the power supply with exception to the air exhaust side, must be classified as “Handle, knobs, grips, etc. held for short periods of time only”.

5 AC Input Requirements

STATUS

Required

The power supply modules shall incorporate universal power input with active power factor correction, which shall reduce line harmonics in accordance with the EN61000-3-2 and JEIDA MITI standards.

5.1 AC Inlet Connector

STATUS

Required

The AC input connector shall be an IEC 320 C-14 power inlet. This inlet is rated for 15 A/250 VAC. This connector may be located on the module or on the cage.

5.2 Redundant AC Inlets

STATUS

Recommended

The power supply assembly may have dual redundant AC inlets. The power supply shall be able to operate over its full, specified range of requirements with either or both AC input powered. If there is a loss of one AC inlet the

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ERP2U Power Supply Design Guide, V1.0

power supplies shall continue to operate with no interruption of performance. It is required that all redundant power supply modules be present to support redundant AC inlets.

5.3 AC Input Voltage Specification

STATUS

Required

The power supply must operate within all specified limits over the following input voltage range. Harmonic distortion of up to 10% THD must not cause the power supply to go out of specified limits. The power supply shall operate properly at 85 VAC input voltage to guarantee proper design margins.

Table 2: AC Input Rating

PARAMETER MIN RATED MAX 350W Max

Voltage (110) 90 V

Voltage (220) 180 V

Frequency 47 Hz 63 Hz

1 Maximum rated input current is measured at 100 VAC and 200 VAC.

100-127

rms

200-240

rms

140 V

264 V

5.5 A

rms

2.3 A

rms

Rated Input

Current

rms

480W Max

Rated Input

Current

7.0 A

rms

3.5 A

rms

5.4 Efficiency

STATUS

Required

The power supply shall have a minimum efficiency shown in the table below for the different power ratings. The power dissipated within the sub-system shall be kept to less than 150W. The sub-system shall meet the minimum efficiency at 100VAC and maximum output load.

Table 3: Efficiency

Output

Power

350W 70%

Minimum

Efficiency

480W 77%

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