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manual EPS1U Power Supply Design Guide, A Server System Infrastructure SSI Specification
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EPS1U
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Specs
LED Indicator
Output Power/Currents
AC Inlet Connector
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SSI
EPS1U Power Supply Design Guide, V1.1
EPS1U
Power Supply Design Guide
A Server System Infrastructure (SSI) Specification
For 1U Rack Chassis Power Supplies
Version 1.1
Page 2
Page 1
Image 1
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Contents
A Server System Infrastructure SSI Specification
EPS1U Power Supply Design Guide
For 1U Rack Chassis Power Supplies
EPS1U Power Supply Design Guide
Disclaimer
EPS1U Power Supply Design Guide
DC Output Specification
Contents
Control and Indicator Functions
Purpose
Tables
Figures
EPS1U Power Supply Design Guide
2 Conceptual Overview
1 Purpose
Table 1 Definitions, Terms, and Acronyms listed alphabetically
3 Definitions/Terms/Acronyms
EPS1U Power Supply Design Guide
4 Mechanical Overview
4.1 High Power Card Edge Form Factor
Figure 1 Enclosure Drawing
Figure 2 Alternate Enclosure Drawing
4.2 Alternate Enclosure
EPS1U Power Supply Design Guide
AC I/P
4.4 Temperature Requirements
4.3 Airflow Requirements
Table 2 Thermal Requirements
5.2 AC Input Voltage Specification
5.1 AC Inlet Connector
5 AC Input Requirements
5.3 Input Under Voltage
5.5 AC Line Dropout
5.4 Efficiency
5.6 AC Line Fuse
5.7 AC Inrush
5.9 AC Line Fast Transient Specification
5.8 AC Line Transient Specification
Table 4 AC Line Sag Transient Performance
Table 5 AC Line Surge Transient Performance
6.1 Connector
6 DC Output Specification
Table 6 Edge Finger Pinout
Figure 3 Edge Finger Layout
6.2 Grounding
6.4 Output Power/Currents
6.3 Remote Sense
Table 8 250 W Load Ratings
Table 7 125 W Load Ratings
Table 9 350 W Load Ratings
6.4.1 Standby Outputs
6.6 Dynamic Loading
6.5 Voltage Regulation
Table 10 Voltage Regulation Limits
Table 11 Optional +5V Regulation Limits
6.8 Ripple / Noise
6.7 Capacitive Loading
Table 13 Capacitive Loading Conditions
Table 14 Ripple and Noise
Table 15 Output Voltage Timing
6.9 Timing Requirements
Figure 4 Output Voltage Timing
EPS1U Power Supply Design Guide
Table 16 Turn On/Off Timing
Tvoutholdup
Tpwokholdup
EPS1U Power Supply Design Guide
Figure 5 Turn On/Off Timing Signal Power Supply
PSON turn on/off cycle
Tsbholdup
7.1 Current Limit
7 Protection Circuits
7.2 240VA Protection
Table 17 Over Current Protection
7.4 Over Temperature Protection
7.3 Over Voltage Protection
Table 19 Over Voltage Limits
Table 20 PSON# Signal Characteristic
8 Control and Indicator Functions
Figure 6 PSON# Signal Characteristics
8.1 PSON#
Table 21 PWOK Signal Characteristics
8.2 PWOK Power OK
8.3 ACWarning
Table 22 ACWarning Signal Characteristics
8.4.1 FRU Data
8.4 Field Replacement Unit FRU Signals
8.4.2 FRU Data Format
8.4.2.1 Product Info Area
Table 25 FRU Device MultiRecord Area
8.4.2.2 MultiRecord Area
EPS1U Power Supply Design Guide
Field Name PS Info
Table 26 LED Indicators
8.5 LED Indicator
9 MTBF
10 Agency Requirements
