SSI
EPS2U Power Supply Design Guide, V2.1
Contents
1
2
3
4
Purpose | 5 |
Conceptual Overview | 5 |
Definitions/Terms/Acronyms | 6 |
Mechanical Overview | 7 |
4.1 | Airflow Requirements | 8 | |
4.2 | Temperature Requirements | 8 | |
5 | AC Input Requirements | 9 | |
5.1 | AC Inlet Connector | 9 | |
5.2 | AC Input Voltage Specification | 9 | |
5.3 | Efficiency | 9 | |
5.4 | AC Line Dropout | 10 | |
5.5 | AC Line Fuse | 10 | |
5.6 | AC Inrush | 10 | |
5.7 | AC Line Transient Specification | 10 | |
5.8 | AC Line Fast Transient Specification | 11 | |
6 | DC Output Specification | 12 | |
6.1 | Output Connectors | 12 | |
6.1.1 | 12V Power Rail Configurations | 12 | |
6.1.2 | Baseboard power connector | 13 | |
6.1.3 | Processor Power Connector | 14 | |
6.1.4 | Peripheral Power Connectors | 15 | |
6.1.5 | Floppy Power Connector | 15 | |
6.1.6 | Server Signal Connector | 15 | |
6.2 | Grounding | 16 | |
6.3 | Remote Sense | 16 | |
6.4 | Output Power/Currents | 17 | |
6.4.1 | Standby Outputs | 18 | |
6.5 | Voltage Regulation | 19 | |
6.6 | Dynamic Loading | 20 | |
6.7 | Capacitive Loading | 20 | |
6.8 | Ripple / Noise | 21 | |
6.9 | 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 | |
8.2 | PWOK (Power OK) | 27 | |
8.3 | Field Replacement Unit (FRU) Signals | 27 | |
8.3.1 | FRU Data | 27 |
8.3.2 | FRU Data Format | 28 |
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