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ERP2U Power Supply Design Guide, V1.0
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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