SSI America ERP2U manual Voltage Regulation, Standby Outputs, Fan operation in standby mode

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SSI

ERP2U Power Supply Design Guide, V2.31

Table 18: 800 W Load Ratings

Voltage

+3.3 V 7

+5 V 7

+12V1

+12V2

+12V3

+12V4

-12 V

+5 VSB

Minimum Continuous

0.8A

0.5A

0 A

0 A

0.9A

0.1A

0 A

0.1A

Maximum Continuous

24A

30A

16A

16A

16A

16A

0.5A

3.0A

Peak

18A

18A

18A

18A

3.5 A

1.Maximum continuous total DC output power should not exceed 800 W.

2.Maximum continuous combined load on +3.3 VDC and +5 VDC outputs shall not exceed 170 W.

3.Maximum Peak total DC output power should not exceed 880 W.

4.Peak power and current loading shall be supported for a minimum of 10 second.

5.Maximum combined current for the 12 V outputs shall be 64 A.

6.Maximum 12V combined peak current shall be 70 A.

7.The 3.3V and 5V may be supply by the module or DC/DC converters powered from +12V in the cage.

6.4.1Standby Outputs

STATUS

Required

The 5 VSB output shall be present when an AC input greater than the power supply turn on voltage is applied.

6.4.2Fan operation in standby mode

STATUS

Required

For standby output at the higher power level, when the supply is in standby mode it is required that the power supply fan(s) remain running at a very low speed. This helps prevent power supply overheating when many systems in the same rack are in standby mode. Running the fan(s) in standby mode also allows better cooling to the standby power converter.

6.5Voltage Regulation

STATUS

Required

The power assembly output voltages must stay within the following voltage limits when operating at steady state and dynamic loading conditions. These limits include the peak-peak ripple/noise specified in Section 5.10. All outputs are measured with reference to the return remote sense (ReturnS) signal. The 5 V, 12V1, 12V2, 12V3, 12V4, –12 V and 5 VSB outputs are measured at the power assembly connectors referenced to ReturnS. The +3.3 V is measured at its remote sense signal (3.3VS) located at the signal connector.

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Contents SSI ERP2U Power Supply Design Guide Disclaimer Contents Tables Error! Bookmark not definedFRU Device Product Information Area Conceptual Overview PurposeRequired Definitions/Terms/AcronymsRequired Optional Mechanical OverviewRecommended Acoustic Sound Power Levels Temperature RequirementsAcoustic Requirements Airflow RequirementsAC Input Voltage Specification AC Inlet ConnectorAC Input Requirements Redundant AC InletsEfficiency Input Under VoltageAC Line Dropout AC Input RatingAC Line Fuse AC Line Transient SpecificationAC Inrush AC Line Sag Transient PerformanceAC Line Fast Transient Specification AC Line Surge Transient PerformanceAC Line Surge Output Connectors DC Output SpecificationRequired Baseboard power connector P1 Baseboard Power ConnectorRequired Peripheral Power Connectors 2 +12V4 Baseboard Power ConnectorRequired Floppy Power Connector Peripheral Power ConnectorsServer Signal Connector Serial ATA Power ConnectorFloppy Power Connector Server Signal ConnectorGrounding Output Power/CurrentsRemote Sense 550 W Load Ratings650 W Load Ratings 600 W Load Ratings750 W Load Ratings 700 W Load RatingsVoltage Regulation Fan operation in standby modeStandby Outputs 800 W Load RatingsCapacitive Loading Dynamic LoadingVoltage Regulation Limits Transient Load RequirementsRipple / Noise Capacitve Loading ConditionsRipple and Noise Hot Swap Requirements RedundancyTiming Requirements Output Voltage TimingDescription Recommended Description Turn On/Off TimingTurn On/Off Timing Current Limit Protection Circuits240VA Protection Over Current ProtectionOver Voltage Protection Over Temperature ProtectionOver Voltage Limits Output VoltagePson # Signal Characteristic Signal Type Control and Indicator FunctionsPwok delay PSON#Power Supply Management Interface Pwok Power OKPwok Signal Characteristics SMBus CommunicationModule FRU Data Module FRU Data Format Field Replacement Unit FRU SignalsProduct Info Area FRU Device InformationLED Indicators MultiRecord AreaField Name PS Info Field Information Definition Power Supply LEDs LED Indicators10Agency Requirements Mtbf

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