SSI America ERP2U manual Timing Requirements, Output Voltage Timing, Description

Page 25

SSI

ERP2U Power Supply Design Guide, V2.31

may be removed, then replaced with a good power supply, however, hot swap needs to work with operational as well as failed power supplies. The newly inserted power supply may get turned on by inserting the supply into the system or by system management recognizing an inserted supply and explicitly turning it on.

6.11 Timing Requirements

STATUS

Required

These are the timing requirements for the power assembly operation. The output voltages must rise from 10% to within regulation limits (Tvout_rise) within 5 to 200ms. The +3.3 V, +5 V and +12 V output voltages should start to rise at about the same time. All outputs must rise monotonically. The +5 V output needs to be greater than the +3.3 V output during any point of the voltage rise. The +5V output must never be greater than the +3.3V output by more than 2.25 V. Each output voltage shall reach regulation within 50 ms (Tvout_on) of each other during turn on of the power supply. Each output voltage shall fall out of regulation within 400 ms (Tvout_off) of each other during turn off. Figure 3 and Figure 4 show the turn ON and turn OFF timing requirements. In Figure 4, the timing is shown with both AC and PSON# controlling the ON/OFF of the power supply.

Table 24: Output Voltage Timing

Item

Description

MIN

Tvout_rise

Output voltage rise time from each main output.

5

 

 

 

Tvout_on

All main outputs must be within regulation of each

 

 

other within this time.

 

 

 

 

Tvout_off

All main outputs must leave regulation within this

 

 

time.

 

Vout

V1

10% Vout

 

V2

V3

V4

Tvout_rise

Tvout_off

Tvout_on

MAX

200

50

400

Units

ms

ms

ms

Figure 3: Output Voltage Timing

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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 Surge Transient Performance AC Line Fast Transient SpecificationAC 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 RequirementsCapacitve Loading Conditions Ripple / NoiseRipple and Noise Hot Swap Requirements RedundancyOutput Voltage Timing Timing RequirementsDescription 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 InformationMultiRecord Area LED IndicatorsField Name PS Info Field Information Definition Power Supply LEDs LED Indicators10Agency Requirements Mtbf

ERP2U specifications

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