SSI America ERP2U manual Over Voltage Protection, Over Temperature Protection, Over Voltage Limits

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SSI

ERP2U Power Supply Design Guide, V2.31

7.3Over Voltage Protection

STATUS

Required

The power supply over voltage protection shall be locally sensed in the hot swap modules. The power supply shall shutdown and latch off after an over voltage condition occurs. This latch shall be cleared by toggling the PSON# signal or by an AC power interruption. Table 29 contains the over voltage limits. The values are measured at the output of the power supply’s connectors. The voltage shall never exceed the maximum levels when measured at the power pins of the power supply connector during any single point of fail. The voltage shall never trip any lower than the minimum levels when measured at the power pins of the power supply connector.

Table 28: Over Voltage Limits

Output Voltage

MIN (V)

MAX (V)

+3.3 V

3.9

4.5

 

 

 

+5 V

5.7

6.5

 

 

 

+12V1,+12V2, +12V3, +12V4

13.3

14.5

 

 

 

-12 V

-13.3

-14.5

 

 

 

+5 VSB

5.7

6.5

 

 

 

7.4Over Temperature Protection

STATUS

Recommended

The power supply will be protected against over temperature conditions caused by loss of fan cooling or excessive ambient temperature. In an OTP condition the PSU will shutdown. When the power supply temperature drops to within specified limits, the power supply shall restore power automatically. The OTP circuit must have built in hysteresis such that the power supply will not oscillate on and off due to temperature recovering condition. The OTP trip level shall have a minimum of 4 °C of ambient temperature hysteresis.

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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 AC Line Fast Transient SpecificationAC Line Surge Transient Performance 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 and Noise Ripple / NoiseCapacitve Loading Conditions Hot Swap Requirements RedundancyDescription Timing RequirementsOutput Voltage Timing 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 InformationField Name PS Info Field Information Definition LED IndicatorsMultiRecord Area Power Supply LEDs LED Indicators10Agency Requirements Mtbf

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