Intel ATX12V manual Reliability, Component De-rating

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ATX12V Power Supply Design Guide

Version 2.0 Final Review Copy

7. Reliability

7.1. Component De-rating

The de-rating process promotes quality and high reliability. All electronic components should be designed with conservative device de-ratings for use in commercial and industrial environments.

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Contents Version ATX12VImportant Information and Disclaimers Contents Mechanical SafetyEnvironmental Electromagnetic CompatibilityTables FiguresScope IntroductionIncreased +12 VDC output capability Minimum EfficiencyTerminology Main Power ConnectorSeparate current limit for 12V2 on the 2x2 connector Description Applicable DocumentsDocument Title AC Input ElectricalInput Over-current Protection Inrush Current LimitingOther Certifications and/or Declarations Input Under-voltageRegulatory Catastrophic Failure Protection DC OutputDC Voltage Regulation DC Output Voltage RegulationRemote Sensing Typical Power Distribution12V power watts PowerMin Max Current Output AmpsCross Loading Graph for 300W Configuration Typical Power Distribution for a 300 W ATX12V ConfigurationCross Loading Graph for 350W Configuration Typical Power Distribution for a 350 W ATX12V ConfigurationMin Max Peak Current Output Amps Typical Power Distribution for a 400 W ATX12V ConfigurationEfficiency Power Limit / Hazardous Energy LevelsGeneral Minimum Efficiency Vs LoadLoading Table for Efficiency Measurements Other Low Power System Requirements Energy Star Input Power ConsumptionOutput Ripple/Noise Energy StarMax. Ripple & Noise MVpp DC Output Noise/RippleCapacitive Load Output Transient ResponseDC Output Transient Step Sizes Output Capacitive LoadsTiming / Housekeeping / Control 10. +5 VDC / +3.3 VDC Power SequencingClosed-loop Stability Voltage Hold-up TimePSON# Pwrok Signal CharacteristicsPwrok 3. +5 VSB PSON# Signal CharacteristicsReset after Shutdown Power-on Time8. +5 VSB at AC Power-down RisetimeOver-voltage Protection Output ProtectionShort-circuit Protection No-load OperationOutput Bypass Over-temperature ProtectionLabeling / Marking Physical DimensionsMechanical Second optional fan may go in this location Second optional Airflow / Fan DC Connectors AC Connector+12V1 +5V +33V 12V+5V Pin Signal Color ATX Main Power ConnectorPeripheral Connectors 2. +12 V Power ConnectorConnector Molex 39-01-2040 or equivalent Pin Signal AWG WireFloppy Drive Connector Serial ATA Power ConnectorWire Signal Connector AMP 171822-4 or equivalent Pin Signal AWG WireEnvironmental TemperatureThermal Shock Shipping HumidityAcoustics Mechanical ShockRandom Vibration Immunity Electromagnetic CompatibilityEmissions Harmonic Limits, Class D Equipment Input Line Current Harmonic Content and Line FlickerMagnetic Leakage Fields Component De-rating ReliabilityNorth America SafetyProscribed Materials International