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Intel ATX12V manual Reliability, Component De-rating

Models: ATX12V

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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.

Page 41

Image 41

Intel ATX12V manual Reliability, Component De-rating

Contents

Version ATX12V Power Supply Design GuideIMPORTANT INFORMATION AND DISCLAIMERS Introduction ContentsApplicable Documents Electrical4. Mechanical Safety5. Environmental 6. Electromagnetic CompatibilityTables ATX12V Power Supply Design Guide VersionFigures 1.1. Scope 1. Introduction1.2.1. Increased +12 VDC output capability 1.2.2. Minimum Efficiency1.3 Terminology 1.2.3. Main Power Connector1.2.4. Separate current limit for 12V2 on the 2x2 connector Description 2. Applicable DocumentsDocument Title 3.1. AC Input 3. Electrical3.1.1. Input Over-current Protection 3.1.2. Inrush Current Limiting3.1.4. Regulatory 3.1.3. Input Under-voltagePRODUCT SAFETY ELECTROMAGNETIC CAMPATIBILITY3.2.1. DC Voltage Regulation 3.2. DC Output3.1.5. Catastrophic Failure Protection 3.2.2. Remote Sensing 3.2.3. Typical Power DistributionFigure 1. Cross Loading Graph for 250W Configuration 3.2.3.1. ATX12V ConfigurationsTable 3. Typical Power Distribution for a 250 W ATX12V Configuration Figure 2. Cross Loading Graph for 300W Configuration Table 4. Typical Power Distribution for a 300 W ATX12V ConfigurationFigure 3. Cross Loading Graph for 350W Configuration Table 5. Typical Power Distribution for a 350 W ATX12V ConfigurationFigure 4. Cross Loading Graph for 400W Configuration Table 6. Typical Power Distribution for a 400 W ATX12V Configuration3.2.5. Efficiency 3.2.4. Power Limit / Hazardous Energy Levels3.2.5.1. General Table 7. Minimum Efficiency Vs LoadTable 8. Loading Table for Efficiency Measurements ATX12V Power Supply Design GuideTable 9. Energy Star Input Power Consumption 3.2.6. Output Ripple/Noise3.2.5.3. Other Low Power System Requirements 3.2.5.2. Energy StarPower Supply Figure 5. Differential Noise Test SetupTable 10. DC Output Noise/Ripple Scope3.2.8. Capacitive Load 3.2.7. Output Transient ResponseTable 11. DC Output Transient Step Sizes Table 12. Output Capacitive Loads3.3. Timing / Housekeeping / Control 3.2.10. +5 VDC / +3.3 VDC Power Sequencing3.2.9. Closed-loop Stability 3.2.11. Voltage Hold-up TimeTable 13. PWROK Signal Characteristics 3.3.1. PWROK3.3.2. PSON# Figure 7. PSON# Signal Characteristics 3.3.3. +5 VSBTable 14. PSON# Signal Characteristics 3.3.7. Reset after Shutdown 3.3.4. Power-on Time3.3.8. +5 VSB at AC Power-down 3.3.5. Risetime3.4.1. Over-voltage Protection 3.4. Output Protection3.4.2. Short-circuit Protection 3.4.3. No-load Operation3.4.6. Output Bypass 3.4.5. Over-temperature Protection4.1. Labeling / Marking 4.2. Physical Dimensions4. Mechanical Air inlet grill, 55% open area Second optional fan may go in this locationfan may be located Second optionalin optional venting area or on topside4.3. Airflow / Fan 4.5. DC Connectors 4.4. AC ConnectorPSON# Main Power Connector4.5.1. ATX Main Power Connector ATX12V Power Supply Design Guide Version 4.5.2. +12 V Power Connector4.5.3. Peripheral Connectors 4.5.5. Floppy Drive Connector 4.5.4. Serial ATA Power ConnectorThis is a required connector for systems with Serial ATA devices Figure 11. Serial ATA ConnectorTemperature EnvironmentalThermal Shock Shipping Humidity5.6. Random Vibration 5.5. Mechanical Shock5.7. Acoustics ATX12V Power Supply Design Guide Version 2.0 Final Review Copy6.2. Immunity 6. Electromagnetic Compatibility6.1. Emissions Table 16. Harmonic Limits, Class D Equipment 6.3. Input Line Current Harmonic Content and Line Flicker6.4. Magnetic Leakage Fields 7.1. Component De-rating 7. Reliability8.1. North America 8. Safety8.3. Proscribed Materials 8.2. International