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Intel ATX12V manual Environmental, Temperature, Thermal Shock Shipping, Humidity, Altitude

Models: ATX12V

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ATX12V Power Supply Design Guide

Version 2.0

5.	Environmental
	The following subsections define recommended environmental specifications and test
	parameters, based on the typical conditions to which an ATX12V power supply may be
	subjected during operation or shipment.
5.1.	Temperature
	Operating ambient	+10 °C to +50 °C
		(At full load, with a maximum temperature rate of change of
		5 °C/10 minutes, but no more than 10 °C/hr.)
	Non-operating ambient	-40 °C to +70 °C
		(Maximum temperature rate of change of 20 °C/hr.)
5.2.	Thermal Shock (Shipping)
	Non-operating	-40 °C to +70 °C
		15 °C/min ≤ dT/dt ≤ 30 °C/min
		Tested for 50 cycles; Duration of exposure to temperature
		extremes for each half cycle shall be 30 minutes.
5.3.	Humidity
	Operating	To 85% relative humidity (non-condensing)
	Non-operating	To 95% relative humidity (non-condensing)
		Note: 95% RH is achieved with a dry bulb temperature of
		55 °C and a wet bulb temperature of 54 °C.
5.4.	Altitude
	Operating	To 10,000 ft
	Non-operating	To 50,000 ft

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Intel ATX12V manual Environmental, Temperature, Thermal Shock Shipping, Humidity, Altitude

Contents

Version ATX12V Power Supply Design GuideIMPORTANT INFORMATION AND DISCLAIMERS Introduction ContentsApplicable Documents Electrical4. Mechanical Safety5. Environmental 6. Electromagnetic CompatibilityFigures ATX12V Power Supply Design Guide VersionTables 1.1. Scope 1. Introduction1.2.1. Increased +12 VDC output capability 1.2.2. Minimum Efficiency1.2.4. Separate current limit for 12V2 on the 2x2 connector 1.2.3. Main Power Connector1.3 Terminology Document Title 2. Applicable DocumentsDescription 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 CAMPATIBILITY3.1.5. Catastrophic Failure Protection 3.2. DC Output3.2.1. DC Voltage Regulation 3.2.2. Remote Sensing 3.2.3. Typical Power DistributionTable 3. Typical Power Distribution for a 250 W ATX12V Configuration 3.2.3.1. ATX12V ConfigurationsFigure 1. Cross Loading Graph for 250W 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 Time3.3.2. PSON# 3.3.1. PWROKTable 13. PWROK Signal Characteristics Table 14. PSON# Signal Characteristics 3.3.3. +5 VSBFigure 7. 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. Mechanical 4.2. Physical Dimensions4.1. Labeling / Marking 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 4.5.3. Peripheral Connectors 4.5.2. +12 V Power ConnectorATX12V Power Supply Design Guide Version 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 ConnectorEnvironmental TemperatureThermal Shock Shipping Humidity5.6. Random Vibration 5.5. Mechanical Shock5.7. Acoustics ATX12V Power Supply Design Guide Version 2.0 Final Review Copy6.1. Emissions 6. Electromagnetic Compatibility6.2. Immunity 6.4. Magnetic Leakage Fields 6.3. Input Line Current Harmonic Content and Line FlickerTable 16. Harmonic Limits, Class D Equipment 7.1. Component De-rating 7. Reliability8.1. North America 8. Safety8.3. Proscribed Materials 8.2. International