ATX12VO (12V Only) Desktop Power Supply

Design Guide

ID Date Version Classification
613768 01/03/2022 Public

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Document Table of Contents
Document Table of Contents
Legal Introduction Processor Configurations PCI Express* Add-in Card Considerations Electrical Mechanical Acoustics Environmental Electromagnetic Compatibility Safety Reliability CFX12V Specific Guidelines 2.0 LFX12V Specific Guidelines 2.0 ATX12V Specific Guidelines 3.0 SFX12V Specific Guidelines 4.0 TFX12V Specific Guidelines 3.0 Flex ATX Specific Guidelines 2.0
Legal
Introduction
Introduction Power Supplies and Alternative Low Power Mode System Power Telemetry Feature References Terminology
Power Supplies and Alternative Low Power Mode
System Power Telemetry Feature
References
Terminology
Processor Configurations
Processor Configurations (Recommended) High End Desktop Market Processor Considerations
Processor Configurations (Recommended)
High End Desktop Market Processor Considerations
High End Desktop Market Processor Considerations Modular Power Supply Connectors Overclocking Recommendations
Modular Power Supply Connectors
Overclocking Recommendations
PCI Express* Add-in Card Considerations
PCI Express* Add-in Card Considerations PCIe* Add-in Card Power Excursions PCIe* AIC Auxiliary Power Connectors PCIe* Add-in-Card Auxiliary Power Connectors Sideband Signals
PCIe* Add-in Card Power Excursions
PCIe* Add-in Card Power Excursions PCIe* Add-in-Card and PSU Power Budgets PSU Power Excursion
PCIe* Add-in-Card and PSU Power Budgets
PSU Power Excursion
PCIe* AIC Auxiliary Power Connectors
PCIe* Add-in-Card Auxiliary Power Connectors Sideband Signals
PCIe* Add-in-Card Auxiliary Power Connectors Sideband Signals Sense1 / Sense0 (Required) CARD_PWR_STABLE (Optional) CARD_CBL_PRES# (Optional) Sideband Signals DC Specifications (Required)
Sense1 / Sense0 (Required)
CARD_PWR_STABLE (Optional)
CARD_CBL_PRES# (Optional)
Sideband Signals DC Specifications (Required)
Electrical
Electrical AC Input – REQUIRED DC Output (Required) Timing, Housekeeping, and Control (Required) Reset After Shutdown Output Protection
AC Input – REQUIRED
AC Input – REQUIRED Input Over Current Protection (Required) Inrush Current (Required) Input Under Voltage (Required)
Input Over Current Protection (Required)
Inrush Current (Required)
Input Under Voltage (Required)
DC Output (Required)
DC Output (Required) DC Voltage Regulation (Required) DC Output Current (Required) Remote Sensing (Optional) Other Low Power System Requirements (Required) Output Ripple Noise (Required) Capacitive Load (Recommended) Closed Loop Stability (Required) Multiple 12V Rail Power Sequencing (Required) Voltage Hold-Up Time (Required)
DC Voltage Regulation (Required)
DC Output Current (Required)
Remote Sensing (Optional)
Other Low Power System Requirements (Required)
Output Ripple Noise (Required)
Capacitive Load (Recommended)
Closed Loop Stability (Required)
Multiple 12V Rail Power Sequencing (Required)
Voltage Hold-Up Time (Required)
Timing, Housekeeping, and Control (Required)
Timing, Housekeeping, and Control (Required) PWR_OK (Required) PS_ON# (Required) +12VSB (Required) Power-On Time (Required) Rise Time (Required) Overshoot at Turn-On / Turn-Off (Required) I_PSU% Singal (Required)
PWR_OK (Required)
PS_ON# (Required)
+12VSB (Required)
Power-On Time (Required)
Rise Time (Required)
Overshoot at Turn-On / Turn-Off (Required)
I_PSU% Singal (Required)
Reset After Shutdown
Reset After Shutdown +12VSB at Power-Down (Required) +12VSB Fall Time (Recommended)
+12VSB at Power-Down (Required)
+12VSB Fall Time (Recommended)
Output Protection
Over Voltage Protection (OVP) (Required) Short Circuit Protection (SCP) (Required) No-Load Situation (Required) Over Current Protection (OCP) (Required) Over Temperature Protection (OTP) (Required) Output Bypass (Required) Separate Current Limit for 12V2 (Optional) Overall Power Supply Efficiency Levels Power Supply Efficiency for Energy Regulations - ENERGY STAR* and CEC PC Computers with High Expandability Score (Recommended)
Over Voltage Protection (OVP) (Required)
Short Circuit Protection (SCP) (Required)
No-Load Situation (Required)
Over Current Protection (OCP) (Required)
Over Temperature Protection (OTP) (Required)
Output Bypass (Required)
Separate Current Limit for 12V2 (Optional)
Overall Power Supply Efficiency Levels
Power Supply Efficiency for Energy Regulations - ENERGY STAR* and CEC PC Computers with High Expandability Score (Recommended)
Mechanical
Mechanical Labeling and Marking (Recommended) Connectors (Required) Connector from Motherboard to Storage Devices – Reference Airflow and Fans (Recommended)
Labeling and Marking (Recommended)
Connectors (Required)
AC Connector DC Connectors
AC Connector
DC Connectors
Connector from Motherboard to Storage Devices – Reference
Connector from Motherboard to Storage Devices – Reference Motherboard Connector Serial ATA Connectors (Reference)
Motherboard Connector
Serial ATA Connectors (Reference)
Airflow and Fans (Recommended)
Airflow and Fans (Recommended) Fan Location and Direction Fan Size and Speed Venting
Fan Location and Direction
Fan Size and Speed
Venting
Acoustics
Environmental
Environmental Temperature (Recommended) Thermal Shock (Shipping) Humidity (Recommended) Altitude (Recommended) Mechanical Shock (Recommended) Random Vibration (Recommended)
Temperature (Recommended)
Thermal Shock (Shipping)
Humidity (Recommended)
Altitude (Recommended)
Mechanical Shock (Recommended)
Random Vibration (Recommended)
Electromagnetic Compatibility
Electromagnetic Compatibility Emissions (Required) Immunity (Required) Input Line Current Harmonic Content (Optional) Magnetic Leakage Field (Required) Voltage Fluctuations and Flicker (Required)
Emissions (Required)
Immunity (Required)
Input Line Current Harmonic Content (Optional)
Magnetic Leakage Field (Required)
Voltage Fluctuations and Flicker (Required)
Safety
Safety North America (Required) International (Required) Proscribed Materials (Required) Catastrophic Failure Protection (Recommended)
North America (Required)
International (Required)
Proscribed Materials (Required)
Catastrophic Failure Protection (Recommended)
Reliability
Reliability (Recommended) Reliability – PS_ON# Toggle for S0ix Mode (Required)
Reliability (Recommended)
Reliability – PS_ON# Toggle for S0ix Mode (Required)
CFX12V Specific Guidelines 2.0
CFX12V Specific Guidelines 2.0 Physical Dimensions (Required)
Physical Dimensions (Required)
LFX12V Specific Guidelines 2.0
LFX12V Specific Guidelines 2.0 Physical Dimensions (Required)
Physical Dimensions (Required)
ATX12V Specific Guidelines 3.0
SFX12V Specific Guidelines 4.0
SFX12V Specific Guidelines 4.0 Lower Profile Package – Physical Dimensions (Required) Fan Requirements (Required) Top Fan Mount Package – Physical Dimensions (Required) Fan Requirements (Required) Reduced Depth Top Mount Fan – Physical Dimensions (Required) Fan Requirements (Required) Standard SFX Profile Package – Physical Dimensions (Required) Fan Requirements (Required) PS3 Form Factor – Physical Dimensions (Required) Fan Requirements (Required)
Lower Profile Package – Physical Dimensions (Required)
Fan Requirements (Required)
Top Fan Mount Package – Physical Dimensions (Required)
Fan Requirements (Required)
Reduced Depth Top Mount Fan – Physical Dimensions (Required)
Fan Requirements (Required)
Standard SFX Profile Package – Physical Dimensions (Required)
Fan Requirements (Required)
PS3 Form Factor – Physical Dimensions (Required)
Fan Requirements (Required)
TFX12V Specific Guidelines 3.0
TFX12V Specific Guidelines 3.0 Physical Dimensions (Required) Mounting Options (Recommended) Chassis Requirements (Recommended)
Physical Dimensions (Required)
Mounting Options (Recommended)
Chassis Requirements (Recommended)
Flex ATX Specific Guidelines 2.0
Flex ATX Specific Guidelines 2.0 Physical Dimensions (Required)
Physical Dimensions (Required)

References

The following documents are referenced in various sections of this design guide. For guidelines not specifically mentioned here, refer to the appropriate document.

Document Description

Document Number/Source

IEEE Guide on the Surge Environment in Low-Voltage (1000 V and Less) AC Power Circuits

ANSI C62.41.1-2002

IEEE Guide on Surge Testing for Equipment Connected to Low-Voltage AC Power Circuits

ANSI C62.45-2002

European Association of Consumer Electronics Manufacturers (EACEM*)

Hazardous Substance List / Certification

AB13-94-146

American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz for EMI testing

ANSI C63.4-2014

IEC/UL/CSA 62368-1

IEC/UL/CSA 60950-1

EN 60950-1

EU Low Voltage Directive (2014/35/EU)

GB-4943 (China)

CNS 14336 (Taiwan BSMI)

CISPR32/EN55032 (Electromagnetic compatibility of multimedia equipment - Emission requirements)

EU EMC Directive (2014/30/EU)

CISPR35/EN55035 (Electromagnetic compatibility multimedia equipment Immunity requirements)

FCC Part 15 Class B (Radiated and Conducted Emissions)

PCI Express Card Electromechanical Specification Revision 5.0

PCISIG.com Doc # 15904

PCI Express Card Electromechanical (CEM) Engineering Change Notice (ECN) – “Power Excursion Limits for 300-600w PCIe AICs”

PCISIG.com Doc # 16495

PCI Express Card Electromechanical (CEM) Engineering Change Request (ECR) – “Power Excursion Limits for up to 300 W PCIe AICs”

PCISIG.com Doc # 16680

ENERGY STAR for Computers Version 8.0

https://www.energystar.gov/products/spec/computers_version_8_0_pd

European Union Energy Related Products(ErP) Lot 6

https://ec.europa.eu/energy/en/topics/energy-efficiency/energy-efficient-products/standby

Power Supply Efficiency Labeling Program – 80 plus Organization

80plus.org

Generalized Test Protocol for Calculating the Energy Efficiency of Internal Ac-Dc and Dc-Dc Power Supplies Revision 6.7.1

EPRI – Listed at 80plus.org website

Efficiency (ETA) and Noise (LAMBDA) programs: Cybenetics LTD

Cybenetics.com

Terminology