ATX12VO (12V Only) Desktop Power Supply
Design Guide
ID
613768
Date
01/03/2022
Public
A newer version of this document is available. Customers should click here to go to the newest version.
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
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)
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)
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)
AC Input – REQUIRED
Table 4-1 lists AC input voltage and frequency requirements for continuous operation. The power supply shall be capable of supplying full-rated output power over two input voltage ranges rated 90-135 VAC and 180-265 VAC rms nominal. The correct input range for use in a given environment may be either switch-selectable or auto-ranging. The power supply shall automatically recover from AC power loss. The power supply must be able to start up under full loading at 90 VAC.
Table 4-1: AC Input Line Requirements
Parameter | Minimum | Nominal1 | Maximum | Unit |
Vin (115 VAC) | 90 | 115 | 135 | VACrms |
Vin (230VAC) | 180 | 230 | 265 | VACrms |
Vin Frequency | 47 | - | 63 | Hz |
- Nominal voltages for test purposes are considered to be within ±1.0 V of nominal.