ATX12V Power Supply Design Guide
Version 2.0
4
3.4.3. No-load Operation .....................................................................................................26
3.4.4. Over-current Protection .............................................................................................26
3.4.5. Over-temperature Protection .....................................................................................27
3.4.6. Output Bypass ...........................................................................................................27
4. Mechanical......................................................................................................... 28
4.1. Labeling / Marking ..................................................................................................................28
4.2. Physical Dimensions ..............................................................................................................28
4.3. Airflow / Fan............................................................................................................................31
4.4. AC Connector .........................................................................................................................32
4.5. DC Connectors .......................................................................................................................32
4.5.1. ATX Main Power Connector ......................................................................................34
4.5.2. +12 V Power Connector.............................................................................................35
4.5.3. Peripheral Connector(s).............................................................................................35
4.5.4. Serial ATA Power Connector.....................................................................................36
4.5.5. Floppy Drive Connector .............................................................................................36
5. Environmental ................................................................................................... 37
5.1. Temperature...........................................................................................................................37
5.2. Thermal Shock (Shipping)......................................................................................................37
5.3. Humidity..................................................................................................................................37
5.4. Altitude....................................................................................................................................37
5.5. Mechanical Shock ..................................................................................................................38
5.6. Random Vibration...................................................................................................................38
5.7. Acoustics ................................................................................................................................38
6. Electromagnetic Compatibility......................................................................... 39
6.1. Emissions ...............................................................................................................................39
6.2. Immunity...................................................................................................................................39
6.3. Input Line Current Harmonic Content and Line Flicker ..........................................................40
6.4. Magnetic Leakage Fields........................................................................................................40
7. Reliability ........................................................................................................... 41
7.1. Component De-rating .............................................................................................................41
8. Safety ................................................................................................................. 42
8.1. North America ........................................................................................................................42
8.2. International............................................................................................................................43
8.3. Proscribed Materials...............................................................................................................43
