ATX12V Power Supply Design Guide
Version 2.0
Figures |
| |
Figure 1. Cross Loading Graph for 250W Configuration | 13 | |
Figure 2. Cross Loading Graph for 300W Configuration | 14 | |
Figure 3. Cross Loading Graph for 350W Configuration | 15 | |
Figure 4. Cross Loading Graph for 400W Configuration | 16 | |
Figure 5. | Differential Noise Test Setup | 20 |
Figure 6. Power Supply Timing | 22 | |
Figure 7. | PS_ON# Signal Characteristics | 24 |
Figure 8. Power Supply Dimensions for Chassis That Does Not Require Top Venting | 29 | |
Figure 9. Power Supply Dimensions for Chassis That Require Top Venting | 30 | |
Figure 10. ATX12V Power Supply Connectors | 33 | |
Figure 11. Serial ATA Connector | 36 | |
Tables |
|
|
Table 1. AC Input Line Requirements | 9 | |
Table 2. | DC Output Voltage Regulation | 11 |
Table 3. | Typical Power Distribution for a 250 W ATX12V Configuration | 13 |
Table 4. | Typical Power Distribution for a 300 W ATX12V Configuration | 14 |
Table 5. | Typical Power Distribution for a 350 W ATX12V Configuration | 15 |
Table 6. | Typical Power Distribution for a 400 W ATX12V Configuration | 16 |
Table 7. Minimum Efficiency Vs Load | 17 | |
Table 8. | Loading Table for Efficiency Measurements | 18 |
Table 9. Energy Star Input Power Consumption | 19 | |
Table 10. DC Output Noise/Ripple | 20 | |
Table 11. DC Output Transient Step Sizes | 21 | |
Table 12. | Output Capacitive Loads | 21 |
Table 13. PWR_OK Signal Characteristics | 23 | |
Table 14. | PS_ON# Signal Characteristics | 24 |
Table 15. | Overvoltage Protection | 26 |
Table 16. Harmonic Limits, Class D Equipment | 40 | |
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