SSI
EPS2U Power Supply Design Guide, V2.1
5AC Input Requirements
STATUS
Required
The power supply shall incorporate universal power input with active power factor correction, which shall reduce line harmonics in accordance with the
5.1AC Inlet Connector
STATUS
Required
The AC input connector shall be an IEC 320
5.2AC Input Voltage Specification
STATUS
Required
The power supply must operate within all specified limits over the following input voltage range. Harmonic distortion of up to 10% THD must not cause the power supply to go out of specified limits. The power supply shall operate properly at 85 VAC input voltage to guarantee proper design margins.
Table 2: AC Input Rating
5.3Efficiency
STATUS
Recommended
PARAMETER | MIN | RATED | MAX | |
Voltage (110) | 90 | Vrms | 140 Vrms | |
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Voltage (220) | 180 Vrms | 264 Vrms | ||
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Frequency | 47 | Hz |
| 63 Hz |
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The following efficiency requirements are provided as a recommendation to allow for proper power supply cooling when installed in a system.
Table 3: Efficiency
Power Level | Efficiency | Airflow (reference) |
480W | 68% | 20 CFM |
550W | 68% | 20 CFM |
600W | 72% | 20 CFM |
650W | 72% | 20 CFM |
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