SSI
EPS1U Power Supply Design Guide, V1.1
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 3: AC Input Rating
Parameter | MIN | Rated | MAX | MAX Input | MAX Input | MAX Input | MAX Rated Input | |
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| Current | Current | Current | Current |
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| (125W) | (250W) | (350W) | (125W/250W/350W) | |
Voltage (110) | 90 Vrms | 140 Vrms | 1,3 | 1,3 | 1,3 | 2.2 / 3.8 | 4 | |
2.4 Arms | 4.2 Arms | 5.9 Arms | / 5.3Arms | |||||
Voltage (220) | 180 Vrms | 264 Vrms | 2,3 | 2,3 | 2,3 | 1.1 / 1.9 | 4 | |
1.2 Arms | 2.1 Arms | 3.0 Arms | / 2.7 Arms | |||||
Frequency | 47 Hz |
| 63 Hz |
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1.Maximum input current at low input voltage range shall be measured at 90VAC. A 125W output load shall be applied to the 125W version, a 250 W output load shall be applied for the 250 W version and a 350 W output load shall be applied to the 350 W version.
2.Maximum input current at high input voltage range shall be measured at 180 VAC. A 125W output load shall be applied to the 125W version, a 250 W output load shall be applied for the 250 W version and a 350 W output load shall be applied to the 350 W version.
3.This is not to be used for determining agency input current markings.
4.Maximum rated input current is measured at 100 VAC and 200 VAC.
5.3Input Under Voltage
STATUS
Required
The power supply shall contain protection circuitry such that application of an input voltage below the minimum specified in section 5.2 shall not cause damage to the power supply.
