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Input Requirements
A-2 420-Watt Power Supply Requirements
Input Requirements
The following represent the input requirements of the 420-watt power supply:
• Maximum waveform harmonic distortion shall be less than 5%. The
power supply must operate above frequency with both 100~120/200~240
VRMS input voltage ranges.
• The power supply must operate over both voltage ranges with an outside
switch.
The table below shows the 420-watt power supply input requirements.
Table A-1. 420-Watt Power Supply Input Requirements
Input
Frequency
Nominal Frequency Frequency
Variations
50 Hz
60 Hz
47 Hz ~ 53 Hz
57 Hz ~ 63 Hz
Input Voltage Nominal Voltage Variation Range
100 ~ 120 VRMS
200 ~ 240 VRMS
90 ~ 132 VRMS
180 ~ 264 VRMS
Input Current Maximum Input Current Measuring
Range
8 A
4 A
90 ~ 132 VRMS
180 ~ 264 VRMS
Inrush Current The power supply inrush current shall be less than the ratings of
its critical components (including the fuse, rectifiers, and the
surge-limiting device) for all conditions of line voltage.
Efficiency 63% minimum (measuring at maximum load, applying nominal
line)