GFK-0356Q Chapter 4 Power Supplies 4-9
4
Input Power/Current Calculation
■ Determine total output load from typical specifications listed for individual modules in
Chapters 2 and 3.
■ Use the graph to determine average input power.
■ Divide the input power by the operating source voltage to determine the input current
requirements.
■ Use the lowest input voltage to determine the maximum input current.
■ Allow for start-up surge current requirements.
■ Allow margins (10% to 20%) for variations.
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