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Test Configuration, Hold-Up Time, And Inrush Current

Part 2: Four Cheap 80 PLUS Bronze Power Supplies, Reviewed
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Test Configuration

Test Hardware
AC SourceChroma Programmable AC Source 6530
Power MeterYokogawa WT210 Digital Power Meter
Loads4 x 600 W Chroma 63306 for 12 V testing

4 x 300 W Chroma 63303 for 5 and 3.3 V testing

using Chroma HighSpeed- DC Load Mainframes 6334 
OscilloscopeTektronix DPO3034 Digital Phosphore Oscilloscope (300 MHz)
Test Procedure
Voltages110 and 230 V
Standby Power0.25 A fixed current to simulate PC standby power on 5 Vsb
80 PLUS Efficiency Testing100/50/20% load, relative to specified total output
Load distribution across 12/5/3.3 V rails at the same proportion as specified for 100% testing at 110 V according to ATX 2.3 specification
Efficiency at Fixed Loads25, 50, 85, 300, 500 W loads
Load distribution across 12/5/3.3 V rails at the same proportion as specified for 100%
Peak Load Test110% Overload Testing at maximum combined 12 V
Temperature TestAir intake vs. Outtake temperature delta
tracking highest delta during all tests

More test results for this PSU and others can be found in our Power Supply Charts.

Hold-Up Time and Inrush Current

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