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In Reply to: RE: Speaking of Linear Power Supplies.... posted by AbeCollins on December 17, 2014 at 16:19:21
I guess you could call it that. its usually characterized as the voltagedroop at some load that is a step response, both load on and load off.
Ihave only seen it characterized in regulators, never a supply.
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The transient response value for my Lab power supply is 50uS based on typical industry step response test from half load to full scale load. Of course this test cannot represent the varied digital switching current demands in a computer but it is at least specified. I am not aware of a comprehensive test that would cover it.
Transient response is not specified at all for many 'audiophile' power supplies. Transient response for the TeraDak and HDPlex are not specified.
Ripple noise voltage if specified at all is often done without mentioning the frequency range over which the noise is measured, or it is published for a narrow frequency range where the power supply performed at it's best.
My Lab power supply has a ripple spec of less than 1mV RMS from 20Hz - 20MHz.... and it's not considered a 'high-end' lab power supply.
That does not tell me how much the voltage will droop, and this probably depends on the voltage.
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