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AC load regulation and DC load regulation for SMPS

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gevy

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line regulation of smps

Please explain,
what is AC load regulation and DC load regulation for switching power supply?
What difference between them?
 

VVV

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load regulation and line regulation in smps

Perhaps you are referring to line regulation and load regulation.
In that case, line regulation refers to the percentage change in output voltage for changes in input voltage, at a constant load.

Load regulation refers to the percentage change in output voltage for changes in load current, the input voltage being maintained constant.

Hope this helps.
 

Humungus

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line and load regulation for smps

AC load regulation refers to temporal changes in your load, for example, when there is some block that starts working, your regulator sees a changes of its loads and it makes a certain time to stablis to the new conditions. This translates into variations of the output voltage, overshots, undershots, etc in the meanwhile the regulation loop adapts to the new conditions.

DC load only refers to the quasistatic behavior of your regulator one that the load has settle to a new value. For instance, after a new block has started to operate, the regulator could see the same constant load, after a load change.

So in summary, when load changes, durig the transient, you first see the AC response of the load regulation and once that the load has settle you see the DC response of the load regulation with respect to a given load condition.

See in datasheets both parameters. Normally AC load characteristics are shown in graphics where, for example, the load current is changed from 10mA to 1A and then back to 10mA. The graphics shown the transient response of the output voltage.
 

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