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Thread: How do load types differ?

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    Default How do load types differ?

    How do resistive, capacitive, electronic (transistor), and inductive loads vary in their electrical effects, and do they affect their power supply differently? For instance, will loading a +12VDC SMPS with a 5A resistive load cause different performance impacts than a 5A electronic load, than a 5A inductive load?
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    In theory, no effect at all, but a capacitive and inductive load may have small ramp-up times (in the mS) before hitting full load levels. The resistor will go directly to full load, the others are likely to be a little softer during startup, but no difference in the load level after that.

    Edit: This of course depends entirely on the actual circuit design, some capacitive and inductive designs may well be built to go directly to full load as a resistor would.
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    Don't reactive loads skew ripple results due to their frequency response?

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    Yeah.

    That's why the ATX spec says you have to have some capacitance on your load tester.

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