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power envelope

The power envelope is a characteristic value of power supplies. It is a characteristic curve that shows the relationship between the current that can be drawn at a certain output voltage. Such power envelopes can be rectangular, but also show a linear or hyperbolic relationship of the two output quantities voltage and current.

Rectangular power envelopes have a nonlinear relationship between output current and voltage: as the output current increases, the output voltage remains constant up to the maximum current. In a power envelope consisting of several rectangles, the current remains constant up to a first maximum current, after which it drops to a second voltage value, which it maintains until the second, lower maximum current.

Rectangular power envelope curves

Rectangular power envelope curves

It is different with a linear relationship between voltage and current, where the power curve shows a continuous relationship between current and voltage. At high voltage, only a certain current can be drawn, and this current increases continuously as the voltage drops. The relationship between voltage and current is therefore inverse. The power curve has a maximum voltage value and a maximum current value.

Englisch: power envelope
Updated at: 11.03.2012
#Words: 183
Links: power (P), envelope, current, voltage, constant
Translations: DE

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