Power converter with efficiency calculation
AssigneeZentrum Mikroelektronik Dresden AG
InventorRichard Maria SCHMITZ
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Abstract
A switched power converter includes a power stage. The power stage includes a sensor for sensing an output current to obtain a sensed output current, a sensor for sensing an output voltage to obtain a sensed output voltage, and a sensor for sensing an input voltage to obtain a sensed input voltage. The power converter further includes a look-up table or mathematical relationship implementation for deriving an efficiency measure of the power converter from the sensed input voltage, the sensed output voltage and the sensed output current by relating an energy taken by a load and an energy delivered by the input voltage for a specific period of time.
Claims17
A switched power converter comprising:
- a power stage for generating an output voltage according to a switching signal and an input voltage by means of a switching element, the power stage comprising means for sensing an output current to obtain a sensed output current, means for sensing an output voltage to obtain a sensed output voltage, means for sensing an input voltage to obtain a sensed input voltage;
- the power converter further comprising means for deriving an efficiency measure of the power converter from the sensed input voltage, the sensed output voltage and the sensed output current by relating an energy taken by a load and an energy delivered by the input voltage for a specific period of time.
A method for operating a switched power converter, said method comprising:
- sensing an output current to obtain a sensed output current;
- sensing an output voltage to obtain a sensed output voltage;
- sensing an input voltage to obtain a sensed input voltage;
- deriving an efficiency measure of the power converter from the sensed input voltage, the sensed output voltage and the sensed output current by relating an energy taken by a load and an energy delivered by the input voltage for a specific period of time.
Dependencies are inferred from the claim text.