Converter
AssigneeKoninklijke Philips Electronics N. V.
InventorUlrich Boeke
Life of this patent
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Abstract
A converter converts a DC voltage UBat into an output direct voltage Uout, in particular in TV or computer screens. The converter includes a full-bridge circuit for chopping the DC voltage UBar into an AC voltage U˜ on its output and a switching circuit for converting the AC voltage U˜ into the output direct voltage Uout of the converter. The converter further includes a control circuit for generating control signals to drive controllable switching elements in the full-bridge circuit. The output voltage Uout remains stable even during a switching of the full-bridge circuit between two operating modes due to the control circuit only carrying out this switching during a dead time interval ttot, during which at least one of the switching elements is switched off.
Claims13
A converter for conversion of a DC voltage (UBat) into an output direct voltage (Uout) comprising:
- a full-bridge circuit that has controllable switching elements for chopping the DC voltage (UBat) into an AC voltage (U˜) on its output;
- a switching circuit for conversion of the AC voltage (U˜) into the output direct voltage (Uout) of the converter;
- and
- a control circuit for generating control signals to drive the controllable switching elements according to a first converter operating mode or a second converter operating mode;
- wherein a switching between the first converter operating mode and the second converter operating modes takes place according to a reference signal that represents the size of the DC voltage (UBat);
- and
- wherein the control circuit generates the control signals taking into account the output direct voltage (Uout) of the converter;
- and the control circuit carries out the switching between the first converter operating mode and the second converter operating mode only during a dead time interval ttot, during which at least one of the controllable switching elements is switched off.
Dependencies are inferred from the claim text.