Voltage Sensing in a Voltage Converter
AssigneeInfineon Technologies AG
InventorMartin Feldtkeller
Life of this patent
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Abstract
A method for sensing an output voltage in a voltage converter includes at least one switching element and a transformer. A voltage is sampled across an auxiliary winding or a signal obtained from the voltage across an auxiliary winding in order to obtain a plurality of samples after the at least one switching element has assumed a first operation state and until the auxiliary voltage reaches a predefined threshold. The auxiliary winding is inductively coupled with the transformer. At least one sample obtained is evaluated before the auxiliary voltage reaches the predefined threshold.
Claims24
A method for sensing an output voltage in a voltage converter that comprises a switching element and a transformer, the method comprising:
- sampling a voltage across an auxiliary winding or a signal obtained from the voltage across an auxiliary winding in order to obtain a plurality of samples after the switching element has assumed a first operation state and until the auxiliary voltage reaches a predefined threshold, wherein the auxiliary winding is inductively coupled with the transformer;
- and
- evaluating at least one sample obtained before the auxiliary voltage reaches the predefined threshold.
A voltage converter comprising:
- a switching element;
- a transformer;
- an auxiliary winding inductively coupled with the transformer;
- and
- a sensing circuit coupled to the transformer and configured to obtain a plurality of samples after the switching element has assumed a first operation state and until a voltage across the auxiliary winding reaches a predefined threshold, and to evaluate at least one sample obtained before the voltage across the auxiliary winding reaches the predefined threshold.
Dependencies are inferred from the claim text.