Llc converter with protection circuit
AssigneeInfineon Technologies Austria AG
InventorAndrey Malinin
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Abstract
An LLC (inductor-inductor-capacitor) converter, including: a primary current sensing circuit operable to sense a primary current of the LLC converter; and a protection circuit coupled between the primary current sensing circuit and power switches of the LLC converter, and operable to increase a switching frequency of the LLC converter when an amplitude of the primary current falls below a predefined low current reference value after a predefined blanking time after a phase transition of the LLC converter.
Claims19
An LLC (inductor-inductor-capacitor) converter, comprising:
- a primary current sensing circuit operable to sense a primary current of the LLC converter;
- and
- a protection circuit coupled between the primary current sensing circuit and power switches of the LLC converter, and operable to increase a switching frequency of the LLC converter when an amplitude of the primary current falls below a predefined low current reference value after a predefined blanking time after a phase transition of the LLC converter.
A method of operating an LLC (inductor-inductor-capacitor) converter, comprising:
- sensing, by a primary current sensing circuit, a primary current of the LLC converter;
- and
- increasing, by a protection circuit, a switching frequency of the LLC converter when an amplitude of the primary current falls below a predefined low current reference value after a predefined blanking time following a phase transition of the LLC converter.
Dependencies are inferred from the claim text.