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AssigneeInfineon Technologies Austria AG
InventorsAnders Lind, Andrey Malinin
Estimating the term…
Circuits and methods are provided for supplying power to a transformer of a switching DC/DC voltage converter within a power converter. The power converter includes separate nodes that can potentially supply such power. A first of these nodes is coupled, typically directly and with no energy-storing bulk capacitor, to a rectifier that supplies rectified power from an alternating current power source. A second node is also supplied power from the rectifier, but is coupled to a bulk capacitor that can store and supply energy as needed. The techniques disclosed herein use the first node to supply power to the transformer when feasible, and use the second node, and its associated bulk capacitor, to supply power otherwise. In so doing, the energy storage requirements of the bulk capacitor may be reduced, meaning that the capacitance and associated size of the bulk capacitor may be reduced relative to other power converter circuits.
A power converter, comprising:
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(canceled)
A method of controlling a power converter that includes a rectifier configured to input alternating current (AC) power from an input power source and supply power to a rectified voltage node having a rectified voltage node, a bulk capacitor that is supplied power from the input power source and has a storage voltage, a transformer comprising a primary-side winding, a first switch configured to provide power to the primary-side winding from the rectified voltage node, and a second switch configured to provide power to the primary-side winding from the bulk capacitor, the method comprising:
14-15. (canceled)
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Dependencies are inferred from the claim text.