Split-boost converter having damped EMI isolation filter and method of operation thereof
AssigneeLucent Technologies Inc.
InventorsMark E. Jacobs, Yimin Jiang
Life of this patent
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Abstract
For use in a split-boost converter having a DC input, first and second outputs, a power train interposed between the DC input and the first and second outputs, a damped electromagnetic interference (EMI) filter circuit and method of reducing the EMI. In one embodiment, the EMI filter circuit includes (1) an EMI filter interposed between the power train and the second output, the EMI filter subject to oscillation from line disturbances arriving at the DC input and (2) a conductive path, coupling a rail of the second output to the DC input, that routes at least a portion of the line disturbances from the DC input directly to the second output to damp the oscillation of the EMI filter.
Claims20
For use in a split-boost converter having a DC input, first and second outputs, a power train interposed between said DC input and said first and second outputs, a damped electromagnetic interference (EMI) filter circuit, comprising:
- an EMI filter interposed between said power train and said second output, said EMI filter subject to oscillation from line disturbances arriving at said DC input;
- and
- a conductive path, coupling a rail of said second output to said DC input, that routes at least a portion of said line disturbances from said DC input directly to said second output to damp said oscillation of said EMI filter.
For use in a split-boost converter having a DC input, first and second outputs, a power train interposed between said DC input and said first and second outputs, a method for reducing electromagnetic interference (EMI), comprising the steps of:
- providing an EMI filter interposed between said power train and said second output, said EMI filter subject to oscillation from line disturbances arriving at said DC input;
- establishing a conductive path between a rail of said second output to said DC input;
- and
- routing at least a portion of said line disturbances from said DC input directly to said second output to damp said oscillation of said EMI filter.
A split-boost converter, comprising:
- a DC input;
- first and second outputs;
- a power train interposed between said DC input and said first and second outputs, said power train including a power inductor;
- an electromagnetic interference (EMI) filter interposed between said power train and said second output, said EMI filter subject to oscillation from line disturbances arriving at said DC input;
- and
- a conductive path, coupling a rail of said second output to a node between said DC input and said power inductor, that routes at least a portion of said line disturbances from said DC input directly to said second output to damp said oscillation of said EMI filter.
Dependencies are inferred from the claim text.