Multiple output voltage converter with improved cross-regulation

Details Multiple output voltage converter with improved cross-regulation Multiple output voltage converter with improved cross-regulation

1998-12-04

2000-06-06

Riley, Shawn

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

307 28, H02M 542

Patent

active

060727098

ABSTRACT:
A voltage converter for converting an input voltage into at least a first high output voltage and a second lower output voltage. An input resonant circuit includes a transformer primary winding. At least first and second output circuits, each of which includes a respective secondary winding or a part of a secondary winding of the transformer and which supply the first and second output voltages. The second output circuit includes a rectifier arrangement supplying a DC output voltage. To improve the synchronism of the output voltages, i.e. reduce the cross-regulation, an additional capacitance is connected parallel to the secondary winding of the second output circuit and is dimensioned such that its capacitance, transformed to the primary winding essentially corresponds to the capacitance, transformed to the primary winding, of a parallel capacitance of the secondary winding of the first output circuit. Alternatively, a subsidiary circuit can be added to the second output circuit comprising an additional transformer secondary winding with an additional capacitor and an additional rectifier arrangement in a series circuit arranged parallel to a branch of the rectifier arrangement and to a load connected thereto.

REFERENCES:
patent: 5737203 (1998-04-01), Barrett

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