US 2024/0204676 A1Published application

Converter circuit with half-bridge current-doubler rectifier and integrated magnetics

AssigneeMonolithic Power Systems, Inc.

InventorDianbo FU

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Abstract

A novel converter circuit topology is disclosed. The converter circuit has a bridge circuit, a transformer, and a half-bridge current-doubler rectifier. An input end of the bridge circuit is connected to an input voltage node of the converter circuit. A reference end of the bridge circuit is connected to an output voltage node of the converter circuit. Opposing ends of a primary winding of the transformer are connected to bridge nodes of the bridge circuit. A secondary winding of the transformer serves as current-doubler inductors of the half-bridge current-doubler rectifier. A tap of the secondary winding is connected to the reference end of the bridge circuit.

Claims13

Dependent claims

A converter circuit comprising:

a bridge circuit that is connected between an input voltage node of the converter circuit and an output voltage node of the converter circuit, the bridge circuit having a first bridge node, a second bridge node, an input end that is connected to the input voltage node, and a reference end that is connected to the output voltage node;
a transformer comprising a primary winding and a secondary winding, the secondary winding having a first portion and a second portion, the primary winding having a first end that is connected to the first bridge node and a second end that is connected to the second bridge node, a tap between the first and the second portions of the secondary winding being connected to the reference end of the bridge circuit;
and
a half-bridge current-doubler rectifier comprising the first portion of the secondary winding as a first inductor and the second portion of the secondary winding as a second inductor.

1 more element

A converter circuit comprising:

an input voltage node, a reference node, and an output voltage node, an input voltage to the converter circuit being across the input voltage node and the reference node, an output voltage generated by the converter circuit being across the output voltage node and the reference node;
a transformer comprising a primary winding and a secondary winding, the secondary winding comprising a first portion and a second portion, a center tap of the secondary winding being between the first and second portions of the secondary winding;
a bridge circuit having an input end that is connected to the input voltage node, a reference end that is connected to the output voltage node, a first bridge node that is connected to a first end of the primary winding, and a second bridge node that is connected to a second end of the primary winding, the center tap of the secondary winding being connected to the reference end of the bridge circuit;
and
a half-bridge current-doubler rectifier comprising the secondary winding, a first switch comprising a first terminal that is connected to a first end of the secondary winding and a second terminal that is connected to the reference node of the converter circuit, and a second switch comprising a first terminal that is connected to a second end of the secondary winding and a second terminal that is connected to the reference node of the converter circuit, the first and second ends of the secondary winding being opposing ends of the secondary winding.

2 more elements

A converter circuit comprising:

a transformer comprising a primary winding and a secondary winding, the secondary winding comprising a first portion and a second portion, a center tap of the secondary winding being between the first and second portions of the secondary winding, the center tap of the secondary winding being connected to an output voltage node of the converter circuit;
a first switch comprising a first terminal that is connected to an input voltage node of the converter circuit and a second terminal that is connected to a first bridge node, the first bridge node being connected to a first end of the primary winding;
a second switch comprising a first terminal that is connected to the first bridge node and a second terminal that is connected to the center tap of the secondary winding;
a third switch comprising a first terminal that is connected to the input voltage node and a second terminal that is connected to a second bridge node, the second bridge node being connected to a second end of the primary winding;
a fourth switch comprising a first terminal that is connected to the second bridge node and a second terminal that is connected to the center tap of the secondary winding;
a fifth switch comprising a first terminal that is connected to a first end of the secondary winding and a second terminal that is connected to a reference node of the converter circuit;
and
a sixth switch that forms a half-bridge current-doubler rectifier with the fifth switch and the secondary winding of the transformer, the sixth switch comprising a first terminal that is connected to a second end of the secondary winding and a second terminal that is connected to the reference node of the converter circuit, the first and second ends of the secondary winding being opposing ends of the secondary winding.

5 more elements

Dependencies are inferred from the claim text.