Converter topologies with multiple windings
AssigneeCompaq Computer Corporation
InventorRichard A. Faulk
Life of this patent
Estimating the term…
Abstract
Converter topologies in which two separate switching transistors and two capacitors are used on the input side. Preferably the two transistors are switched alternately, to alternately pull down different nodes in an inductor-capacitor chain. Two capacitors are interposed in series between an input inductor on the input and a transformer primary winding. Preferably the two transistors are connected with their parasitic diodes in opposite senses, so that one can source current from a first node to ground when off, and the other can sink current from a second node to ground when off.
Claims20
A power converter circuit comprising:
- an input winding operatively connected at a first end thereof to an input power terminal;
- an output winding inductively coupled to said input winding, and operatively connected to provide current at an output terminal;
- an intermediate capacitor and a primary winding, both connected in series with said input winding;
- switch connected to selectably vary the voltage of a node between said input and primary windings;
- and
- secondary winding connected in parallel with said output winding, and inductively coupled to said primary winding but not to said input winding.
A power converter circuit, comprising:
- an input winding operatively connected at a first end thereof to an input power terminal;
- a first intermediate capacitor, a second intermediate capacitor, and a primary winding, all jointly connected in series with said input winding;
- first and second switches connected to selectably vary the voltage of first and second nodes of one of said intermediate capacitors;
- and
- a secondary winding inductively coupled to said primary winding and to said input winding, and operatively connected to provide current at an output terminal.
A circuit, comprising:
- an input winding operatively connected at a first end thereof to an input power terminal;
- an output winding inductively coupled to said input winding, and operatively connected to provide current at an output terminal;
- a first intermediate capacitor, a second intermediate capacitor, and a primary winding, all jointly connected in series with said input winding;
- first and second switches connected to selectably vary the voltage of first and second nodes of one of said intermediate capacitors;
- and
- a secondary winding connected in parallel with said output winding, and inductively coupled to said primary winding but not to said input winding.
Dependencies are inferred from the claim text.