Flyback converter with improved response
AssigneeNext Generation Power, Inc.
InventorDavid BARETICH
Life of this patent
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Abstract
A flyback converter is described, configured to operate in a continuous mode with two primary side switches and one secondary side switch, wherein operation contains three switch states; a Primary state wherein both primary side switches are on and current increases in a transformer primary, a Circulate state wherein only one primary switch is on and current circulates in the transformer primary, and a Secondary state wherein both primary switches are off, the secondary side switch is on, and current flows from a transformer secondary into an output of the converter.
Claims20
An electronic circuit comprising:
- a flyback converter configured to operate in a continuous mode, the flyback converter including:
- a coupled inductor having a primary winding and a secondary winding;
- a first switch having a first input terminal, a first output terminal, and a first control terminal, wherein the first input terminal is coupled to a voltage input terminal and the first output terminal is coupled to a first end of the primary winding;
- a second switch having a second input terminal, a second output terminal, and a second control terminal, wherein the second input terminal is coupled to a second end of the primary winding;
- and
- a third switch having a third input terminal, a third output terminal, and a third control terminal, wherein the third input terminal is coupled to a first end of the secondary winding.
The power converter of claim 9, wherein at least one phase of the plurality of phases is always in the secondary state, delivering current to the output.
A continuous-mode flyback converter, comprising:
- a transformer having a primary winding and a secondary winding;
- a first switch having a first input terminal, a first output terminal, and a first control terminal, wherein the first input terminal is coupled to a voltage input terminal and the first output terminal is coupled to a first end of the primary winding;
- a second switch having a second input terminal, a second output terminal, and a second control terminal, wherein the second input terminal is coupled to a second end of the primary winding;
- and
- a third switch having a third input terminal, a third output terminal, and a third control terminal, wherein the third input terminal is coupled to a first end of the secondary winding.
A method for converting a DC input voltage to a DC output voltage, the method comprising:
- transitioning a continuous-mode flyback converter between three different switch states, wherein the flyback converter includes a transformer, two primary side switches, and one secondary side switch, and the three switch states include:
- a primary state wherein the two primary side switches are on and current increases in a primary side of the transformer;
- a circulate state wherein only one of the two primary switches is on and current circulates in the primary of the transformer;
- and
- a secondary state wherein both primary switches are off, the secondary side switch is on, and current flows from a transformer secondary into an output of the converter.
Dependencies are inferred from the claim text.