US 9,178,422 B2 · Resonance-based single inductor output-driven DC-DC converter and method

Abstract

A resonance-based DC-DC converter for converting a DC input voltage to a first DC output voltage (VOUT1) on a output conductor (9) includes an inductor (L) having a first terminal connected to a source (2) of a DC input voltage (VIN) and a second terminal coupled to a first conductor (4) and a capacitor (CRES) having a first terminal coupled to the first conductor. A first switch (SW1) is coupled between the resonance conductor and the output conductor to conduct inductor current (IL) into the output conductor during a first phase (Phase1). A second switch (SW2) is coupled between a second terminal of the capacitor and the output conductor to conduct inductor current through the capacitor into the output conductor (9) during a second phase (Phase2). A third switch (SW3) is coupled between the second terminal (31) of the capacitor and a first reference voltage (GND) to conduct inductor current from a source of the first reference voltage through the capacitor to the input voltage (VIN) during a third phase (Phase3).

Claims21

Dependent claims

A resonance-based DC-DC converter for converting a DC input voltage to a first DC output voltage on a first output conductor, comprising:

(a) an inductor having a first terminal directly coupled to a source of a DC input voltage and a second terminal coupled to a resonance conductor;
(b) a resonance capacitor having a first terminal coupled to the resonance conductor;
(c) a first switch coupled between the resonance conductor and the first output conductor, for conducting inductor current into the first output conductor during a first phase;
(d) a second switch coupled between a second terminal of the resonance capacitor and the first output conductor, for conducting inductor current through the resonance capacitor into the first output conductor during a second phase;
and
(e) a third switch coupled between the second terminal of the resonance capacitor and a first reference voltage for conducting inductor current from a source of the first reference voltage through the resonance capacitor into the source of the input voltage during a third phase.

3 more elements

A method for converting a DC input voltage to a DC output voltage on an output conductor by means of a resonance-based DC-DC converter, the method comprising:

(a) coupling a first terminal of an inductor directly to a source of the DC input voltage, coupling a second terminal of the inductor to a resonance conductor, and coupling a first terminal of a resonance capacitor to the resonance conductor;
(b) conducting inductor current from the resonance conductor through a first switch into the output conductor during a first phase;
(c) conducting inductor current through the resonance capacitor and a second switch and into the output conductor during a second phase;
and
(d) conducting inductor current from a source of a first reference voltage through a third switch, through the resonance capacitor, and through the inductor into the source of the input voltage during a third phase.

2 more elements

Dependencies are inferred from the claim text.

Resonance-based single inductor output-driven DC-DC converter and method

Life of this patent

Resonance-based single inductor output-driven DC-DC converter and method

Life of this patent

Abstract

Claims21