Dc-dc converter
AssigneeTaiyo Yuden Mobile Technology Co., Ltd.
InventorsYu Yonezawa, Naoyuki Mishima
Life of this patent
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Abstract
The present invention is a DC-DC converter characterized by including a switch element that is provided between one end of a DC power source and one end of a load and turns ON and OFF current input from the DC power source, an inductance element that is provided between one end of the switch element on a load-side end and includes a doughnut-shaped magnetic core and a conductive wire wound around the magnetic core, a commutation switch provided between a node between the switch element and the inductance element and a ground potential, and a capacitance element provided between a node between the inductance element and the load and the ground potential, wherein a magnetic flux density of the magnetic core varies partially.
Claims7
A DC-DC converter comprising:
- a switch element that is provided between one end of a DC power source and one end of a load and turns ON and OFF current input from the DC power source;
- an inductance element that is provided between one end of the switch element on a load-side end and includes a doughnut-shaped magnetic core and a conductive wire wound around the magnetic core;
- a commutation switch provided between a node between the switch element and the inductance element and a ground potential;
- and
- a capacitance element provided between a node between the inductance element and the load and the ground potential,
- wherein a magnetic flux density of the magnetic core varies partially.
A DC-DC converter comprising:
- a switch element that is provided between one end of a DC power source and one end of a load and turns ON and OFF current input from the DC power source;
- an inductance element that is provided between one end of the switch element on a load-side end and includes a doughnut-shaped magnetic core and a conductive wire wound around the magnetic core;
- a commutation switch provided between a node between the switch element and the inductance element and a ground potential;
- and
- a capacitance element provided between a node between the inductance element and the load and the ground potential,
- wherein a cross-sectional area of the magnetic core taken along a plane including a central axis of the magnetic core varies partially.
A DC-DC converter comprising:
- a switch element that is provided between one end of a DC power source and one end of a load and turns ON and OFF current input from the DC power source;
- an inductance element that is provided between one end of the switch element on a load-side end and includes a doughnut-shaped magnetic core and a conductive wire wound around the magnetic core;
- a commutation switch provided between a node between the switch element and the inductance element and a ground potential;
- and
- a capacitance element provided between a node between the inductance element and the load and the ground potential,
- wherein the magnetic core has outer and inner circumferences having different centers.
A DC-DC converter comprising:
- a switch element that is provided between one end of a DC power source and one end of a load and turns ON and OFF current input from the DC power source;
- an inductance element that is provided between one end of the switch element on a load-side end and includes a doughnut-shaped magnetic core and a conductive wire wound around the magnetic core;
- a commutation switch provided between a node between the switch element and the inductance element and a ground potential;
- and
- a capacitance element provided between a node between the inductance element and the load and the ground potential,
- wherein an inductance value of the inductance element decreases within a tolerable range of the current of a switching power supply as the current increases.
Dependencies are inferred from the claim text.