Electronic circuit structure, power supply apparatus, power supply system, and electronic apparatus

• US 20060092599A1
• Filed: 10/28/2005
• Published: 05/04/2006
• Est. Priority Date: 10/29/2004
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nakajima, Kazunori, Yamamura, Hideho, Maru, Naoki, Nisisu, Koji, Oomae, Shigeo
• Granted Patent: US 7,548,411 B2
• Time in Patent Office: Days
• US Class Current: 361/611
• CPC Class Codes: H05K 1/0263 High current adaptations, e.g. printed high current conductors or using auxiliary non-printed means; Fine and coarse circuit patterns on one circuit board H05K1/0293 takes precedence
• CPC Class Codes: H05K 2201/10272 Busbars, i.e. thick metal bars mounted on the PCB as high-current conductors metal strips H05K2201/1028

Abstract

This invention prevents a deterioration of efficiency of a power supply apparatus due to a semiconductor power supply voltage drop, prevents an increase in wasted power, and prevents erroneous operations due to feeder wire voltage drop. In the mounting structure of electronic circuits having a plurality of busbars as current paths on a printed circuit board, the plurality of busbars have almost parallel portions spaced a predetermined distance apart; a span of the parallel portions of the plurality of busbars is greater than the predetermined distance; and in the parallel portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern. In the switching power supply apparatus built on a printed circuit board, with its output voltage of less than 2 V and its output current of more than 100 A, a means is provided for making the power efficiency higher than 70%.

Claims

1. A mounting structure of electronic circuits having a plurality of busbars as current paths on a printed circuit board,

wherein the plurality of busbars have almost parallel portions spaced a predetermined distance apart;

wherein a span of the parallel portions of the plurality of busbars is greater than the predetermined distance;

wherein in the parallel portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern.

2. An electronic circuit mounting structure according to claim 1, wherein in the wiring pattern there is a portion where a first wiring pattern, semiconductor devices and a second wiring pattern are connected in series.

3. A power supply apparatus having an electronic circuit mounting structure, a power circuit and a circuit for controlling the power circuit,

wherein the electronic circuit mounting structure has a plurality of busbars as current paths on a printed circuit board;

wherein the plurality of busbars have almost parallel portions spaced a predetermined distance apart;

wherein a span of the parallel portions of the plurality of busbars is greater than the predetermined distance;

wherein in the parallel portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern.

4. A power supply system having a mounting structure for electronic circuits and a power supply for supplying electricity to the electronic circuits,

wherein the electronic circuit mounting structure has a plurality of busbars as current paths on a printed circuit board;

wherein the plurality of busbars have almost parallel portions spaced a predetermined distance apart;

wherein a span of the parallel portions of the plurality of busbars is greater than the predetermined distance;

wherein in the parallel portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern.

5. A power supply system having a power supply apparatus and a power supply for supplying electricity to the power supply apparatus,

wherein the power supply apparatus has an electronic circuit mounting structure, a power circuit and a circuit for controlling the power circuit;

wherein the electronic circuit mounting structure has a plurality of busbars as current paths on a printed circuit board;

wherein the plurality of busbars have almost parallel portions spaced a predetermined distance apart;

wherein a span of the parallel portions of the plurality of busbars is greater than the predetermined distance;

wherein in the parallel portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern.

6. An electronic apparatus having a mounting structure for electronic circuits and a power supply for supplying electricity to the electronic circuits,

wherein the electronic circuit mounting structure has a plurality of busbars as current paths on a printed circuit board;

wherein the plurality of busbars have almost parallel portions spaced a predetermined distance apart;

wherein a span of the parallel portions of the plurality of busbars is greater than the predetermined distance;

wherein in the parallel portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern.

7. An electronic apparatus having a power supply apparatus and a power supply for supplying electricity to the power supply apparatus,

wherein the power supply apparatus has an electronic circuit mounting structure, a power circuit and a circuit for controlling the power circuit;

wherein the electronic circuit mounting structure has a plurality of busbars as current paths on a printed circuit board;

wherein the plurality of busbars have almost parallel portions spaced a predetermined distance apart;

wherein a span of the parallel portions of the plurality of busbars is greater than the predetermined distance;

wherein in the parallel portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern.

8. A switching power supply apparatus built on a printed circuit board, wherein its output voltage is less than 2 V and its output current is more than 100 A,

the switching power supply apparatus having a means to make a power efficiency higher than 70%.

9. A switching power supply apparatus according to claim 8, wherein the power efficiency is set to higher than 70% by using, in a main current path through which the output current flows, a combination of a plurality of busbars and a wiring pattern connecting the plurality of busbars.

10. A switching power supply apparatus according to claim 9, wherein the wiring pattern connecting the plurality of busbars is a wide wiring pattern whose width is greater than its length with respect to the direction in which a current flows.

11. A switching power supply apparatus according to claim 10,

wherein the plurality of busbars have almost parallel portions spaced a predetermined distance apart;

wherein a span of the parallel, overlapping portions of the plurality of busbars is greater than the predetermined distance;

wherein in the parallel, overlapping portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern.

12. A switching power supply apparatus according to claim 11, wherein the wiring pattern connecting the plurality of busbars is divided for the connection of semiconductor devices.

13. A power supply system having a switching power supply apparatus and a power supply for supplying electricity to the power supply apparatus,

wherein the switching power supply apparatus is built on a printed circuit board, with its output voltage of less than 2 V and its output current of more than 100 A;

wherein the switching power supply apparatus has a means to make a power efficiency higher than 70%.

14. An electronic apparatus having a switching power supply apparatus and a power supply for supplying electricity to the power supply apparatus,

wherein the switching power supply apparatus is built on a printed circuit board, with its output voltage of less than 2 V and its output current of more than 100 A;

wherein the switching power supply apparatus has a means to make a power efficiency higher than 70%.

15. An electronic apparatus having a switching power supply apparatus and a means to make a power efficiency higher than 70%,

wherein the switching power supply apparatus is built on a printed circuit board, with its output voltage of less than 2 V and its output current of more than 100 A.