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

• US 7,911,769 B2
• Filed: 06/18/2009
• Issued: 03/22/2011
• Est. Priority Date: 10/29/2004
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nakajima, Kazunori, Yamamura, Hideho, Maru, Naoki, Nisisu, Koji, Oomae, Shigeo
• Primary Examiner(s): Levi; Dameon E
• Assistant Examiner(s): NGUYEN, HOA CAO
• Application Number:
  US12/487,279
• Publication Number:
  US 20090257210A1
• Time in Patent Office: 642 Days
• Field of Search: 361/611, 361/775, 361/637, 361/603, 361/620, 361623-628, 361/781, 361/783, 361/715, 361/777, 361/719, 361/807, 361/704, 361/648, 174/70.B, 174/71.B, 174/72.B, 174/68.2 B, 174/88.B, 174/99.B, 257/712, 257/713, 257/719, 257/691, 165/80.3
• 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 power supply device comprising:

a mounting structure for electronic circuits having a plurality of busbars as current paths on a printed circuit board;

a power circuit; and

a control circuit for controlling the power circuit,

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 wide wiring pattern whose width is larger than its length with respect to a direction along which a current flows, and

wherein the wide wiring pattern which connects a pair of adjacently located first and second busbars is arranged in such a manner that its width is larger than its length with respect to a direction along which a current flows from the first busbar to the second busbar.

2. A power supply system comprising:

a mounting structure for electronic circuits having a plurality of busbars as current paths on a printed circuit board; and

a power source for supplying power to the electronic circuits,

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 wide wiring pattern whose width is larger than its length with respect to a direction along which a current flows, and

wherein the wide wiring pattern which connects a pair of adjacently located first and second busbars is arranged in such a manner that its width is larger than its length with respect to a direction along which a current flows from the first busbar to the second busbar.

3. A power supply system comprising:

a mounting structure for electronic circuits having a plurality of busbars as current paths on a printed circuit board;

a power source device including a power circuit and a control circuit for controlling the power circuit; and

a power source for supplying power to the power source device,

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 wide wiring pattern whose width is larger than its length with respect to a direction along which a current flows, and

wherein the wide wiring pattern which connects a pair of adjacently located first and second busbars is arranged in such a manner that it'"'"'s width is larger than its length with respect to a direction along which a current flows from the first busbar to the second busbar.

4. An electric device comprising:

a mounting structure for electronic circuits having a plurality of busbars as current paths on a printed circuit board; and

a power source for supplying power to the electronic circuits,

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 wide wiring pattern whose width is larger than its length with respect to a direction along which a current flows, and

wherein the wide wiring pattern which connects a pair of adjacently located first and second busbars is arranged in such a manner that its width is larger than its length with respect to a direction along which a current flows from the first busbar to the second busbar.

5. An electric device comprising:

a mounting structure for electronic circuits having a plurality of busbars as current paths on a printed circuit board;

a power source device including a power circuit and a control circuit for controlling the power circuit; and

a power source for supplying power to the power source device,

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 wide wiring pattern whose width is larger than its length with respect to a direction along which a current flows, and

wherein the wide wiring pattern which connects a pair of adjacently located first and second busbars is arranged in such a manner that its width is larger than its length with respect to a direction along which a current flows from the first busbar to the second busbar.