DC-DC Converter Apparatus

Patent metadata

Field	Value
Publication number	US-2016248333-A1
Application number	US-201415027388-A
Country	US
Kind code	A1
Filing date	Oct 1, 2014
Priority date	Oct 7, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

To achieve reduction in size and reduction in cost of a DC-DC converter apparatus. Rectifier elements and are installed onto a metal base, and a drive circuit board is installed to an upper part of the rectifier element. Each terminal of the rectifier elements and is soldered to the drive circuit board. Three terminals of the rectifier elements are soldered, respectively, to a drive signal wiring pattern, a high-potential-side main current wiring pattern, and a low-potential-side main current wiring pattern of the board. A pair of output terminals of a transformer is connected to at least the pair of high-potential-side main current wiring patterns using high-potential-side metal conductors.

First claim

1 .- 8 . (canceled)

9 . A DC-DC converter apparatus comprising:
a metal base; a transformer which performs power conversion; a rectifier element which controls input and output current of the transformer; and a drive circuit board to which a drive circuit to drive the rectifier element is mounted, wherein the rectifier element is arranged on the metal base to be capable of heat conduction, and the drive circuit board is arranged to have a predetermined interval with respect to the metal base.

10 . The DC-DC converter apparatus according to claim 9 , wherein
the drive circuit board is arranged at a position lower than a maximum height of the transformer.

11 . The DC-DC converter apparatus according to claim 9 , further comprising:
a high-voltage circuit which includes a plurality of switching elements, and is connected to a primary side of the transformer; a low-voltage circuit which includes the rectifier element, and is connected to a secondary side of the transformer; and a high-potential-side metal conductor which connects an output terminal on the secondary side of the transformer and a high-potential-side terminal of the rectifier element, wherein a drive signal wiring pattern configured to supply a drive signal to a drive signal terminal of the rectifier element, a high-potential-side main current wiring pattern configured to supply a main current to the high-potential-side terminal of the rectifier element, and a low-potential-side main current wiring pattern configured to supply the main current to a low-potential-side terminal of the rectifier element are formed in the drive circuit board, the output terminal of the secondary side of the transformer is connected to one end of the high-potential-side metal conductor, other end of the high-potential-side metal conductor is connected to the high-potential-side main current wiring pattern, and the high-potential-side main current wiring pattern is connected to the high-potential-side terminal of the rectifier element.

12 . The DC-DC converter apparatus according to claim 11 , wherein
the drive circuit board is arranged at a position lower than a maximum height of the transformer.

13 . The DC-DC converter apparatus according to claim 11 , wherein
one end of the high-potential-side metal conductor is integrated with a base portion by resin molding.

14 . The DC-DC converter apparatus according to claim 11 , wherein
the low-potential-side terminal of the rectifier elements is connected to the low-potential main current wiring pattern formed in the drive circuit board, other end of the low-potential-side metal conductor is connected to the low-potential-side main current wiring pattern, and one end of the low-potential-side metal conductor is fixed to the metal base having a ground potential.

15 . The DC-DC converter apparatus according to claim 14 , wherein
one end of the low-potential-side metal conductor is integrated with a base portion by resin molding.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Nakazawa Tatsuya
• Sobu Yuji
• Shinohara Hidenori
• Yamashita Yoshiharu

Classifications

• B60L1/00

  Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00) · CPC title

• H05K7/2039

  characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00) · CPC title

• H02M1/32

  Means for protecting converters other than automatic disconnection · CPC title

• H02M3/33592

  having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer · CPC title

• B60L2210/12

  Buck converters · CPC title