Title:
POWER SUPPLY REVERSE-CONNECTION PROTECTION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2011/155006
Kind Code:
A1
Abstract:
A power supply reverse-connection protection circuit includes a rectifier (12) that is connected to a high potential side terminal (2) of an external DC power supply and to a low potential side terminal (4) thereof. A high potential side node (13) of the rectifier (12) and a low potential side node (14) thereof are connected to a reverse-connection protection control circuit (11). Even in a state of reverse connection of the external DC power supply, the rectifier (12) generates a high potential at the high potential side node (13) and generates a low potential at the low potential side node (14). Therefore, a comparator (15) in the reverse-connection protection control circuit (11) determines the state of reverse connection of the external DC power supply to a power supply terminal (3) and to a ground terminal (5), and a reverse-connection protection element driver circuit (16) causes a reverse-connection protection element (10) to perform an off-action with reliability. As a result, any overcurrent from the ground terminal (5) to the power supply terminal (3) can be precluded with reliability. Thus, the reverse connection of the external DC power supply and the application of a negative surge can be recognized and the occurrence of any overcurrent in an electronic control device can be precluded with reliability.
Inventors:
IIDUKA, Osamu (())
Application Number:
JP2010/005555
Publication Date:
December 15, 2011
Filing Date:
September 10, 2010
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
International Classes:
H02J7/00
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (Osaka-Marubeni Bldg, 5-7Hommachi 2-chome, Chuo-ku, Osaka-sh, Osaka 53, 〒5410053, JP)
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Claims: