Title:
ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2003/032459
Kind Code:
A1
Abstract:
An electronic apparatus comprises a power source terminal and protection, power source control, and load circuits series connected one after another to the power source terminal. The protection circuit has an overcurrent protection device series−connected to the power source terminal and a short−circuiting circuit installed below the overcurrent protection device to short a power source supplied to the downstream. The overcurrent protection device consist of a resistive device such as a PTC thermistor, and the short−circuiting circuit a Zener diode or a series connection of the Zener diode and a resistor and a semiconductor switching device. The overcurrent protection device speeds up actions to an overcurrent by thermal coupling with the short−circuiting device.
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Inventors:
MORIMOTO KOICHI (JP)
TANAKA HIDEKI (JP)
TANAKA HIDEKI (JP)
Application Number:
PCT/JP2002/010262
Publication Date:
April 17, 2003
Filing Date:
October 02, 2002
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
MORIMOTO KOICHI (JP)
TANAKA HIDEKI (JP)
MORIMOTO KOICHI (JP)
TANAKA HIDEKI (JP)
International Classes:
H02H9/04; H02H11/00; H02H9/02; (IPC1-7): H02H3/087; H02H9/02; H02H9/04
Domestic Patent References:
| WO2000059094A2 | 2000-10-05 | |||
| WO1999039400A1 | 1999-08-05 |
Foreign References:
| JPH0190240U | 1989-06-14 |
Attorney, Agent or Firm:
Iwahashi, Fumio c/o Matsushita Electric Industrial Co. Ltd. (1006, Oaza Kadom, Kadoma-shi Osaka, JP)
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