Title:
負荷駆動装置
Document Type and Number:
Japanese Patent JP4267865
Kind Code:
B2
Abstract:
An electrical load driving circuit is provided which includes an insulated gate transistor and a control voltage limiting circuit. The transistor works to supply the power to an electrical load selectively. The control voltage limiting circuit includes a control circuit and a switching circuit. The control circuit works to limit a voltage applied to the transistor selectively to one of a higher controlled voltage and a lower controlled voltage. The switching circuit is disposed across the transistor and closed selectively to limit the voltage applied to the transistor to the second controlled voltage through the control circuit when it is determined that an overcurrent has occurred which flows through the transistor.
Inventors:
Masahiro Tsuchida
Application Number:
JP2002117655A
Publication Date:
May 27, 2009
Filing Date:
April 19, 2002
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H02H3/087; H03K17/08; H02H3/093; H02M3/00; H03K17/082; H03K17/687
Domestic Patent References:
| JP2001320264A | ||||
| JP4824223A | ||||
| JP54150847U | ||||
| JP2155467A |
Attorney, Agent or Firm:
Tsuyoshi Sato