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US07974060B2 Overcurrent limitation and output short-circuit protection circuit, voltage regulator using overcurrent limitation and output short-circuit protection circuit, and electronic equipment 有权
过流限流和输出短路保护电路，使用过流限流和输出短路保护电路的电压调节器以及电子设备

  • Patent Title: Overcurrent limitation and output short-circuit protection circuit, voltage regulator using overcurrent limitation and output short-circuit protection circuit, and electronic equipment
  • Patent Title (中): 过流限流和输出短路保护电路，使用过流限流和输出短路保护电路的电压调节器以及电子设备
  • Application No.: US12219525
    Application Date: 2008-07-23
  • Publication No.: US07974060B2
    Publication Date: 2011-07-05
  • Inventor: Koichi Morino
  • Applicant: Koichi Morino
  • Applicant Address: JP Tokyo
  • Assignee: Ricoh Company, Ltd.
  • Current Assignee: Ricoh Company, Ltd.
  • Current Assignee Address: JP Tokyo
  • Agency: Dickstein Shapiro LLP
  • Priority: JP2007-212808 20070817
  • Main IPC: H02H9/08
  • IPC: H02H9/08
Overcurrent limitation and output short-circuit protection circuit, voltage regulator using overcurrent limitation and output short-circuit protection circuit, and electronic equipment
Abstract:
A disclosed overcurrent protection and output short-circuit protection circuit has a proportional output current generation unit and a first current voltage conversion unit provided in series between a first power supply terminal and an output terminal. Furthermore, the overcurrent protection and output short-circuit protection circuit has a control unit that operates based on a difference between a voltage generated at the first current voltage conversion unit and that generated at a second current voltage conversion unit provided between the first power supply terminal and a second power supply terminal. A current flowing to the second current voltage conversion unit is changed by one or more switching elements in a stepwise manner based on the output voltages of the output transistor when supplying the current, thereby changing the voltages generated at both ends of the second current voltage conversion unit.
Abstract(Chinese):

公开的过电流保护和输出短路保护电路具有比例输出电流产生单元和串联设置在第一电源端子和输出端子之间的第一电流电压转换单元。 此外，过电流保护和输出短路保护电路具有控制单元，该控制单元基于在第一电流电压转换单元处产生的电压与在设置在第一电源端子之间的第二电流电压转换单元处产生的电压之间的差异进行操作 和第二电源端子。 流过第二电流电压转换单元的电流在供给电流时基于输出晶体管的输出电压以逐步的方式改变，从而改变在第二电流电压转换的两端产生的电压 单元。

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