Title:
CURRENT PROTECTION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/083870
Kind Code:
A1
Abstract:
A current protection circuit (11, 24, 34, 44), provided with an MOS transistor (T1, T31), a current detector (8, 42), an off driving unit (9, 23), and a back gate control unit (7, 32). The MOS transistor is serially connected between an input terminal (Pi) for inputting an input voltage and an output terminal (Po) for outputting an output voltage lower than the input voltage. The current detector detects a current flowing between the input terminal and the output terminal and outputs a detection signal representing the direction of the detected current. When a detection signal representing a first direction, which is the direction of a current flowing from the output terminal to the input terminal, is outputted, the off driving unit performs off-driving of the MOS transistor. At least while the detection signal representing the first direction is being outputted from the current detector, the back gate control unit applies the voltage of the drain side of the MOS transistor to the back gate of the MOS transistor.
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Inventors:
HIBI YASUHIRO (JP)
Application Number:
PCT/JP2017/030927
Publication Date:
May 11, 2018
Filing Date:
August 29, 2017
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G05F1/56; H03K17/08
Foreign References:
| JP2008021166A | 2008-01-31 | |||
| JP2016033774A | 2016-03-10 | |||
| JP2015090587A | 2015-05-11 | |||
| JP2015116042A | 2015-06-22 | |||
| JP2009301209A | 2009-12-24 |
Attorney, Agent or Firm:
SATO INTERNATIONAL PATENT FIRM (JP)
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