Title:
スイッチ装置
Document Type and Number:
Japanese Patent JP7425173
Kind Code:
B2
Abstract:
An example switch device includes a switching element to connect/disconnect a current path from a power supply terminal to a ground terminal via a load, and an overcurrent protection circuit to limit output current flowing in the switching element to be an overcurrent limit value or less. When an output short circuit of the load is detected, the overcurrent protection circuit decreases the overcurrent limit value to be lower as a power supply voltage is higher. The overcurrent protection circuit includes a reference current generation portion that includes: a differential amplifier portion, an upper side current generation portion arranged to generate a predetermined an upper side current, a lower side current generation portion arranged to generate a lower side current, and a difference current generation portion arranged to output a difference current based on the lower side current and the upper side current, as the reference current.
Inventors:
Toru Takuma
Application Number:
JP2022205776A
Publication Date:
January 30, 2024
Filing Date:
December 22, 2022
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H03K17/00; G05F1/56; G05F1/569; H03K17/082; H03K17/687
Domestic Patent References:
| JP2015027184A | ||||
| JP2012174518A | ||||
| JP2008234588A | ||||
| JP2010119154A | ||||
| JP2009100498A | ||||
| JP10014228A | ||||
| JP2007095848A |
Foreign References:
| WO2011158282A1 | ||||
| US20170085259 |
Attorney, Agent or Firm:
Patent Attorney Corporation Sano Patent Office
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