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Patent Searching and Data


Title:
SEMICONDUCTOR SWITCH CONTROL CIRCUIT AND SWITCHING POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/176077
Kind Code:
A1
Abstract:
A semiconductor switch control circuit 12 according to the present invention comprises: a pulse signal generator 13 that generates a pulse signal serving as a time reference for performance of on/off control of a semiconductor switch 6; a drive current generator 14 that, on the basis of the pulse signal generated by the pulse signal generator 13, generates a drive current and supplies said drive current to a gate electrode of the semiconductor switch 6; a current detector 18 that detects a drain current, a source current and the like of the semiconductor switch 6; and a drive current controller 19 that has a function for controlling the drive current generated by the drive current generator 14 on the basis of the pulse signal generated by the pulse signal generator 13 and the current detected by the current detector 18. Even at a timing at which a large switching current flows, such as if a power supply starts or overloads, this semiconductor switch control circuit is less susceptible to the occurrence of self-induced oscillation and resulting malfunctioning of the semiconductor switch, which would damage the semiconductor switch and circuit components proximal thereto.

Inventors:
MIYAZAWA WATARU (JP)
HISADA SHIGERU (JP)
Application Number:
JP2018/010355
Publication Date:
September 19, 2019
Filing Date:
March 16, 2018
Export Citation:
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Assignee:
SHINDENGEN ELECTRIC MFG (JP)
International Classes:
H02M1/08; H02M3/155; H03K17/16
Foreign References:
JP2001078435A2001-03-23
JP2014171354A2014-09-18
JP2009022106A2009-01-29
Attorney, Agent or Firm:
MATSUO, Nobutaka (JP)
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