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Patent Searching and Data


Title:
SWITCH DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/193805
Kind Code:
A1
Abstract:
For example, this switch drive device 100 comprises: a driver 30 that drives an N-type semiconductor switch element PT1; a current limiting unit 50 capable of limiting the current supplied to a boot capacitor BC1 included in a bootstrap circuit BTC; and a current control unit 60 that controls the operation of the current limiting unit 50, wherein the current control unit 60, when the charging voltage of the boot capacitor BC1 exceeds a threshold value, drives the current limiting unit 50, and limits the current supplied to the boot capacitor BC1.

Inventors:
HAMA Kenji (C/O ROHM CO. LTD, 21, Saiin Mizosaki-Cho, Ukyo-Ku, Kyoto-Sh, Kyoto 85, 〒6158585, JP)
KOTANI Takahiro (C/O ROHM CO. LTD, 21, Saiin Mizosaki-Cho, Ukyo-Ku, Kyoto-Sh, Kyoto 85, 〒6158585, JP)
Application Number:
JP2019/000814
Publication Date:
October 10, 2019
Filing Date:
January 15, 2019
Export Citation:
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Assignee:
ROHM CO., LTD. (21 Saiin Mizosaki-Cho, Ukyo-Ku Kyoto-Sh, Kyoto 85, 〒6158585, JP)
International Classes:
H03K17/06; H02M1/08; H02M7/48
Foreign References:
JP2016158457A2016-09-01
JP2018007403A2018-01-11
JP2013179821A2013-09-09
JP2014023269A2014-02-03
Attorney, Agent or Firm:
SANO PATENT OFFICE (5F Tenmabashi-Yachiyo Bldg. Bekkan, 2-6 Tenmabashi-Kyomachi, Chuo-Ku, Osaka-Sh, Osaka 32, 〒5400032, JP)
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