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Title:
SEMICONDUCTOR DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/141559
Kind Code:
A1
Abstract:
This semiconductor device is provided with: a bootstrap capacitor which is charged over a diode when a low-side switching element is on and which applies said charge voltage to a high-side drive circuit when the low-side switching element is off; an auxiliary bootstrap capacitor which is charged when the low-side switching element is off; a Zener diode which regulates the charge voltage of the auxiliary bootstrap capacitor; and a control circuit which, when the charge voltage of the bootstrap capacitor falls to less than a prescribed voltage while the high-side switching element is on, applies the charge voltage of the auxiliary bootstrap capacitor to the high-side drive circuit over a switch circuit.

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Inventors:
AKAHANE MASASHI (JP)
Application Number:
PCT/JP2017/000049
Publication Date:
August 24, 2017
Filing Date:
January 04, 2017
Export Citation:
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Assignee:
FUJI ELECTRIC CO LTD (JP)
International Classes:
H02M1/08
Foreign References:
US20090160534A12009-06-25
JPH10285949A1998-10-23
JP2003018821A2003-01-17
JPH0541397U1993-06-01
JPH1169842A1999-03-09
JP2005151722A2005-06-09
JP2002330064A2002-11-15
JP2013532945A2013-08-19
Attorney, Agent or Firm:
HOSHINO, Hiroshi (JP)
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