Title:
Switching regulator control circuit
Document Type and Number:
Japanese Patent JP5973801
Kind Code:
B2
Abstract:
In the related art, there is a problem that the condition of a load is monitored in an indirect manner so that an efficiency enhancing effect is not obtained. A switching regulator control circuit includes an oscillator for generating a carrier signal and a transistor drive circuit for driving a switching transistor and a synchronous rectification transistor based on a PWM signal generated based on the carrier signal. The oscillator switches the frequency of the carrier signal based on the direction of a source-drain voltage of the synchronous rectification transistor.
Inventors:
Hiroshi Fujiwara
Hirokazu Kawagoe
Kyodai Kosaka
Hirokazu Kawagoe
Kyodai Kosaka
Application Number:
JP2012137477A
Publication Date:
August 23, 2016
Filing Date:
June 19, 2012
Export Citation:
Assignee:
Renesas Electronics Corporation
International Classes:
H02M3/155
Domestic Patent References:
| JP2002281743A | ||||
| JP2007202281A | ||||
| JP2008072786A |
Foreign References:
| US20080094861 |
Attorney, Agent or Firm:
Minoru Kudo
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