Title:
力率改善回路及びこれを使用したスイッチング電源装置
Document Type and Number:
Japanese Patent JP6946878
Kind Code:
B2
Abstract:
To provide a power factor correction circuit capable of maintaining loop gain properly while maintaining current sensing accuracy even when different AC input voltages are input and a switching power source device using the power factor correction circuit. A power factor correction circuit includes: a power factor correction control circuit including an input voltage detection terminal to which voltage corresponding to input voltage to a boost chopper is input, a current sensing terminal to which voltage corresponding to inductor current in the boost chopper is input, an output voltage detection terminal to which voltage corresponding to output voltage from the boost chopper is input, and an output terminal outputting a drive signal for a switching element; and a voltage adjustment circuit configured to detect the input voltage and adjust voltage at the current sensing terminal and voltage at the input voltage detection terminal according to the detected input voltage.
Inventors:
Masatoshi Sugimoto
Application Number:
JP2017175504A
Publication Date:
October 13, 2021
Filing Date:
September 13, 2017
Export Citation:
Assignee:
Fuji Electric Co., Ltd.
International Classes:
H02M3/155; H02M3/28
Domestic Patent References:
| JP2014010925A | ||||
| JP2012135080A | ||||
| JP2010068688A | ||||
| JP2002359977A | ||||
| JP2002044954A |
Attorney, Agent or Firm:
Ichi Hirose
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