Title:
Switching-power-supply control circuit
Document Type and Number:
Japanese Patent JP6196834
Kind Code:
B2
Abstract:
A switching power supply control circuit has a switching element, a smoothing circuit, and a switching control circuit configured to control the switching element. The switching control circuit includes I-V converter configured to multiply an output current flowing into the switching element by a predetermined conversion coefficient and generating an I-V conversion voltage, an amplifier configured to amplify the sum of the I-V conversion voltage and an offset voltage and generating a current detection signal, a first DAC configured to convert a digital compensation value computed from an output voltage of the smoothing circuit to an analog converted value, a first analog comparator configured to compare the current detection signal with the analog converted value and generating a first comparison result signal, and a driver configured to control the switching element on the basis of the first comparison result signal.
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Inventors:
Hoshino Akira
Application Number:
JP2013160601A
Publication Date:
September 13, 2017
Filing Date:
August 01, 2013
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H02M3/155; H02M3/28; H02M1/00
Domestic Patent References:
| JP2005033936A | ||||
| JP2011097778A | ||||
| JP2011166959A | ||||
| JP2008125220A | ||||
| JP2007288942A | ||||
| JP2007209135A | ||||
| JP2002262565A |
Foreign References:
| WO2005078910A1 |
Attorney, Agent or Firm:
Sano patent office
Shizuo Sano
Hideki Hayashida
Shizuo Sano
Hideki Hayashida
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