Title:
スイッチング電源
Document Type and Number:
Japanese Patent JP7152946
Kind Code:
B2
Abstract:
To provide a highly efficient switching power supply.SOLUTION: A switching power supply 100 includes a switching output circuit that generates an output voltage from an input voltage by turning on/off an output transistor and charging a capacitor, a control circuit 180 that stops driving the switching output circuit when a charge to a capacitor by one switching is limited to a lower limit value and a feedback voltage FB according to the output voltage rises from a predetermined reference voltage REF, and a lower limit value setting circuit 700 that variably controls the lower limit value during the driving period of the switching output circuit. The lower limit value setting circuit 700 raises the lower limit value as the number of times of switching increases.SELECTED DRAWING: Figure 2
Inventors:
Shoji Takenaka
Masatsugu Nagasato
Tetsuishi Tetsuo
Masatsugu Nagasato
Tetsuishi Tetsuo
Application Number:
JP2018230997A
Publication Date:
October 13, 2022
Filing Date:
December 10, 2018
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H02M3/155
Domestic Patent References:
| JP200472992A | ||||
| JP2007129849A | ||||
| JP200720352A | ||||
| JP2010154706A | ||||
| JP20114550A | ||||
| JP2008141845A |
Foreign References:
| US20150303800 |
Attorney, Agent or Firm:
Patent Business Corporation Sano Patent Office