Title:
SWITCHING POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/032577
Kind Code:
A1
Abstract:
A switching power supply device 21 according to one aspect of the present disclosure comprises an ON timing generation circuit 6 that generates a timing of turning on a switching element 1 for reducing an input voltage VIN to generate an output voltage VOUT by switching, and an ON time generation unit 22 that generates a time in which the ON state of the switching element 1 is kept. Specifically, the switching power supply device 21 comprises a ramp wave signal generation circuit 30 that generates a ramp wave signal by using a combination of a current supply circuit 23 that causes a constant current proportional to a voltage obtained by subtracting an offset voltage from the input voltage VIN to flow, a capacitor 8 that is charged by the constant current, and a switching circuit 9 that is a discharge switching element for discharging the capacitor 8, and a comparator 10 that compares the output voltage and the ramp wave signal with each other.
Inventors:
ASAHI TAKASHI (JP)
Application Number:
PCT/JP2022/029791
Publication Date:
March 09, 2023
Filing Date:
August 03, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02M3/155
Domestic Patent References:
| WO2012147609A1 | 2012-11-01 |
Foreign References:
| JP2008092740A | 2008-04-17 | |||
| JP2011087405A | 2011-04-28 | |||
| US20120019218A1 | 2012-01-26 | |||
| US20160301303A1 | 2016-10-13 |
Attorney, Agent or Firm:
SATO INTERNATIONAL PATENT FIRM (JP)
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