Title:
POWER SOURCE FOR DRIVING SYNCHRONOUS RECTIFICATION ELEMENT OF SEPIC CONVERTER
Document Type and Number:
WIPO Patent Application WO/2022/137292
Kind Code:
A1
Abstract:
The present invention stably supplies a power source for driving a DC-DC converter including a synchronous rectification-type SEPIC circuit. A synchronous rectification-type SEPIC circuit 1, including inductors 2, 5, a switch element 3, a capacitor 4, a synchronous rectification element 6, and an output capacitor 7, is provided with a drive voltage switching unit 15 for stably supplying a drive signal voltage of the synchronous rectification element 6 regardless of whether an output voltage Vo is greater or less than a drive power voltage Vdrv of the synchronous rectification element 6. The drive voltage switching unit 15 is characterized by including a means for: switching connection so that power is supplied from the output voltage Vo to a second drive circuit 10 if the output voltage Vo is set higher than the drive power voltage Vdrv; and switching connection so that power is supplied from the drive voltage Vdrv if the output voltage Vo is set lower than the drive voltage Vdrv.
Inventors:
NAKAMURA MASARU (JP)
ASO SHINJI (JP)
YAO JIANAO (JP)
ASO SHINJI (JP)
YAO JIANAO (JP)
Application Number:
PCT/JP2020/047724
Publication Date:
June 30, 2022
Filing Date:
December 21, 2020
Export Citation:
Assignee:
SANKEN ELECTRIC CO LTD (JP)
International Classes:
H02M3/155
Foreign References:
| JP2017069180A | 2017-04-06 | |||
| JP2019058016A | 2019-04-11 |
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