Invention Grant
US08212282B2 Semiconductor device used in step-up DC-DC converter, and step-up DC-DC converter
失效
用于升压型DC-DC转换器的升压型DC-DC转换器
- Patent Title: Semiconductor device used in step-up DC-DC converter, and step-up DC-DC converter
- Patent Title (中): 用于升压型DC-DC转换器的升压型DC-DC转换器
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Application No.: US12889695Application Date: 2010-09-24
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Publication No.: US08212282B2Publication Date: 2012-07-03
- Inventor: Masaya Ohtsuka , Yoshinori Ueda
- Applicant: Masaya Ohtsuka , Yoshinori Ueda
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2006-165589 20060615; JP2007-090883 20070330
- Main IPC: H01L29/66
- IPC: H01L29/66
Abstract:
A power supply device is disclosed that is able to satisfy the power requirements of a device in service and has high efficiency. The power supply device includes a first power supply; a voltage step-up unit that steps up an output voltage of the first power supply; a voltage step-down unit that steps down an output voltage of the voltage step-up unit; and a load that is driven to operate by an output voltage of the voltage step-down unit. The voltage step-up unit steps up the output voltage of the first power supply to a lower limit of an operating voltage of the voltage step-down unit.
Public/Granted literature
- US20110012170A1 SEMICONDUCTOR DEVICE USED IN STEP-UP DC-DC CONVERTER, AND STEP-UP DC-DC CONVERTER Public/Granted day:2011-01-20
Information query
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