Switching power source, method and control chip for controlling the same
US-2015381058-A1 · Dec 31, 2015 · US
Power supply device with smoothing capacitor and falling voltage chopper circuit
US8976558B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8976558-B2 |
| Application number | US-201213422418-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 16, 2012 |
| Priority date | Jul 8, 2011 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
Official abstract text for this publication.
According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply, a first capacitor configured to smooth a voltage after rectification, and a falling voltage chopper circuit configured to supply electric power to a load. The first capacitor is set to a capacity in which a section where a voltage after smoothing drops to an output voltage to the load is provided in a rectified half period of the alternating-current power supply. The falling voltage chopper circuit includes at least one switching element configured to receive an input of the voltage after smoothing, operate in a section where the voltage after smoothing exceeds the output voltage, and pause in a section of the output voltage and a second capacitor provided on an output side and having a capacity larger than the capacity of the first capacitor.
First claim
Opening claim text (preview).
What is claimed is: 1. A power supply device comprising: a rectifying circuit configured to rectify an alternating-current power supply; a first capacitor configured to smooth a voltage after rectification, the first capacitor being set to a capacity such that a voltage after smoothing drops to an output voltage to a load in a rectified half period of the alternating-current power supply and remains dropped to the output voltage until the next half period; and a falling voltag…
Assignees
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Classifications
Electricity · mapped topic
Electricity · mapped topic
- H02M7/2176Primary
Electricity · mapped topic
- H05B33/0815Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8976558B2 cover?
- According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply, a first capacitor configured to smooth a voltage after rectification, and a falling voltage chopper circuit configured to supply electric power to a load. The first capacitor is set to a capacity in which a section where a voltage after smoothing drops to a…
- Who is the assignee on this patent?
- Kato Go, Hiramatsu Takuro, Sakai Kenji, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification H02M7/2176. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 10 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).