LED lighting circuit, LED illumination device, and LED illumination unit socket
US-9226364-B2 · Dec 29, 2015 · US
Flyback AC-to-DC converter
US9307586B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9307586-B2 |
| Application number | US-201313951559-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 26, 2013 |
| Priority date | Jul 26, 2012 |
| Publication date | Apr 5, 2016 |
| Grant date | Apr 5, 2016 |
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Abstract
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Techniques and corresponding circuitry and drivers are disclosed for improving power factor (PF) and total harmonic distortion (THD) of a flyback power factor correction (PFC) topology operating in transition-mode. In one or more embodiments, the PF and THD are improved by correcting the on-time of the switching element of the flyback PFC topology to actively shape the wave of the PFC input current. In some embodiments, the on-time is corrected using a phase-lock-loop module that synchronizes with the rectified input line voltage signal and a output regulator module that corrects the switch on-time. The control may be implemented using a digital or an analog controller.
First claim
Opening claim text (preview).
What is claimed is: 1. A device, comprising: a phase-lock-loop (PLL) module configured to synchronize with a rectified line voltage signal input to a flyback converter to power a load, and to detect changes in phase of the rectified line voltage signal; and an output regulator module configured to regulate at least one of output current, output voltage, and/or output power to the load, using an on-time control signal that reflects a correction factor based on phase variation in…
Assignees
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Classifications
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
- H05B33/08Primary
Electricity · mapped topic
- H02M3/33515Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9307586B2 cover?
- Techniques and corresponding circuitry and drivers are disclosed for improving power factor (PF) and total harmonic distortion (THD) of a flyback power factor correction (PFC) topology operating in transition-mode. In one or more embodiments, the PF and THD are improved by correcting the on-time of the switching element of the flyback PFC topology to actively shape the wave of the PFC input cur…
- Who is the assignee on this patent?
- Imam Afroz, Antony Biju, Osram Sylvania Inc
- What technology area does this patent fall under?
- Primary CPC classification H05B33/08. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 05 2016 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).