High-speed reflected signal detection for primary-side controlled power converters
US8854841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2010 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Jan 18, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33523
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller for a power converter includes a clamping circuit, a switching circuit and a pulse generator. The clamping circuit is coupled to an input terminal of the controller for detecting a detection signal from a transformer. The switching circuit generates a switching signal to switch the transformer in response to the detection signal for regulating the power converter. A maximum level of the detection signal is clamped to be under a level of a threshold voltage during an off-period of the switching signal. Since the maximum level of the detection signal is clamped and the oscillating energy of the reflected signal is discharged, the speed of detecting the detection signal is increased. Therefore, the regulation of the primary-side controlled power converter can be improved accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.