Primary-side feedback control device and related method for a power converter
US7911815B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2008 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Feb 5, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33523
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A primary-side feedback control device for a power converter includes a control unit for generating a pulse signal according to a feedback signal for controlling on and off states of a switching transistor of the power converter, a comparator coupled to an auxiliary winding of a primary side of the power converter for generating at least one control signal according to a voltage on the auxiliary winding and a reference voltage, a sample-and-hold unit coupled to the auxiliary winding, the comparator, and the control unit for generating the feedback signal according to the voltage on the auxiliary winding and the at least one control signal, and a voltage generator coupled to the control unit, the comparator, and the sample-and-hold unit for generating the reference voltage according to the feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.