Controller chip for a flyback converter, corresponding flyback converter and switched-mode power supply system
US12088192B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2022 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Apr 27, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33523
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller chip of a flyback converter, a flyback converter and a switched-mode power supply system are disclosed. In the controller chip, a current scaling module is added, which converts a feedback current signal at a feedback pin of the controller chip to allow compensation capacitor with a small capacitance to be integrated into the chip to constitute a required pole compensation module. In this way, a pole required by the feedback pin FB can be successfully provided in the chip. As a result, filtering of high-frequency noise in a feedback path in which the feedback pin FB is located can be achieved, reducing ripple in an output voltage generated by the flyback converter. Moreover, without changing a sampling gain and the compensation pole, it is allowed to greatly reduce the compensation capacitance, for example, to the order of 10 pF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.