Techniques to reduce audible noise in a power supply transformer
US8879280B2 · kind B2 · utility
0Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2008 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Oct 3, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This disclosure relates to a switching power supply with regulated voltage suppression to reduce transformer audio noise. A switched mode power supply (SMPS) may supply power at different levels according to output loads. A switching frequency of the SMPS may be adjusted according to the output load. The switching may be subject to a ringing suppression time, a maximum on time, and a maximum switching period. By controlling the switching frequency subject to these quantities, the audible noise of an SMPS may be reduced or eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.