Switch-mode power supply having reduced audible noise
US8970198B2 · kind B2 · utility
1Cited by
18References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2013 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Apr 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply having an input and an output, includes a power converter coupled between the input and output of the power supply including at least one switch that is controlled by comparing a sensed voltage, the sensed voltage corresponding to a current flowing through the switch, to a reference voltage. A controller, in response to a change detected in a switching frequency of the switch, reduces audible noise generated by the power supply by at least one of: adjusting the reference voltage; adjusting the current sense voltage; or adjusting a resistance used to generate the sensed voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.