Digital pulse-frequency modulation controller for switch-mode power supplies with frequency targeting and ultrasonic modes
US8525502B2 · kind B2 · utility
8Cited by
7References
27Claims
0Family size
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Key dates
| Filing date | Mar 2, 2011 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Nov 18, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digital pulse controller uses digital logic to send pulses to a high side and low side switches of a switch-mode power supply converter. The digital logic uses a pulse frequency mode which includes a frequency targeting mode and an ultrasonic mode. The frequency targeting mode dynamically adjusts the size of the pulses in order to achieve a switching frequency within a desired band. The ultrasonic mode is switched into when the frequency of the pulses are at or below a threshold and the time of the pulses reaches a minimum threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.