System and method for adapting clocking pulse widths for DC-to-DC converters
US8164319B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2008 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Aug 22, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for adapting a width of a clocking pulse for clocking a DC-DC converter, wherein the width of the clocking pulse is selected based upon the duty cycle of the DC-DC converter. When the DC-DC converter operates below a predefined threshold duty cycle, a clocking pulse of a first width is selected to allow operation of the converter at a minimum predefined duty cycle with a clocking frequency that minimizes output voltage ripple. The first width corresponds to an on-time of a switching transistor of the DC-DC converter when the converter is operated at the minimum duty cycle. When the DC-DC converter operates above the predefined threshold duty cycle, a clocking pulse of a second width is selected to allow operation of the converter at high duty cycles while simultaneously avoiding missed inductor current pulses and generation of sub-harmonic voltage oscillations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.