Method and apparatus for modifying right half-plane zero in a cascaded DC-DC buck-boost converter
US7977928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2009 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Apr 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1582
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method to generate a substantially DC output having a voltage level different than a DC input, constituted of receiving a feedback signal representing at least one of the voltage level and the current level of the generated substantially DC output; relatively emphasizing the high frequency portion of the feedback signal; controlling the buck function of a cascaded buck-boost converter with a first switching signal having a first duty cycle, the first duty cycle being a first function of the received feedback signal responsive to said relatively emphasized high frequency portion; and controlling the boost function with a second switching signal having a second duty cycle, the second duty cycle being a second function of the received feedback signal, wherein the first switching signal and the second switching signal are continuously enabled to facilitate a continuous conduction mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.