Advanced constant off-time control for four-switch buck-boost converter
US11121632B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2020 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Jan 21, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A buck-boost converter comprises generating a first ramp using a first current source having a current level proportional to an input voltage of a buck-boost converter, and a second ramp using a second current source having a current level proportional to an output voltage of the buck-boost converter, generating a first threshold voltage proportional to a difference between the input voltage and the output voltage of the buck-boost converter, and a second threshold voltage proportional to the input voltage of the buck-boost converter, terminating a gate drive signal of a first low-side switch of the buck-boost converter based upon comparing the first threshold voltage and the first ramp, and terminating a gate drive signal of a second high-side switch of the buck-boost converter based upon comparing the second threshold voltage and the second ramp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.