Capacitive-summing switch-mode power conversion control
US6066943A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1998 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Oct 8, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller for a power converter wherein there is provided a comparator having an output terminal and first and second input terminals. A switch-mode power train is coupled to the output terminal and operable to receive an unregulated input voltage and provide a regulated output voltage. A feedback network coupled to the switch-mode power train provides a voltage to the first input of the comparator. A ramp circuit includes a first capacitor divider having a first capacitor connected from a first input node to a first midpoint node and a second capacitor connected from the first midpoint node to a first reference voltage node and a second capacitor divider including a third capacitor connected from a second input node to a second midpoint node and a fourth capacitor connected from the second midpoint node to the first reference node. A first switch couples the first or second midpoint node to the second input of said comparator. A second switch couples a current source to the first input node when the first switch connects the first midpoint node to the comparator or to the second input node when the first switch connects the second midpoint node to the comparator. A third switch…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.