Control circuit for switching converter with minimum on-time and off-time control and wide duty range
US12170482B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2022 |
| Grant date | Dec 17, 2024 |
| Priority date | — |
| Expiry date | Mar 9, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit for a switching converter, where: in a first operation state, the control circuit controls a switching period of the switching converter to remain unchanged, controls a turn-on time of a power transistor in the switching converter to be not less than a minimum turn-on time in each switching period, and controls a turn-off time of the power transistor to be not less than a minimum turn-off time; in a second operation state, the control circuit controls the turn-on time of the power transistor to be the minimum turn-on time in each switching period, and adjusts the switching period to further reduce a duty cycle; and in a third operation state, the control circuit controls the turn-off time of the power transistor to be the minimum turn-off time in each switching period, and adjusts the switching period to further increase the duty cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.