High-efficiency low-ripple burst mode for a charge pump
US11557964B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2021 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | May 28, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus is disclosed for operating a charge pump in a high-efficiency low-ripple burst mode. In an example aspect, the apparatus includes a charge pump with a flying capacitor, a switching circuit, and a burst-mode controller. The switching circuit is coupled to the flying capacitor and configured to selectively: be in a burst configuration to charge and discharge the flying capacitor based on a clock signal; or be in a pulse-skipping configuration. The burst-mode controller is coupled to the switching circuit and configured to trigger the switching circuit to transition from the pulse-skipping configuration to the burst configuration at a time that occurs between rising edges of the clock signal. The burst-mode controller is also configured to cause charging of the flying capacitor to occur for approximately half a period of the clock signal responsive to triggering the switching circuit to transition from the pulse-skipping configuration to the burst configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.