Negative current sense feedback for reverse boost mode
US9442503B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2013 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Feb 20, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Techniques for providing negative current information to a control loop for a buck converter in reverse boost mode. In an aspect, negative as well as positive current through an inductor is sensed and provided to adjust a ramp voltage in the control loop for the buck converter. The techniques may prevent current through the inductor during reverse boost mode from becoming increasingly negative without bound; the techniques thereby reduce settling times when the target output voltage is reduced from a first level to a second level. In an aspect, the negative current sensing may be provided by sensing negative current through a charging, or PMOS, switch of the buck converter. The sensed negative current may be subtracted from a current used to generate the ramp voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.