Reverse current prevention
US9306520B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2013 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Jul 31, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/0238
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Techniques for preventing reverse current in applications wherein a tracking supply voltage is placed in parallel with a switching power stage. The tracking supply voltage may be boosted to a level higher than a battery supply voltage using, e.g., a boost converter. In an aspect, a negative current detection block is provided to detect negative current flow from the boosted tracking supply voltage to the battery supply voltage. A high-side switch of the switching power stage may be disabled in response to detecting the negative current. To prevent false tripping, the tracking supply voltage may be further compared with the battery supply voltage, and a latch may be provided to further control the high-side switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.