direct-current power supply and battery-powered electronic apparatus equipped with the power supply
US7274116B2 · kind B2 · utility
30Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2004 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | Sep 26, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1582
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bypass control section (6) maintains a bypass switch (5) in the ON state during the period when a battery voltage (Vi) is higher than the output voltage (Vo) to an external load (L). Upon falling of the output voltage (Vo) at a desired voltage (ET), a converter control section (4) starts switching control at once, and a step-up chopper (3) promptly starts boost operation. The bypass control section (6) maintains the bypass switch (5) in the ON state from the start of the boost operation of the step-up chopper (3) until the match between the battery voltage (Vi) and the output voltage (Vo).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.