System and method for determining adapter current limit
US9715244B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2015 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Jul 13, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/158
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic device that determines an adapter current limit for a power adapter, including a regulator, a voltage comparator, and a controller. The regulator regulates an adapter output current level to prevent it from exceeding the adapter current limit, and provides a regulation signal during regulation. The voltage comparator provides an under-voltage signal when adapter output voltage level falls below a low voltage threshold. The controller initially sets the adapter current limit at a lowest level, increases the adapter current limit by an incremental amount when the regulation signal is provided, and when the under-voltage signal is provided, decreases the adapter current limit by the incremental amount to determine a final adapter current limit. The final adapter current limit is at or near the actual maximum current limit of the power adapter. The adapter current limit may be increased only when regulation occurs for at least a predetermined time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.