Auto load switch detection for wireless power receiver
US9680309B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2013 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Sep 19, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus and methods are provided to automatically detect and control a load switch for a wireless power receiver. In one novel aspect, a method is provided to adaptively control the load switch based on the output condition of a rectified output according to a predefined criteria. In one embodiment of the invention, the methods to adaptively control the load switch comprises a first stage that turns on the load switch quickly; a second stage that stops turning on the load switch and holds the load switch at its current value; a third stage that slowly pulls down the load switch; and a fourth stage that quickly turns off the load switch. In another embodiment, an integrated circuit for a wireless power pick up unit is provided to control the load switch adaptively based on a rectified output feedback and a predefined criteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.