Charger attach detection
US10417158B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2018 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Nov 7, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for detecting charger connection through a universal serial bus (UBS) connector is disclosed. The circuit includes a comparator having a first input coupled to a fixed voltage reference and a second input coupled to D+ pin of the USB connector, a voltage controlled current source (VCCS) coupled having a first terminal coupled to a supply and a second terminal coupled to the D+ pin and a resistor coupled between the first terminal and the second terminal of the VCCS. The VCCS is configured to bring voltage at the D+ pin within a preselected voltage range at the D+ pin when the voltage at the D+ pin varies beyond the preselected voltage range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.