Chip level integration of a boosted class-D amplifier and integrated LED flash driver
US9377792B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2012 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Feb 24, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A single integrated circuit includes a single boost converter, a first circuit, a second circuit, and a controller. The single boost converter supplies power to the first and second circuits. The controller receives an operational mode signal and in response to the operational mode signal, drives the single boost converter to respectively provide power to the first and second circuits. When the first and second circuits are simultaneously active, the controller manages an operation of the first circuit so that proper operation of the second circuit is maintained. The first circuit may be an LED flash driver, and the second circuit may be an audio amplifier, such as a Class-D audio amplifier. The controller manages an operation of the audio amplifier so that a sufficient amount of current is supplied to the LED flash driver for proper operation of the LED flash driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.