CHIP LEVEL INTEGRATION OF A BOOSTED CLASS-D AMPLIFIER AND INTEGRATED LED FLASH DRIVER

摘要

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 arid 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.