| 摘要 |
PURPOSE: An output control device of an audio amp and method thereof are provided to protect an audio amp and a speaker end circuit from a voltage such as surge by blocking an amplification of an audio amp according to abnormal voltage. CONSTITUTION: A power supply(110) changes a commercial AC power source provided from external side into a DC current by needing an audio amplifier. An audio amplifier(130) changeably amplifies an audio signal inputted according to an operating voltage provided from the power supply according to a gain control signal. A voltage distribution unit(150) drops a voltage into a constant voltage by distributing a voltage outputted from the power supply. An amplifier control unit(170) determines a voltage level provided from an audio amp through a detected signal through the voltage distribution unit. |
