Multi-tier power supply for audio amplifiers

摘要

Techniques for providing multiple power supplies in electronic devices are disclosed. According to one aspect of the present invention, an appropriate power supply is provided only to accommodate a volume setting. In other words, there are at least two power supplies, one with a low voltage and the other with a high voltage. The high voltage power supply is only applied when there is a need to accommodate a volume setting. Thus the power consumption of the amplifiers is well controlled. As a result, the designs of the device and heat dissipation therein can be simplified and lowered in cost.

主权项

1. An audio player comprising:
an audio amplifier; at least first and second power supplies to provide at least first and second supply voltages, respectively, to energize the audio amplifier; a controller to detect a volume for play of an audio track and switch, based on the volume, between the at least first and second power supplies such that, at any time, only one of the first and second power supplies energizes the audio amplifier in response to the detected volume.