美国国家半导体公司(NS)日前推出两款适用于移动电话及其他便携式电子产品的全新单芯片Boomer音频放大器,无论电池电压下跌到什么水平,系统仍可输出高达1.8W的功率。 LM4804及LM4805芯片可提升电池的内部电压,允许内置音频放大器自动获得稳定的高压供电。此外,它们还可连续输出极高功率的单芯片音频放大器,可以精简系统设计、缩小产品体积并节省生产成本。 National Semiconductor Corp. (NAS) introduced two new single-chip Boomer audio amplifiers for mobile phones and other portable electronics that deliver up to 1.8W of power no matter what the battery voltage has dropped to. The LM4804 and LM4805 chips boost the internal voltage of the battery, allowing the built-in audio amplifier to automatically obtain stable high-voltage power. In addition, they deliver continuous, high-power, single-chip audio amplifiers that streamline system design, reduce product size, and save manufacturing costs.