TI TPA2015高效D类音频功率放大解决方案

TI 公司的TPA2015是高效D类音频功率放大器，采用电池跟踪SpeakerGuard AGC技术，并集成了自适应的升压转换器，能增加低输出功率的效率。3.6V电源时TPA2015能向8欧姆扬声器提供2W功率，THD为6%，效率85%。工作电压2.5V-5.2V，带自动恢复的热和短路保护，有三种增益设定：6 dB, 15.5 dB和20 dB，主要用在手机，PDA，GPS，手提电子学和扬声器。本文介绍了TPA2015主要特性，功能方框图，性能测试框图以及差分和单端输入典型应用方框图，放大器评估板TPA2015D1主要指标，电路图和材料清单。

The TPA2015D1 is a high efficiency Class-D audio power amplifier with battery-tracking SpeakerGuard AGC technology and an integrated adaptive boost converter that enhances efficiency at low output power. It drives up to 2 W into an 8  speaker (6% THD). With 85% typical efficiency, the TPA2015D1 helps extend battery life when playing audio.

The built-in boost converter generates a 5.5 V supply voltage for the Class-D amplifier. This provides a louder audio output than a stand-alone amplifier directly connected to the battery. The SpeakerGuardTM AGC adjusts the Class-D gain to limit battery current and prevent heavy clipping.

The TPA2015D1 has an integrated low-pass filter to improve the RF rejection and reduce DAC out-of-band noise, increasing the signal to noise ratio (SNR).

TPA2015主要特性：

Built-In SpeakerGuard™ Automatic Gain Control (AGC)
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