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| TI TPA2015高效D类音频功率放大解决方案 | |||||
作者：TI 文章来源：TI 点击数： 更新时间：2010-8-2  |
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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) with Enhanced Battery Tracking Limits Battery Current Consumption Prevents Audio Clipping 2 W into 8 Load From 3.6 V Supply (6% THD) Integrated Adaptive Boost Converter Increases Efficiency at Low Output Power Low Quiescent Current of 1.7 mA from 3.6 V Operates From 2.5 V to 5.2 V Thermal and Short-Circuit Protection with Auto Recovery Three Gain Settings: 6 dB, 15.5 dB, and 20 dB Independent Control for Boost and Class-D Pin-to-Pin Compatible with TPA2013D1 Available in 1.954 mm × 1.954 mm 16-ball WCSP Package TPA2015应用： Cell Phones, PDA, GPS Portable Electronics and Speakers  图1。TPA2015功能方框图  图2。TPA2015测试框图  图3。TPA2015差分输入典型应用方框图  图4。TPA2015单端输入典型应用方框图  图5。TPA2015采用外接输入滤波器降低DAC带外噪音 音频功率放大器评估板TPA2015D1 The TPA2015D1 audio power amplifier evaluation module is a complete, stand-alone audio board. It contains the TPA2015D1 WCSP (YZH) Class-D audio power amplifier with an integrated boost converter. All components and the evaluation module are Pb-Free. 评估板TPA2015D1指标：   图6。评估板TPA2015D1 EVM电路图 评估板TPA2015D1 EVM材清单（BOM）：    图7。评估板TPA2015D1 PCB布局图 详情请见： http://focus.ti.com/lit/ds/symlink/tpa2015d1.pdf 和 http://focus.ti.com/lit/ug/slou264/slou264.pdf |
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