TI TAS5727 25W数字音频功率放大方案

TI 公司的TAS5727是 用来驱动立体声桥接扬声器的25W数字音频功率放大器，VDD电压从8V到26V，在20V电源时能向8欧姆负载提供25W功率，还支持BTL配置的4欧姆负载，支持44.1-kHz 到 48-kHz的取样频率，主要用在LCD TV, LED TV和条形音箱。本文介绍了TAS5727主要特性，功能框图，简化应用电路，评估模块TAS5727EVM 和MC57xxPSIA 主要特性，电路图以及评估模块TAS5727EVM的材料清单（BOM）。

25-W DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC

The TAS5727 is a 25-W, efficient, digital-audio power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two discrete audio channels and seamless integration to most digital audio processors and MPEG decoders. The device accepts a wide range of input data and data rates. A fully programmable data path routes these channels to the internal speaker drivers.

The TAS5727 is a slave-only device receiving all clocks from external sources. The TAS5727 operates with a PWM carrier between a 384-kHz switching rate and a 288-KHz switching rate, depending on the input sample rate. Oversampling combined with a fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.

TAS5727主要特性：

Audio Input/Output

25 W Into an 8-Ω Load From a 20-V Supply
..

查看全文