TI TAS5412－Q1 双通道汽车级数字音频功放参考设计方案

TI公司的TAS5412-Q1是一款用于汽车头部单位和外部放大器的双通道数字音频放大器，它提供了两个通道在总谐波失真及噪声在10%以内，4Ω负载时可达到28W、在2Ω负载时可达到46W。数字PWM拓扑提供了比传统线性放大器更合理的改善效率解决方案。在典型的音乐播放条件下，这减少了一个数量级的放大器功率损耗。该设备包含一个专利的设计,提供了出色的PWM供电排斥，在严酷的电气环境共同实现汽车应用。应用实现效率高而不需要复杂的供电方案。设计允许多个设备的同步。本文首先介绍芯片的简介、特性、内部框图及应用领域，并给出相应设计方案的设计原理图、元器件列表及PCB元件布局图。

The device is a two-channel digital audio amplifier designed for use in automotive head units and external amplifiers. It provides two channels at 28 W into 4 Ω at 10% THD+N from 14.4 V or 46 W into 2 Ω at 10% THD+N. The digital PWM topology provides dramatic improvements in efficiency over traditional linear amplifier solutions. This reduces the power dissipated by the amplifier by a factor of ten under typical music playback conditions. The device incorporates a patented PWM design that provides excellent power-supply rejection in the harsh electrical environment common in automotive applications. Applications attain high efficiency without the need for complicated power supply schemes. The design allows synchronization of multiple devices.
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