TAS6424R-Q1数据手册TI中文资料规格书

描述 Description

TAS6424R-Q1 器件是一款采用 2.1MHz PWM 开关频率的四通道数字输入 D 类音频放大器，以非常小的 PCB 尺寸实现成本优化型器件，可针对启停事件在低至 4.5V 的电压下全面运行，并可在高达 40kHz 的音频带宽下提供出色的音质。

输出开关频率既可以设置为高于调幅 (AM) 频带，以消除 AM 频带干扰并降低输出滤波需求及成本；也可以设置为低于 AM 频带，以优化器件效率。

该器件具有内置负载诊断功能，用于检测和诊断误接的输出，以及检测交流耦合的高频扬声器，以帮助缩短制造过程中的测试时间。

器件增加了 EMI 管理特性（包括展频、输出相位偏移和优化的压摆率），以帮助应对系统级 EMI 挑战。

TAS6424R-Q1 D 类音频放大器专为汽车音响主机和外部放大器模块而设计。有关引脚兼容的单通道、双通道及四通道器件，请参阅器件选项表。

特性 Features

• AEC-Q100 Qualified for automotive applications
• Temperature grade 1: –40°C to +125°C T A

• Advanced load diagnostics
• DC Diagnostics run without input clocks
• AC Diagnostic for tweeter detection with impedance and phase response

• Easily meets CISPR25-L5 EMC specifications
• Audio inputs
• 4 Channel I 2S or 4/8-channel TDM input
• Input sample rates: 44.1 kHz, 48 kHz, 96 kHz
• Input formats: 16-bit to 32-bit I 2S, and TDM
• Support for high resolution audio systems

• Audio outputs
• Four-channel bridge-tied load (BTL)
• Two-channel parallel BTL (PBTL)
• Up to 2.1 MHz output switching frequency
• 45 W, 10% THD Into 2 Ω at 14.4 V BTL
• 75 W, 10% THD Into 4 Ω at 25 V BTL
• 150W, 10% THD Into 2 Ω at 25 V PBTL

• Audio performance into 4 Ω at 14.4 V BTL
• THD+N
• Load diagnostics
• Open load, shorted load, short-to-battery, short-to-ground
• Line output detection up to 6 kΩ

• Protection
• Enhanced reverse current capabilities
• Output current limiting and short protection
• 40 V Load dump
• Open ground and power tolerant
• DC offset
• Over-temperature, undervoltage, and overvoltage

• General operation
• 4.5 V to 26.4 V supply voltage
• I 2C Control with 4 address options
• Latched and non-latched clip detect
• Enhanced EMI management