描述 Description

TAS6424R-Q1 器件是一款采用 2.1MHz PWM 開關(guān)頻率的四通道數(shù)字輸入 D 類音頻放大器，以非常小的 PCB 尺寸實(shí)現(xiàn)成本優(yōu)化型器件，可針對(duì)啟停事件在低至 4.5V 的電壓下全面運(yùn)行，并可在高達(dá) 40kHz 的音頻帶寬下提供出色的音質(zhì)。

輸出開關(guān)頻率既可以設(shè)置為高于調(diào)幅 (AM) 頻帶，以消除 AM 頻帶干擾并降低輸出濾波需求及成本；也可以設(shè)置為低于 AM 頻帶，以優(yōu)化器件效率。

該器件具有內(nèi)置負(fù)載診斷功能，用于檢測(cè)和診斷誤接的輸出，以及檢測(cè)交流耦合的高頻揚(yáng)聲器，以幫助縮短制造過程中的測(cè)試時(shí)間。

器件增加了 EMI 管理特性（包括展頻、輸出相位偏移和優(yōu)化的壓擺率），以幫助應(yīng)對(duì)系統(tǒng)級(jí) EMI 挑戰(zhàn)。

TAS6424R-Q1 D 類音頻放大器專為汽車音響主機(jī)和外部放大器模塊而設(shè)計(jì)。有關(guān)引腳兼容的單通道、雙通道及四通道器件，請(qǐng)參閱器件選項(xiàng)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 ? at 14.4 V BTL
? 75 W, 10% THD Into 4 ? at 25 V BTL
? 150W, 10% THD Into 2 ? at 25 V PBTL

? Audio performance into 4 ? 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 k?

? 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