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EEPW首頁(yè) > 嵌入式系統 > 設計應用 > TDA7498設計的100W+100W D類(lèi)音頻放大技術(shù)

TDA7498設計的100W+100W D類(lèi)音頻放大技術(shù)

作者： 時(shí)間：2010-06-22 來(lái)源：網(wǎng)絡(luò ) 收藏
TDA7498是100W+100W雙BTL D類(lèi)音頻放大器,主要用在家庭影院和有源揚聲器. TDA7498單電源10-39V工作,效率高達90%,增益設定為25.6 dB, 31.6 dB, 35.1 dB和37.6 dB, 在THD = 10%, RL = 6歐姆和VCC = 36 V時(shí)的輸出功率為100W+100W.本文介紹了TDA7498主要特性, 內部方框圖, 特性測量電路圖, 6和8歐姆揚聲器應用電路圖以及待機和靜音電路圖, 6和8歐姆揚聲器LC濾波器電路圖.

TDA7498:100 W + 100 W dual BTL class-D audio amplifier.

The TDA7498 is a dual BTL class-D audio amplifier with single power supply designed for home systems and active speaker applications. It comes in a 36-pin PowerSSO package with exposed pad up (EPU) to facilitate mounting a separate heatsink.

TDA7498主要特性:

100 W + 100 W output power at THD = 10% with RL = 6ohm and VCC = 36 V

Wide range single supply operation (10 - 39 V)

High efficiency (= 90%)

Four selectable, fixed gain settings of nominally 25.6 dB, 31.6 dB, 35.1 dB and 37.6 dB

Differential inputs minimize common-mode noise

Standby and mute features

Short-circuit protection

Thermal overload protection

Externally synchronizable


圖1.TDA7498內部方框圖(僅顯示一路)

圖2.TDA7498特性測量電路圖

圖3.TDA7498 6歐姆揚聲器應用電路圖
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