TDA7498設計的100W+100W D類音頻放大技術
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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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