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	 > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > TDA7498設(shè)計(jì)的100W+100W D類音頻放大技術(shù)
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          TDA7498設(shè)計(jì)的100W+100W D類音頻放大技術(shù)
          
						
          
				作者：
				時(shí)間：2010-06-22
				來(lái)源：網(wǎng)絡(luò)
				
				
				
				
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			TDA7498是100W+100W雙BTL D類音頻放大器,主要用在家庭影院和有源揚(yáng)聲器. TDA7498單電源10-39V工作,效率高達(dá)90%,增益設(shè)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(nèi)部方框圖, 特性測(cè)量電路圖, 6和8歐姆揚(yáng)聲器應(yīng)用電路圖以及待機(jī)和靜音電路圖, 6和8歐姆揚(yáng)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(nèi)部方框圖(僅顯示一路)

          圖2.TDA7498特性測(cè)量電路圖

          圖3.TDA7498 6歐姆揚(yáng)聲器應(yīng)用電路圖
          
				
            
                
			
							
          
                
			            
          
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