TDA7492是市场上***额定功率50W+50W的放大器，采用支持单片集成模拟、逻辑和高压功能的***的第六代BCD6S制程(双极/CMOS/DMOS)。与其它的D类放大器相比，ST的BCD6S制程取得了更高芯片面积能效比，同时还降低了串扰，提高了音质。此外，BCD6S准许在高功率输出电路内集成NMOS和PMOS互补晶体管，省去了旧式制程所需的外部自举电容和阴极负载二极管。这种方法体系简化了设计，节省电路板空间，提高产品设计的可靠性，并优化了材料成本。TDA7492主要特性:50W+50WcontinuousoutputpoweratTHD=10%withRL=6ΩandVCC=25V40W+40WcontinuousoutputpoweratTHD=10%withRL=8ΩandVCC=25VWide-rangesingle-supplyoperation(8-26V)Highefficiency(η=90%)Fourselectable,fixedgainsettingsofnominally21.6dB,27.6dB,31.1dBand33.6dBDifferentialinputsminimizecommon-modenoiseStandbyandmutefeaturesShort-circuitprotectionThermaloverloadprotectionExternallysynchronizableECOPACK®,environmentally-friendlypackageTDA7492应用原理图)