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TDA7492是市場上首款額定功率50W+50W的放大器，采用支持單片集成模擬、邏輯和高壓功能的先進(jìn)的第六代BCD6S制程 (雙極/CMOS/DMOS)。與其它的D類放大器相比，ST的BCD6S制程取得了更高芯片面積能效比，同時還降低了串?dāng)_，提高了音質(zhì)。此外，BCD6S準(zhǔn)許在高功率輸出電路內(nèi)集成NMOS和PMOS互補晶體管，省去了舊式制程所需的外部自舉電容和陰極負(fù)載二極管。這種方法體系簡化了設(shè)計，節(jié)省電路板空間，提高產(chǎn)品設(shè)計的可靠性，并優(yōu)化了材料成本。

TDA7492主要特性:
50 W + 50 W continuous output power atTHD = 10% with RL = 6 Ω and VCC = 25 V
40 W + 40 W continuous output power atTHD = 10% with RL = 8 Ω and VCC = 25 V
Wide-range single-supply operation (8 - 26 V)
High efficiency (η = 90%)
Four selectable, fixed gain settings of nominally 21.6dB, 27.6dB, 31.1 dB and 33.6dB
Differential inputs minimize common-mode noise
Standby and mute features
Short-circuit protection
Thermal overload protection
Externally synchronizable
ECOPACK®, environmentally-friendly package

TDA7492 應(yīng)用原理圖