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XS9971 一款低EMI,无需滤波器, AB/D类 可选式音频功率放大器功能介绍
Date:March 9, 2022 Views:2463
XS9971
是一款低EMI,无需滤波器, AB/D类 可选式音频功率放大器。5.5V 工作电压时,最大 驱动功率为5.5W(VDD=5V,2Ω BTL 负载, THD<10%),音频范围内总谐波失真噪声小于1%(20Hz~20KHz);
XS9971
的应用电路简单,只需极少数外围器件;
XS9971
输出不需要外接耦合电容或上举电容和缓冲网络;
XS9971
采用ESOP8封装,特别适合用于小音量、小体重的便携系统中;
XS9971
可以通过控制进入关断模式,从而减少功耗;
XS9971
内部具有过热自动关断保护机制;
XS9971
采用ESOP8封装;
XS9971
工作稳定,通过配置外围电阻可以调整 放大器的电压增益,方便应用。
XS9971
应用于手提电脑、台式电脑、扩音器、蓝牙音箱。
XS9971
特性指标为:
1.超低EMI,高效率,音质优
2.AB/D 类切换、单通道
3.VDD=5.5V,RL=2Ω,Po=5.5W,THD+N≤10% VDD=5V,RL=4Ω,Po=3W,THD+N≤10%
4.宽工作电压范围2.5V—7V
5.优异的上掉电POP 声抑制
6.
XS9971
采用ESOP8封装
注: 以上应用图中元件说明:
Ci:隔直电容,采用 0.1µF 或更小的,进一步消除咔嗒-噼噗声和从输入端耦合进入的噪声。
Cs:电源去耦电容,采用足够低 ESR 的电容(小于 1µF),当 VDD=5V 时,为更好的滤除低频噪声,建议另加一个低 ESR 电容(不小于 10µF)。去耦电容离 VDD 管脚越近越好,保持 1.5mm 之内。
CB : BYPASS 端口输出VDD/2 电压,通过电容 CB (1µF)接地以保证稳定性。
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XS4890B一颗带关断模式的单通道音频功放IC 功能介绍
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