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SM6802A 参数 Datasheet PDF下载

SM6802A图片预览
型号: SM6802A
PDF下载: 下载PDF文件 查看货源
内容描述: D类立体声放大器器用于便携式设备 [Class-D Stereo Amplifier for Portable Device]
分类和应用: 放大器便携式便携式设备
文件页数/大小: 15 页 / 213 K
品牌: NPC [ NIPPON PRECISION CIRCUITS INC ]
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SM6802A  
FUNCTIONAL DESCRIPTION  
Power-down (PDWN)  
The device enters power-down mode when PDWN goes LOW. When powered-down, the outputs become high  
impedance and the internal oscillation stops. In power-down mode, the MUTEN pin should be held LOW.  
Mute (MUTEN)  
Mute operation occurs when MUTEN goes LOW. In mute mode, the outputs become high impedance. During  
mute operation, the protection circuit operation is disabled, but the outputs are protected against output short  
circuits by their high impedance state. When power is applied, MUTEN should be held LOW for a short inter-  
val, shown in the timing diagram below, to prevent pop noise from the speaker. Also, applying and releasing  
mute operation after power is applied can occur at high speed without generating pop noise.  
min. 40msec  
PDWN  
MUTEN  
Note. VREF1 load capacitance = 1µF  
Protection Circuit  
The protection circuit operates if there is an output short-circuit to the supply, short-circuit to ground, or other  
excessive load abnormal condition lasting longer than approximately 1µs. Normal operation resumes after  
approximately 5 seconds. When the protection circuit becomes active, the outputs become high impedance.  
NIPPON PRECISION CIRCUITS INC.—8