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LM4946 PDF预览

LM4946

更新时间: 2024-01-03 09:44:56
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
28页 1279K
描述
Output Capacitor-Less Audio Subsystem with Programmable National 3D

LM4946 技术参数

是否Rohs认证: 符合生命周期:Transferred
包装说明:FBGA, BGA25,5X5,16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.33.00.01
风险等级:5.46商用集成电路类型:AUDIO AMPLIFIER
JESD-30 代码:S-PBGA-B25JESD-609代码:e1
长度:2 mm湿度敏感等级:1
信道数量:2功能数量:1
端子数量:25最高工作温度:85 °C
最低工作温度:-40 °C标称输出功率:1.3 W
封装主体材料:PLASTIC/EPOXY封装代码:FBGA
封装等效代码:BGA25,5X5,16封装形状:SQUARE
封装形式:GRID ARRAY, FINE PITCH峰值回流温度(摄氏度):260
电源:3.3/5 V认证状态:Not Qualified
子类别:Audio/Video Amplifiers最大压摆率:10.5 mA
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):2.7 V
表面贴装:YES温度等级:INDUSTRIAL
端子面层:Tin/Silver/Copper (Sn/Ag/Cu)端子形式:BALL
端子节距:0.4 mm端子位置:BOTTOM
处于峰值回流温度下的最长时间:40宽度:2 mm
Base Number Matches:1

LM4946 数据手册

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May 2006  
LM4946  
Output Capacitor-Less Audio Subsystem with  
Programmable National 3D  
General Description  
Key Specifications  
The LM4946 is an audio power amplifier capable of deliver-  
ing 540mW of continuous average power into a mono 8  
bridged-tied load (BTL) with 1% THD+N, 35mW per channel  
of continuous average power into stereo 32single-ended  
(SE) loads with 1% THD+N, or an output capacitor-less  
(OCL) configuration with identical specifications as the SE  
configuration, from a 3.3V power supply.  
j
THD+N at 1kHz, 540mW  
into 8BTL (3.3V)  
1.0% (typ)  
j
THD+N at 1kHz, 35mW  
into 32SE (3.3V)  
1.0% (typ)  
2.7 to 5.5V  
2.2 to 5.5V  
j
j
Single Supply Operation (VDD  
I2C/SPI Single Supply Operation  
)
The LM4946 has three input channels: one pair for a two-  
channel stereo signal and the third for a differential single-  
channel mono input. The LM4946 features a 32-step digital  
volume control and eight distinct output modes. The digital  
volume control, 3D enhancement, and output modes (mono/  
SE/OCL) are programmed through a two-wire I2C or a three-  
wire SPI compatible interface that allows flexibility in routing  
and mixing audio channels.  
Features  
n I2C/SPI Control Interface  
n I2C/SPI programmable National 3D Audio  
n I2C/SPI controlled 32 step digital volume control (-54dB  
to +18dB)  
n Three independent volume channels (Left, Right, Mono)  
n Eight distinct output modes  
n LLP surface mount packaging  
n “Click and Pop” suppression circuitry  
n Thermal shutdown protection  
The LM4946 is designed for cellular phone, PDA, and other  
portable handheld applications. It delivers high quality output  
power from a surface-mount package and requires only  
seven external components in the OCL mode (two additional  
components in SE mode).  
n Low shutdown current (0.02uA, typ)  
n RF immunity topology  
Applications  
n Mobile Phones  
n PDAs  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2006 National Semiconductor Corporation  
DS201628  
www.national.com  

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