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LM4938MH PDF预览

LM4938MH

更新时间: 2024-11-21 04:20:07
品牌 Logo 应用领域
美国国家半导体 - NSC 音频控制集成电路消费电路商用集成电路放大器功率放大器光电二极管
页数 文件大小 规格书
26页 1630K
描述
Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain

LM4938MH 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:TSSOP-28Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.15信道分离:73 dB
商用集成电路类型:VOLUME CONTROL CIRCUITJESD-30 代码:R-PDSO-G28
JESD-609代码:e0长度:9.7 mm
湿度敏感等级:1信道数量:2
功能数量:1端子数量:28
最高工作温度:85 °C最低工作温度:-20 °C
封装主体材料:PLASTIC/EPOXY封装代码:HTSSOP
封装等效代码:TSSOP28,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):260
电源:3/5 V认证状态:Not Qualified
座面最大高度:1.1 mm子类别:Audio/Video Amplifiers
最大压摆率:30 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:OTHER端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:0.65 mm
端子位置:DUAL处于峰值回流温度下的最长时间:40
宽度:4.4 mmBase Number Matches:1

LM4938MH 数据手册

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February 2005  
LM4938  
Stereo 2W Audio Power Amplifiers  
with DC Volume Control and Selectable Gain  
General Description  
Key Specifications  
n PO at 1% THD+N  
The LM4938 is a monolithic integrated circuit that provides  
DC volume control, and stereo bridged audio power amplifi-  
ers capable of producing 2W into 4(Note 1) with less than  
1.0% THD or 2.2W into 3(Note 2) with less than 1.0%  
THD.  
n
n
n
into 3Ω  
into 4Ω  
into 8Ω  
2.2W (typ)  
2.0W (typ)  
1.3W (typ)  
n Single-ended mode - THD+N at 92mW into  
Boomer® audio integrated circuits were designed specifically  
to provide high quality audio while requiring a minimum  
amount of external components. The LM4938 incorporates a  
DC volume control, stereo bridged audio power amplifiers  
and a selectable gain or bass boost, making it optimally  
suited for multimedia monitors, portable radios, desktop, and  
portable computer applications.  
32Ω  
1.0%(typ)  
0.5µA (typ)  
n Shutdown current  
Features  
n Improved click and pop circuitry virtually eliminates  
noise during turn on/off transitions  
n DC Volume Control Interface  
n System Beep Detect  
n Stereo switchable bridged/single-ended power amplifiers  
n Selectable internal/external gain and bass boost  
n Thermal shutdown protection circuitry  
n Unity gain stable  
The LM4938 features an externally controlled, low-power  
consumption shutdown mode, and both a power amplifier  
and headphone mute for maximum system flexibility and  
performance.  
Note 1: When properly mounted to the circuit board, LM4938MH will deliver  
2W into 4. See Application Information section Exposed-DAP package  
PCB Mounting Considerations for more information.  
Note 2: An LM4938MH that has been properly mounted to the circuit board  
and forced-air cooled will deliver 2.2W into 3.  
Applications  
n Flat Panel Displays  
n Portable and Desktop Computers  
n Multimedia Monitors  
n Portable Radios, PDAs, and Portable TVs  
Block Diagram  
20095601  
FIGURE 1. LM4938 Block Diagram  
Boomer® is a registered trademark of NationalSemiconductor Corporation.  
© 2005 National Semiconductor Corporation  
DS200956  
www.national.com  

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