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LM4938MHX PDF预览

LM4938MHX

更新时间: 2024-09-27 20:05:55
品牌 Logo 应用领域
美国国家半导体 - NSC 光电二极管商用集成电路
页数 文件大小 规格书
26页 1624K
描述
IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28, Audio Control IC

LM4938MHX 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

LM4938MHX 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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