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LM4951 PDF预览

LM4951

更新时间: 2024-01-16 08:30:50
品牌 Logo 应用领域
美国国家半导体 - NSC 音频放大器
页数 文件大小 规格书
18页 1116K
描述
Wide Voltage Range 1.8 Watt Audio Amplifier

LM4951 技术参数

是否Rohs认证: 符合生命周期:Obsolete
包装说明:FBGA, BGA9,3X3,20Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.33.00.01
Factory Lead Time:1 week风险等级:5.42
商用集成电路类型:AUDIO AMPLIFIERJESD-30 代码:S-PBGA-B9
JESD-609代码:e1湿度敏感等级:1
功能数量:1端子数量:9
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:FBGA
封装等效代码:BGA9,3X3,20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:3.3/7.5 V认证状态:Not Qualified
子类别:Audio/Video Amplifiers最大压摆率:4.5 mA
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:0.5 mm端子位置:BOTTOM
处于峰值回流温度下的最长时间:NOT SPECIFIEDBase Number Matches:1

LM4951 数据手册

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November 2005  
LM4951  
Wide Voltage Range 1.8 Watt Audio Amplifier  
General Description  
Key Specifications  
The LM4951 is an audio power amplifier primarily designed  
for demanding applications in Portable Handheld devices. It  
is capable of delivering 1.8W mono BTL to an 8load,  
continuous average power, with less than 1% distortion  
(THD+N) from a 7.5VDC power supply.  
j
Wide Voltage Range  
Quiescent Power Supply Current  
(VDD = 7.5V)  
2.7V to 9V  
j
2.5mA (typ)  
1.8W (typ)  
j
Power Output BTL at 7.5V,  
1% THD  
Boomer audio power amplifiers were designed specifically to  
provide high quality output power with a minimal amount of  
external components. The LM4951 does not require boot-  
strap capacitors, or snubber circuits.  
j
j
Shutdown Current  
0.01µA (typ)  
25mS (typ)  
Fast Turn on Time  
The LM4951 features a low-power consumption active-low  
shutdown mode. Additionally, the LM4951 features an inter-  
nal thermal shutdown protection mechanism.  
Features  
n Pop & click circuitry eliminates noise during turn-on and  
turn-off transitions  
The LM4951 contains advanced pop & click circuitry that  
eliminates noises which would otherwise occur during  
turn-on and turn-off transitions.  
n Low current, active-low shutdown mode  
n Low quiescent current  
n Thermal shutdown protection  
n Unity-gain stable  
The LM4951 is unity-gain stable and can be configured by  
external gain-setting resistors.  
n External gain configuration capability  
Applications  
n Portable Handheld Devices up to 9V  
n Cell Phone  
n PDA  
Typical Application  
200942F4  
* RC is needed for over/under voltage protection. If inputs are less than VDD +0.3V and greater than –0.3V, and if inputs are  
disabled when in shutdown mode, then RC may be shorted.  
FIGURE 1. Typical Bridge-Tied-Load (BTL) Audio Amplifier Application Circuit  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2005 National Semiconductor Corporation  
DS200942  
www.national.com  

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