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LM4922TLX

更新时间： 2024-01-05 13:09:33
品牌 Logo 应用领域
美国国家半导体 - NSC 放大器商用集成电路
页数 文件大小 规格书
21页 1251K
描述
IC 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA14, BGA-14, Audio/Video Amplifier

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LM4922TLX 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：BGA
包装说明：VFBGA, BGA14,4X4,20针数：14
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.33.00.01风险等级：5.83
商用集成电路类型：AUDIO AMPLIFIERJESD-30 代码：S-PBGA-B14
JESD-609代码：e1长度：1.97 mm
湿度敏感等级：1信道数量：2
功能数量：1端子数量：14
最高工作温度：85 °C最低工作温度：-40 °C
标称输出功率：0.08 W封装主体材料：PLASTIC/EPOXY
封装代码：VFBGA封装等效代码：BGA14,4X4,20
封装形状：SQUARE封装形式：GRID ARRAY, VERY THIN PROFILE, FINE PITCH
峰值回流温度（摄氏度）：260电源：3 V
认证状态：Not Qualified座面最大高度：0.675 mm
子类别：Audio/Video Amplifiers最大压摆率：10 mA
最大供电电压 (Vsup)：4.2 V最小供电电压 (Vsup)：1.6 V
表面贴装：YES技术：CMOS
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 SPECIFIED
宽度：1.97 mmBase Number Matches：1

LM4922TLX 数据手册

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October 2006  
LM4922  
Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW  
Stereo Headphone Amplifier  
General Description  
Key Specifications  
The LM4922 is a ground referenced, fixed-gain audio power  
amplifier capable of delivering 80mW of continuous average  
power into a 16Ω single-ended load with less than 1%  
THD+N from a 3V power supply.  
j
Improved PSRR at 217Hz  
Power Output at VDD = 3V,  
RL = 16Ω, THD % 1%  
Shutdown Current  
70dB (typ)  
j
80mW (typ)  
0.01µA (typ)  
1.5V/V (typ)  
1.6V to 4.2V  
j
j
j
The LM4922 features a new circuit technology that utilizes a  
charge pump to generate a negative reference voltage. This  
allows the outputs to be biased about ground, thereby elimi-  
nating output-coupling capacitors typically used with normal  
single-ended loads.  
Internal Fixed Gain  
Operating Voltage  
The LM4922 features an Automatic Standby Mode circuitry  
(patent pending). In the absence of an input signal, after  
approximately 12 seconds, the LM4922 goes into low cur-  
rent standby mode. The LM4922 recovers into full power  
operating mode immediately after a signal is applied to either  
the left or right input pins. This feature saves power supply  
current in battery operated applications.  
Features  
n Fixed Logic Levels  
n Ground referenced outputs  
n High PSRR  
n Available in space-saving micro SMD package  
n Ultra low current shutdown mode  
n Improved pop & click circuitry eliminates noises during  
turn-on and turn-off transitions  
n No output coupling capacitors, snubber networks,  
bootstrap capacitors, or gain-setting resistors required  
n Shutdown either channel independently  
Boomer audio power amplifiers were designed specifically to  
provide high quality output power with a minimal amount of  
external components. The LM4922 does not require output  
coupling capacitors or bootstrap capacitors, and therefore is  
ideally suited for mobile phone and other low voltage appli-  
cations where minimal power consumption is a primary re-  
quirement.  
Applications  
n Notebook PCs  
n Mobile Phone  
n PDAs  
n Portable electronic devices  
n MP3 Players  
The LM4922 features a low-power consumption shutdown  
mode selectable for either channel separately. This is ac-  
complished by driving either the SD_RC (Shutdown Right  
Channel) or SD_LC (Shutdown Left Channel) (or both) pins  
with logic low, depending on which channel is desired shut-  
down. Additionally, the LM4922 features an internal thermal  
shutdown protection mechanism.  
The LM4922 contains advanced pop & click circuitry that  
eliminates noises which would otherwise occur during  
turn-on and turn-off transitions.  
The LM4922 has an internal fixed gain of 1.5V/V.  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2006 National Semiconductor Corporation  
DS201582  
www.national.com  
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