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LM4670ITL/NOPB PDF预览

LM4670ITL/NOPB

更新时间： 2024-11-16 19:21:59
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
20页 1178K
描述
IC 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9, MICRO, SMD-9, Audio/Video Amplifier

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LM4670ITL/NOPB 技术参数

是否Rohs认证： 符合生命周期：Transferred
包装说明：VFBGA, BGA9,3X3,20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.08标称带宽：20 kHz
商用集成电路类型：AUDIO AMPLIFIER谐波失真：10%
JESD-30 代码：S-PBGA-B9JESD-609代码：e1
长度：1.463 mm湿度敏感等级：1
信道数量：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标称输出功率：3 W
封装主体材料：PLASTIC/EPOXY封装代码：VFBGA
封装等效代码：BGA9,3X3,20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：3/5 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)：5.5 V
最小供电电压 (Vsup)：2.4 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：0.5 mm
端子位置：BOTTOM处于峰值回流温度下的最长时间：40
宽度：1.463 mmBase Number Matches：1

LM4670ITL/NOPB 数据手册

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July 2006  
LM4670  
Filterless High Efficiency 3W Switching Audio Amplifier  
General Description  
Key Specifications  
The LM4670 is a fully integrated single-supply high efficiency  
switching audio amplifier. It features an innovative modulator  
that eliminates the LC output filter used with typical switching  
amplifiers. Eliminating the output filter reduces external com-  
ponent count, simplifies circuit design, and reduces board  
area. The LM4670 processes analog inputs with a delta-  
sigma modulation technique that lowers output noise and  
THD when compared to conventional pulse width modula-  
tors.  
j
Efficiency at 3.6V, 100mW into 8Ω speaker 77% (typ)  
j
Efficiency at 3.6V, 600mW into 8Ω speaker 88% (typ)  
j
Efficiency at 5V, 1W into 8Ω speaker  
Quiescent current, 3.6V supply  
Total shutdown power supply current  
Single supply range  
87% (typ)  
4.8mA (typ)  
0.01µA (typ)  
2.4V to 5.5V  
j
j
j
The LM4670 is designed to meet the demands of mobile  
phones and other portable communication devices. Operat-  
ing on a single 5V supply, it is capable of driving a 4Ω  
speaker load at a continuous average output of 2.3W with  
less than 1% THD+N. Its flexible power supply requirements  
allow operation from 2.4V to 5.5V.  
Features  
n No output filter required for inductive loads  
n Externally configurable gain  
n Very fast turn on time: 1.35ms (typ)  
n Minimum external components  
n "Click and pop" suppression circuitry  
n Micro-power shutdown mode  
n Short circuit protection  
The LM4670 has high efficiency with speaker loads com-  
pared to a typical Class AB amplifier. With a 3.6V supply  
driving an 8Ω speaker, the IC’s efficiency for a 100mW  
power level is 77%, reaching 88% at 600mW output power.  
n Available in space-saving microSMD and LLP packages  
The LM4670 features a low-power consumption shutdown  
mode. Shutdown may be enabled by driving the Shutdown  
pin to a logic low (GND).  
Applications  
n Mobile phones  
n PDAs  
The gain of the LM4670 is externally configurable which  
allows independent gain control from multiple sources by  
summing the signals.  
n Portable electronic devices  
Typical Application  
20089901  
FIGURE 1. Typical Audio Amplifier Application Circuit  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2006 National Semiconductor Corporation  
DS200899  
www.national.com  
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