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LM4675TL

更新时间： 2024-11-16 04:20:07
品牌 Logo 应用领域
美国国家半导体 - NSC 放大器功率放大器
页数 文件大小 规格书
19页 925K
描述
Ultra-Low EMI, Filterless, 2.65W, Mono, Class D Audio Power Amplifier with Spread Spectrum

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LM4675TL 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：0.50 MM PITCH, SMD-9Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.16标称带宽：20 kHz
商用集成电路类型：AUDIO AMPLIFIERJESD-30 代码：S-PBGA-B9
JESD-609代码：e0长度：1.514 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：2.7 W封装主体材料：PLASTIC/EPOXY
封装代码：VFBGA封装等效代码：BGA9,3X3,16
封装形状：SQUARE封装形式：GRID ARRAY
电源：2.5/5 V认证状态：Not Qualified
座面最大高度：0.6 mm子类别：Audio/Video Amplifiers
最大压摆率：3.9 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/Lead (Sn63Pb37)
端子形式：BALL端子节距：0.5 mm
端子位置：BOTTOM宽度：1.514 mm
Base Number Matches：1

LM4675TL 数据手册

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August 2006  
LM4675  
Ultra-Low EMI, Filterless, 2.65W, Mono, Class D Audio  
Power Amplifier with Spread Spectrum  
General Description  
Key Specifications  
The LM4675 is a single supply, high efficiency, 2.65W, mono,  
Class D audio amplifier. A spread spectrum, filterless PWM  
architecture reduces EMI and eliminates the output filter,  
reducing external component count, board area consump-  
tion, system cost, and simplifying design.  
j
Efficiency at 3.6V, 400mW into 8Ω speaker 89% (typ)  
j
Efficiency at 3.6V, 100mW into 8Ω speaker 80% (typ)  
j
Efficiency at 5V, 1W into 8Ω speaker  
Quiescent current, 3.6V supply  
Total shutdown power supply current  
Single supply range  
89% (typ)  
2.2mA (typ)  
0.01µA (typ)  
2.4V to 5.5V  
82dB  
j
j
j
j
The LM4675 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 2.2W with  
less than 1% THD+N. Its flexible power supply requirements  
allow operation from 2.4V to 5.5V. The wide band spread  
spectrum architecture of the LM4675 reduces EMI-radiated  
emissions due to the modulator frequency.  
PSRR, f = 217Hz  
Features  
n Spread spectrum architecture reduces EMI  
n Mono Class D Operation  
The LM4675 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 80%, reaching 89% at 400mW output power.  
n No output filter required for inductive loads  
n Externally configurable gain  
n Very fast turn on time: 17µs (typ)  
n Minimum external components  
n "Click and pop" suppression circuitry  
n Micro-power shutdown mode  
The LM4675 features a low-power consumption shutdown  
mode. Shutdown may be enabled by driving the Shutdown  
pin to a logic low (GND).  
The gain of the LM4675 is externally configurable which  
allows independent gain control from multiple sources by  
summing the signals. Output short circuit and thermal over-  
load protection prevent the device from damage during fault  
conditions.  
n Available in space-saving 0.5mm pitch micro SMD and  
LLP packages  
Applications  
n Mobile phones  
n PDAs  
n Portable electronic devices  
20182721  
LM4675 Rf Emissions — 6in cable  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2006 National Semiconductor Corporation  
DS201827  
www.national.com  
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