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参数资料
| 型号： | LM4904ITL/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.07 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| 封装： | MICRO SMD-8 |
| 文件页数： | 1/18页 |
| 文件大小： | 670K |
| 代理商： | LM4904ITL/NOPB |
LM4904
1 Watt Audio Power Amplifier
General Description
The LM4904 is an audio power amplifier primarily designed
for demanding applications in mobile phones and other por-
table communication device applications. It is capable of
delivering 1 watt of continuous average power to an 8
BTL
load with less than 1% distortion (THD+N) from a 5V
DC
power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4904 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.
The LM4904 features a low-power consumption shutdown
mode, which is achieved by driving the shutdown pin with
logic high. Additionally, the LM4904 features an internal ther-
mal shutdown protection mechanism.
The LM4904 contains advanced pop & click circuitry which
eliminates noise which would otherwise occur during turn-on
and turn-off transitions.
The LM4904 is unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
j Improved PSRR at 217Hz & 1KHz
62dB
j Power Output at 5.0V, 1% THD, 8
1.07W (typ)
j Power Output at 3.0V, 1% THD, 4
525mW (typ)
j Power Output at 3.0V, 1% THD, 8
390mW (typ)
j Shutdown Current
0.1A (typ)
Features
n
Available in space-saving micro SMD package
n
Ultra low current shutdown mode
n
BTL output can drive capacitive loads
n
Improved pop & click circuitry eliminates noise during
turn-on and turn-off transitions
n
2.0 - 5.5V operation
n
No output coupling capacitors, snubber networks or
bootstrap capacitors required
n
Unity-gain stable
n
External gain configuration capability
Applications
n
Mobile Phones
n
PDAs
n
Portable electronic devices
Typical Application
Boomer is a registered trademark of National Semiconductor Corporation.
200437B6
FIGURE 1. Typical Audio Amplifier Application Circuit
May 2004
LM4904
1
W
att
Audio
Power
Amplifier
2004 National Semiconductor Corporation
DS200437
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4905 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:1 Watt Audio Power Amplifier |
| LM4905LD | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM4905LD/NOPB | 功能描述:IC AMP AUDIO PWR 1.07W MONO 8LLP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4905LDX | 功能描述:IC AMP AUDIO PWR 1.07W MONO 8LLP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4905LQ | 制造商:Texas Instruments 功能描述:AMP AUDIO POWER 1W SMD LLP-28 |
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