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参数资料
| 型号： | LM4901IBP |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.05 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封装： | MICRO, SMD-9 |
| 文件页数： | 1/21页 |
| 文件大小： | 1074K |
| 代理商： | LM4901IBP |
LM4901
1 Watt Audio Power Amplifier with Selectable Shutdown
Logic Level
General Description
The LM4901 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 LM4901 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 LM4901 features a low-power consumption shutdown
mode. To facilitate this, Shutdown may be enabled by either
logic high or low depending on mode selection. Driving the
shutdown mode pin either high or low enables the shutdown
pin to be driven in a likewise manner to enable shutdown.
The LM4901 contains advanced pop & click circuitry which
eliminates noise which would otherwise occur during turn-on
and turn-off transitions.
The LM4901 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
1.0W(typ.)
j Power Output at 3.0V & 1% THD
375mW(typ.)
j Shutdown Current
0.1A(typ.)
Features
n
Available in space-saving packages: micro SMD and
MSOP
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
n
User select shutdown High or Low
Applications
n
Mobile Phones
n
PDAs
n
Portable electronic devices
Typical Application
Boomer is a registered trademark of National Semiconductor Corporation.
DS200198-1
FIGURE 1. Typical Audio Amplifier Application Circuit
December 2001
LM4901
1
W
att
Audio
Power
Amplifier
with
Selectable
Shutdown
Logic
Level
2001 National Semiconductor Corporation
DS200198
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LM4901MM/NOPB | 1.6 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| LM4901LD/NOPB | 1.6 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| LM4902LDX/NOPB | 0.675 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| LM4902LD/NOPB | 0.675 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| LM4902MMX/NOPB | 0.675 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4901IBPX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:AUDIO AMPLIFIER|SINGLE|BGA|8PIN|PLASTIC |
| LM4901LD | 制造商:未知厂家 制造商全称:未知厂家 功能描述:AUDIO AMPLIFIER|SINGLE|LLCC|10PIN|PLASTIC |
| LM4901LD/NOPB | 功能描述:IC AMP AUDIO PWR 1.6W MONO 10LLP 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) |
| LM4901LDX/NOPB | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1.6W Class-AB 10-Pin LLP EP T/R |
| LM4901MM | 制造商:Texas Instruments 功能描述:AMP AUDIO POWER 1W SMD LLP-16 |
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