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参数资料
| 型号： | LM4871MDA |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| 封装： | DIE |
| 文件页数： | 1/15页 |
| 文件大小： | 454K |
| 代理商： | LM4871MDA |
LM4871
3W Audio Power Amplifier with Shutdown Mode
General Description
The LM4871 is a mono bridged audio power amplifier ca-
pable of delivering 3W of continuous average power into a
3
load with less than 10% THD when powered by a 5V
power supply (Note 1). To conserve power in portable appli-
cations, the LM4871’s micropower shutdown mode (I
Q =
0.6A, typ) is activated when V
DD is applied to the SHUT-
DOWN pin.
Boomer audio power amplifiers are designed specifically to
provide high power, high fidelity audio output. They require
few external components and operate on low supply volt-
ages from 2.0V to 5.5V. Since the LM4871 does not require
output coupling capacitors, bootstrap capacitors, or snubber
networks, it is ideally suited for low-power portable systems
that require minimum volume and weight.
Additional LM4871 features include thermal shutdown pro-
tection, unity-gain stability, and external gain set.
Note 1: An LM4871LD that has been properly mounted to a circuit board will
deliver 3W into 3
(at 10% THD). The other package options for the LM4871
will deliver 1.5W into 8
(at 10% THD). See the Application Information
sections for further information concerning the LM4871LD, LM4871MM,
LM4871M, and the LM4871N.
Key Specifications
n
PO at 10% THD+N, 1kHz
n
LM4871LD: 3
,4 loads
3W (typ), 2.5W (typ)
n
All other LM4871 packages: 8
load
1.5W (typ)
n
Shutdown current
0.6A (typ)
n
Supply voltage range
2.0V to 5.5V
n
THD at 1kHz at 1W continuous average output power
into 8
0.5% (max)
Features
n
No output coupling capacitors, bootstrap capacitors, or
snubber circuits required
n
Unity-gain stable
n
LLP, MSOP, SO, or DIP packaging
n
External gain configuration capability
n
Pin compatible with the LM4861
Applications
n
Portable computers
n
Desktop computers
n
Low voltage audio systems
Typical Application
Connection Diagram
Boomer is a registered trademark of National Semiconductor Corporation.
DS100008-1
FIGURE 1. Typical Audio Amplifier Application Circuit
MSOP, Small Outline, and DIP Package
DS100008-2
Top View
Order Number LM4871MM, LM4871M, or LM4871N
See NS Package Number MUA08A, M08A, or N08E
LLP Package
DS100008-39
Top View
Order Number LM4871LD
See NS Package Number LDC08A
October 2000
LM4871
3W
Audio
Power
Amplifier
with
Shutdown
Mode
2000 National Semiconductor Corporation
DS100008
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LM4871MWA | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4871N/NOPB | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PDIP8 |
| LM4872IBPX/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| LM4872IBP/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| LM4873MDC | 1.1 W, 2 CHANNEL, AUDIO AMPLIFIER, UUC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4871MM | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4871MM/NOPB | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4871MMX | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4871MMX/NOPB | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4871MX | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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