您的位置：维库电子市场网 > Datasheet > LM4991MA

LM4991MA Datasheet

  • LM4991MA

  • National Semiconductor [3W Audio Power Amplifier with Shutd...

  • 539.93KB

  • NSC

纠错 0

扫码查看芯片数据手册

上传产品规格书

PDF预览

LM4991 3W Audio Power Amplifier with Shutdown Mode
May 2003
LM4991
3W Audio Power Amplifier with Shutdown Mode
General Description
The LM4991 is a mono bridged audio power amplifier ca-
pable of delivering 3W of continuous average power into a
3鈩?load with less than 10% THD when powered by a 5V
power supply (Note 1). To conserve power in portable appli-
cations, the LM4991鈥檚 micropower shutdown mode (I
SD
=
0.1碌A, 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 2.2V to 5.5V. Since the LM4991 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 LM4991 features include thermal shutdown pro-
tection, unity-gain stability, and external gain set.
Note 1:
An LM4991LD that has been properly mounted to a circuit board will
deliver 3W into 3鈩?(at 10% THD). The other package options for the LM4991
will deliver 1.5W into 8鈩?(at 10% THD). See the
Application Information
sections for further information concerning the LM4991LD and LM4991M.
Key Specifications
n
Improved PSRR at 217kHz and 1kHz
64dB (typ)
n
P
O
at V
DD
= 5.0V, 10% THD, 1kHz
n
LM4991LD (only), 3鈩? 4鈩?/div>
3W (typ), 2.5W (typ)
n
All packages, 8鈩?load
1.5W (typ)
n
Shutdown current
0.1碌A (typ)
Features
Available in space-saving LLP and MA packages
Ultra low current shutdown mode
Can drive capacitive loads up to 500pF
Improved pop & click circuitry reduces noises during
turn-on and turn-off transitions
n
2.2 - 5.5V operation
n
No output coupling capacitors, snubber networks,
bootstrap capacitors or gain-setting resistors required
n
Unity-gain stable
n
n
n
n
Applications
n
n
n
n
Wireless and cellular handsets
PDA鈥檚
Portable computers
Desktop computers
Connection Diagrams
Small Outline Package
LLP Package
20074002
Top View
Order Number LM4991MA
See NS Package Number M08A
20074039
Top View
Order Number LM4991LD
See NS Package Number LDC08A
Boomer
庐
is a registered trademark of National Semiconductor Corporation.
漏 2003 National Semiconductor Corporation
DS200740
www.national.com

LM4991MA 产品属性

  • National Semiconductor (TI)

  • Class-AB

  • 1.5 W x 1 at 8 Ohms

  • 1-Channel Mono

  • 0.2 %

  • 3 V, 5 V

  • + 85 C

  • SMD/SMT

  • SOIC-8 Narrow

  • Tube

  • 8 Ohms

  • Single

  • - 40 C

  • Differential

  • Single

  • 5.5 V

  • 2.2 V

LM4991MA相关型号PDF文件下载

  • 型号
    版本
    描述
    厂商
    下载
  • LM494
    英文版
    Pulse Width Modulated Control Circuit
    NSC
    LM494
  • LM494
    英文版
    Pulse Width Modulated Control Circuit
    national
    LM494
  • LM4900
    英文版
    265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mod...
    NSC
    LM4900
  • LM4900
    英文版
    265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mod...
    NATIONAL
    LM4900
  • LM4901
    英文版
    ETC
    LM4901
  • LM4901
    英文版
    1.6 Watt Audio Power Amplifier with Selectable Shutdown Logi...
    NSC
    LM4901
  • LM4901
    英文版
    1.6 Watt Audio Power Amplifier with Selectable Shutdown Logi...
    NATIONAL
    LM4901
  • LM4902
    英文版
    265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mod...
    NSC
    LM4902
  • LM4902
    英文版
    265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mod...
    NATIONAL
    LM4902
  • LM4903
    英文版
    1 Watt Audio Power Amplifier
    NSC
    LM4903
  • LM4903
    英文版
    1 Watt Audio Power Amplifier
    NATIONAL
    LM4903
  • LM4904
    英文版
    1 Watt Audio Power Amplifier
    NSC
    LM4904
  • LM4904
    英文版
    1 Watt Audio Power Amplifier
    NATIONAL
    LM4904
  • LM4905
    英文版
    1 Watt Audio Power Amplifier
    NSC
    LM4905
  • LM4905
    英文版
    1 Watt Audio Power Amplifier
    LM4905
  • LM4906
    英文版
    1W, Bypass-Capacitor-less Audio Amplifier with Internal Sele...
    NSC
    LM4906
  • LM4906
    英文版
    1W, Bypass-Capacitor-less Audio Power Amplifier with Interna...
    LM4906
  • LM4907
    英文版
    National Semiconductor [1 Watt Audio Power Amplifier]
    NSC
    LM4907
  • LM4908
    英文版
    10kV ESD Rated, Dual 120 mW Headphone Amplifier
    NSC
    LM4908
  • LM4908
    英文版
    LM4908 10kV ESD Rated Dual 120mW Headphone Amplifier
    NATIONAL
    LM4908

您可能感兴趣的PDF文件资料

热门IC型号推荐

©2025 维库电子市场网（www.dzsc.com）　备案号：浙B2-20050339-1 经营许可证：浙B2-20210386版权声明
买家服务热线：0571-85317607 | 买家服务部QQ： QQ:1609526468
卖家服务热线：0571-85317607 | 卖家服务部QQ： QQ:331652727

扫码下载APP，
一键连接广大的电子世界。

在线人工客服

买家服务：
卖家服务：
技术客服：

0571-85317607

网站技术支持

13606545031

客服在线时间周一至周五
9:00-17:30

关注官方微信号，
第一时间获取资讯。

建议反馈
返回顶部

建议反馈

联系人：

联系方式：

按住滑块，拖拽到最右边
>>
感谢您向阿库提出的宝贵意见，您的参与是维库提升服务的动力！意见一经采纳，将有感恩红包奉上哦！

PDF纠错X

投诉电话：0571-85317607 投诉QQ：

如选匿名将无法为您反馈投诉结果，建议实名投诉！