主页 音频、触觉与压电 音频放大器 通用音频放大器
主页
音频、触觉与压电
音频放大器
通用音频放大器

LM4991

正在供货

3.0W 单声道、模拟输入 AB 类音频放大器

立即订购
数据表

LM4991

正在供货
数据表 立即订购

产品详情

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Control interface Hardware Output power (W) 3 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.2 THD + N at 1 kHz (%) 0.2 Load (min) (Ω) 3 Analog supply voltage (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Control interface Hardware Output power (W) 3 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.2 THD + N at 1 kHz (%) 0.2 Load (min) (Ω) 3 Analog supply voltage (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -40 to 85
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) WSON (NGN) 8 16 mm² (4 mm × 4 mm)
  • Available in Space-Saving WSON and SOIC Packages
  • Ultra Low Current Shutdown Mode
  • Can Drive Capacitive Loads up to 500pF
  • Improved Click and Pop Circuitry Reduces Noises During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks, Bootstrap Capacitors or Gain-Setting Resistors Required
  • Unity-Gain Stable

Key Specifications

  • Improved PSRR at 217kHz and 1kHz: 64 dB (typ)
  • PO at VDD = 5.0V, 10% THD, 1kHz
    • LM4991LD (only), 3Ω, 4Ω: 3W (typ), 2.5 W (typ)
    • All packages, 8Ω load: 1.5 W (typ)
  • Shutdown current: 0.1µA (typ)

All trademarks are the property of their respective owners.

  • Available in Space-Saving WSON and SOIC Packages
  • Ultra Low Current Shutdown Mode
  • Can Drive Capacitive Loads up to 500pF
  • Improved Click and Pop Circuitry Reduces Noises During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks, Bootstrap Capacitors or Gain-Setting Resistors Required
  • Unity-Gain Stable

Key Specifications

  • Improved PSRR at 217kHz and 1kHz: 64 dB (typ)
  • PO at VDD = 5.0V, 10% THD, 1kHz
    • LM4991LD (only), 3Ω, 4Ω: 3W (typ), 2.5 W (typ)
    • All packages, 8Ω load: 1.5 W (typ)
  • Shutdown current: 0.1µA (typ)

All trademarks are the property of their respective owners.

The LM4991 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3Ω load with less than 10% THD when powered by a 5V power supply (see Note below). To conserve power in portable applications, the LM4991's micropower shutdown mode (ISD = 0.1µA, typ) is activated when VDD is applied to the SHUTDOWN 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 voltages 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 protection, unity-gain stability, and external gain set.

Note: An LM4991LD that has been properly mounted to a circuit board will deliver 3W into 3Ω (at 10% THD). The other package options for the LM4991 will deliver 1.5W into 8Ω (at 10% THD). See the sections for further information concerning the LM4991LD and LM4991M.

The LM4991 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3Ω load with less than 10% THD when powered by a 5V power supply (see Note below). To conserve power in portable applications, the LM4991's micropower shutdown mode (ISD = 0.1µA, typ) is activated when VDD is applied to the SHUTDOWN 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 voltages 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 protection, unity-gain stability, and external gain set.

Note: An LM4991LD that has been properly mounted to a circuit board will deliver 3W into 3Ω (at 10% THD). The other package options for the LM4991 will deliver 1.5W into 8Ω (at 10% THD). See the sections for further information concerning the LM4991LD and LM4991M.
filter 查找其他 通用音频放大器
下载 观看带字幕的视频 视频

技术文档

未找到结果。请清除搜索并重试。
查看全部 1
顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LM4991 3W Audio Power Amplifier with Shutdown Mode 数据表 (Rev. A) 2013-4-5

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

封装 引脚 CAD 符号、封装和 3D 模型
SOIC (D) 8 Ultra Librarian
WSON (NGN) 8 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

订购和质量

推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。

支持和培训

可获得 TI 工程师技术支持的 TI E2E™ 论坛

查看全部论坛主题 查看英文版全部论坛主题

所有内容均由 TI 和社区贡献者按“原样”提供，并不构成 TI 规范。请参阅使用条款。

如果您对质量、包装或订购 TI 产品有疑问，请参阅 TI 支持。​​​​​​​​​​​​​​

视频