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LM4951SD

产品分类: 多媒体放大器
厂牌: TEXAS INSTRUMENTS
产品描述: 0.35%@ 8Ω @ 600mW,0.07%@ 8Ω @ 100mW 1-Channel (Mono) 2.7V 1.8*1 @ 8Ω 9V Class-AB SON 贴片安装
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TEXAS INSTRUMENTS 多媒体放大器 LM4951SD

LM4951SD概述

    # National Semiconductor LM4951 Wide Voltage Range 1.8 Watt Audio Amplifier
    Product Introduction
    The LM4951 is a highly efficient wide voltage range audio power amplifier specifically designed for portable handheld devices. It boasts a robust design with low power consumption, making it ideal for battery-operated applications. This amplifier is capable of delivering 1.8 watts of continuous average power to an 8Ω load at a 7.5VDC supply, maintaining a distortion level (THD+N) of less than 1%. Key advantages include its ability to work across a wide voltage range (2.7V to 9V) and minimal external component requirements, allowing for space-efficient designs.
    Technical Parameters
    General Specifications:
    - Power Supply Voltage: 2.7V to 9V
    - Output Power: 1.8W (mono BTL, 8Ω load, THD+N < 1%)
    - Standby Current: 0.01µA (typ)
    - Wake-Up Time: 25ms (typ)
    - Thermal Shutdown Temperature: 150°C (max)
    Detailed Specifications:
    | Parameter | Condition | Typical (Limit) |
    |
    | Quiescent Current (IDD) | VIN = 0V, IO = 0A, RL = 8Ω | 2.5mA (max 4.5mA) |
    | Offset Voltage (VOS) | - | 5-30mV (max) |
    | Power Supply Rejection Ratio (PSRR) | VRIPPLE = 200mVp-p, f = 217Hz | 66-71dB (min) |
    The LM4951 supports efficient power output while minimizing external components, such as bootstrap capacitors or snubber circuits. Its excellent thermal management ensures reliable operation even under prolonged usage.
    Product Features and Advantages
    The LM4951 offers several key features and benefits:
    - Pop & Click Circuitry: Eliminates unwanted noises during power-on/off transitions.
    - Active-Low Shutdown Mode: Enables ultra-low standby current (0.01µA typ).
    - Thermal Shutdown Protection: Prevents overheating and protects against long-term damage.
    - Unity-Gain Stability: Can be configured for various gains using external resistors.
    - Low Quiescent Current: Ideal for portable devices requiring extended battery life.
    Its market competitiveness lies in its high-quality output, minimal component count, and flexibility across a wide voltage spectrum. These attributes make it an ideal choice for consumer electronics like cell phones and PDAs.
    Application Cases and Usage Recommendations
    Typical Application:
    The LM4951 is commonly used in portable handheld devices where audio quality and low power consumption are critical. For instance, it can serve as the core audio amplifier in smartphones or tablets, driving a pair of speakers in bridge-tied-load (BTL) configuration.
    Example Use Case:
    A smartphone manufacturer might integrate the LM4951 to handle mono audio output for speakerphone functionality or to drive earpiece speakers.
    Usage Suggestions:
    - Ensure correct selection of input and feedback resistors to achieve desired gains without introducing instability.
    - Proper bypassing of power supplies with 1.0µF tantalum capacitors, ensuring they are located close to the IC's supply pins.
    - Monitor output power and ambient temperature to avoid exceeding the maximum allowable power dissipation.
    Compatibility and Support
    The LM4951 is compatible with a variety of handheld devices operating within the 2.7V to 9V supply voltage range. Texas Instruments provides comprehensive support, including software tools, application notes, and detailed datasheets. Users can access updates and technical documentation via [TI's website](http://www.ti.com/).
    Common Issues and Solutions
    Here are some common issues users might encounter, along with recommended solutions:
    1. Issue: Unwanted clicks during startup.
    - Solution: Ensure proper implementation of the internal pop & click circuitry by correctly connecting the Cchg pin.
    2. Issue: Overheating during prolonged use.
    - Solution: Implement

LM4951SD参数

参数
最小工作供电电压 2.7V
THD + 噪声 0.35%@ 8Ω @ 600mW,0.07%@ 8Ω @ 100mW
输出类型 1-Channel (Mono)
放大器类型 Class-AB
最大输出功率 1.8*1 @ 8Ω
-3db带宽 -
音频-负载阻抗 -
最大工作供电电压 9V
4.1mm(Max)
4.1mm(Max)
750μm(Max)
通用封装 SON
安装方式 贴片安装
零件状态 在售
包装方式 散装,卷带包装

LM4951SD厂商介绍

Texas Instruments(简称TI),是一家总部位于美国德克萨斯州达拉斯的全球性半导体设计与制造公司,成立于1930年。TI是全球领先的模拟技术、数字信号处理和微控制器(MCU)领域的供应商。

主营产品分类:
1. 模拟产品:包括电源管理、信号链和接口产品,广泛应用于工业、汽车、医疗等领域。
2. 嵌入式处理:包括微控制器(MCU)、数字信号处理器(DSP)和处理器,广泛应用于消费电子、工业控制、汽车电子等领域。
3. 无线产品:包括无线通信模块和解决方案,应用于物联网、智能城市、智能家居等领域。
4. 计算器:TI也是知名的计算器制造商,拥有多款科学计算器和图形计算器产品。

应用领域:
TI的产品和技术广泛应用于通信、计算机、消费电子、汽车、工业、医疗等多个领域。

优势:
1. 技术创新:TI在模拟、嵌入式处理和无线通信领域拥有强大的研发实力和专利技术。
2. 产品多样性:TI提供广泛的产品线,满足不同客户的需求。
3. 客户支持:TI在全球设有技术支持中心,为客户提供专业的技术支持和解决方案。
4. 供应链管理:TI拥有强大的供应链管理能力,确保产品的稳定供应和交付。

LM4951SD数据手册

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TEXAS INSTRUMENTS 多媒体放大器 TEXAS INSTRUMENTS LM4951SD LM4951SD数据手册

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