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LOWPOWER LPA4890MSF
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- LOWPOWER LPA4890MSF
- Type
- LOWPOWER
- Minimum package
- 3000 个
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- LOWPOWER
- Electronic Component
- LPA4890MSF
- Electronic Component
- 1
- Package
- MSOP-8
- Electronic Component
- Audio Power Amplifier
- Electronic Component
- 0.058g
- Electronic Component
- 1
- Features
- ESD; /; / Switch
- Electronic Component
- BM0229943297
- Operating Voltage
- 2.5V~5.5V
- Output Power
- 1.2Wx1@8Ω
- Static Current(Iq)
- 2.5mA
- Speaker Channel Count
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LPA4890MSF 产品概述
一、产品简介
LPA4890MSF 是微源半导体（LOWPOWER）推出的一款单声道音频功率放大器，工作电压范围宽（2.5V～5.5V），在轻便、小型系统中可提供可靠的音频驱动能力。器件采用 MSOP-8 封装，针对低功耗、低失真便携音频应用优化设计。
二、主要参数与性能亮点
- 输出功率：约 1.2W x1 @ 8Ω（典型测试条件见器件资料表）。
- 总谐波失真+噪声（THD+N）：0.123%，音质保真度高。
- 静态电流（Iq）：2.5mA，适合电池供电的便携设备。
- 输入类型：差分输入，可抑制共模干扰并简化直流隔离设计。
- 电源纹波抑制比（PSRR）：63dB，有利于抑制电源噪声引入音频通道。
三、封装与接口
器件采用 MSOP-8 小型封装，适合空间受限的 PCB 布局。差分输入结构降低了对输入耦合电容的依赖（在满足共模范围时可直接差分驱动），输出端驱动单个扬声器单元。具体引脚排列和功能请参考数据手册。
四、典型应用场景
- 便携蓝牙音箱、迷你音响、智能音箱前置放大；
- 手持设备、玩具、便携媒体播放器；
- 智能家居终端、物联网语音外设；
- 需要低功耗和较好音质的小型电子产品。
五、设计建议与注意事项
- 电源去耦：建议在 VDD 处并联 0.1μF 陶瓷和 1–10μF 低 ESR 电容，靠近器件引脚布置，以获得最佳 PSRR 表现和稳定性。
- 输入连接：优先采用差分驱动以发挥共模抑制优势；若采用单端输入，可使用差分转换电路或按数据手册建议配置输入耦合/偏置元件。
- 输出与扬声器：1.2W 功率输出对封装发热有限制，注意 PCB 散热路径与环境温度，必要时增大铜箔面积。
- 保护与滤波：建议在扬声器端增加小阻抗串联与 RC 抑振网络以抑制高频振铃，并在输入/电源线上考虑 TVS/滤波以增强抗干扰能力。
- 布局要点：缩短信号回路，VDD 和 GND 去耦电容靠近器件，差分输入走线成对且长度匹配，避免大电流回路与敏感信号并行。
六、总结
LPA4890MSF 以其宽电源范围、低静态功耗、良好 PSRR 与较低 THD+N，适用于对尺寸、功耗和音质都有要求的便携与嵌入式音频场景。为获得最佳性能，请按照数据手册的典型应用电路与布局建议进行设计验证。若需要进一步的电气特性曲线或参考电路，请参阅官方 Datasheet 或联系供应商技术支持。
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