WMSIC Electronic Components

HGSEMI LM4871DQ2/TR LM4871DQ2

ModelLM4871DQ2/TR
PackageDFN-8(2x2)
BrandHGSEMI
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
HGSEMI LM4871DQ2 / TR
Type
DFN-8(2X2)
Minimum package
4000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
LM4871DQ2/TR
Electronic Component
1
Package
DFN-8(2x2)
Electronic Component
Audio Power Amplifier
Electronic Component
0.138g
Electronic Component
98dB
Electronic Component
1
Power Amplifier Type
AB Power Amplifier
Features
Switch
Electronic Component
BM0265070243
Operating Voltage
2.5V~5.5V
Output Power
2.9Wx1@4Ω;1.8Wx1@8Ω
Static Current(Iq)
2mA
Speaker Channel Count
Electronic Component

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

LM4871DQ2/TR 产品概述

一、产品简介

LM4871DQ2/TR 是一款针对便携与消费类音频设备设计的单声道 AB 类音频功率放大器,额定输出可达 2.9W(4Ω,典型),在 2.5V~5.5V 的单电源供电下工作。器件集成了自动静音/免噪音开关与使能/关断控制,静态电流仅 2mA,适用于对功耗与音质有均衡要求的系统。

二、主要规格

  • 功放类型:AB 类,单声道
  • 输出功率:2.9W x1 @4Ω,1.8W x1 @8Ω(典型)
  • 总谐波失真+噪声(THD+N):0.23%(典型)
  • 静态电流(Iq):2mA(典型)
  • 信噪比(SNR):98dB
  • 电源纹波抑制比(PSRR):80dB
  • 工作电压:2.5V ~ 5.5V
  • 功能:自动静音/免噪声开关;使能/关断功能
  • 封装:DFN-8(2x2),带散热焊盘

三、功能与优势

  • 高效率 AB 类拓扑可在保证线性度的同时提供较高瞬态功率输出,适配 4Ω/8Ω 负载。
  • 低静态电流有利于电池供电产品延长待机寿命。
  • 优秀的 PSRR 与高 SNR 提升在噪声敏感环境下的听感质量。
  • 自动静音/免噪声开关与使能功能便于系统级电源管理与快速上电消噪。

四、典型应用

  • 便携蓝牙音箱、手持媒体播放器
  • 平板/笔记本外放音响、电视与机顶盒前置扬声器
  • 智能家居音频模块、物联网语音终端

五、封装与热设计

DFN-8(2x2)小尺寸有利于高密度 PCB 布局,但需注意功率耗散。建议在 PCB 对应焊盘下方设计充足的散热通孔与铜箔过孔,并将大面积地或电源平面连接到散热焊盘以降低结壳温升,确保在高功率工作点下器件可靠性。

六、布局与外部元件建议

  • 电源去耦:VCC 近端并联 0.1µF 高频陶瓷与 4.7~10µF 低 ESR 电解/陶瓷电容。
  • 输入耦合:使用合适的交流耦合电容及高质量地线,尽量缩短模拟输入线路。
  • 使能/静音控制:通过 MCU 或开关控制 EN/MUTE 引脚,实现快速静音与低噪启动。
  • 扬声器走线应为独立短线,避免与敏感模拟信号并行,以减少回授噪声与 EMI。

七、选型与注意事项

在选型时除关注额定输出功率外,应评估系统实际供电电压、扬声器阻抗以及散热条件;若长期在高 SPL 下工作,需按 PCB 散热策略进行充足热设计。对于要求更低失真或更高输出功率的场合,可考虑更高电压或桥接/立体声解决方案。

以上为 LM4871DQ2/TR 的产品概述与设计建议,可作为系统设计与快速评估的参考。若需详细电气参数、典型应用电路或封装图纸,请提供进一步信息以获得针对性的资料。

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