WMSIC Electronic Components

HGSEMI LM4890M/TR LM4890M

ModelLM4890M/TR
PackageSOP-8
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 LM4890M / TR
Type
HGSEMI
Minimum package
2500 编带

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
LM4890M/TR
Electronic Component
1
Package
SOP-8
Electronic Component
Audio Power Amplifier
Electronic Component
0.22g
Electronic Component
1
Features
Switch
Electronic Component
BM0264336356
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
2500

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

LM4890M/TR 产品概述

一、概述

LM4890M/TR 是华冠(HGSEMI)面向便携式通信设备(例如手机、无线手持设备)设计的一款单声道音频功率放大器。器件封装为 SOP-8,采用极少外部元件便可实现高品质音频输出,适合对尺寸、功耗和启动噪声有严格要求的便携产品。

二、主要性能参数

  • 通道数:单声道
  • 输出功率:在 5.2V 电源时对 8Ω 负载可提供 1.2W 持续平均功率;在 3V 电源时对 8Ω 负载可提供约 350mW。
  • 总谐波失真+噪声(THD+N):典型值 0.123%,在 5.2V 工作点下保证小于 1%(测试条件有关)。
  • 静态电流(Iq):2.5mA(低功耗待机/工作基线电流)。
  • 电源纹波抑制比(PSRR):-63dB(良好的电源噪声抑制能力)。
  • 工作电压:2.5V ~ 5.5V。
  • 功能特性:使能/关断(enable/shutdown)、自动静音/免噪音开关(no-pop/auto-mute)。

三、功能亮点

  • 低功耗设计:静态电流仅 2.5mA,适合电池供电的便携设备,延长待机续航。
  • 免噪声启动/关闭:集成自动静音功能,有效消除开关过程中的爆音/点击声,改善用户体验。
  • 宽供电范围:2.5V 到 5.5V 的供电兼容性覆盖常见单节/双节锂电池及移动平台。
  • 优良的电源抑制:PSRR 达 -63dB,可在电源有纹波或噪声时仍保持清洁音频输出。

四、典型应用场景

  • 手机与智能终端的听筒/外放扬声器驱动
  • 无线对讲、蓝牙音箱的单声道放大模块
  • 便携式多媒体设备与手持通讯设备中的音频放大器

五、应用设计建议

  • 电源去耦:建议在电源引脚靠近芯片布置陶瓷去耦电容(例如 0.1μF)与电解/钽电容组合,以发挥 PSRR 优势并抑制瞬态。
  • 输入/输出:输入端通常配合耦合电容以阻断直流,输出端按典型应用连接 8Ω 扬声器。
  • 散热考虑:SOP-8 在高功率输出下存在功耗集中,推荐在 PCB 上增加散热铜箔并注意布局以辅助热量扩散,避免长时间大功率输出导致过热。
  • 控制线:使能/关断与静音控制应遵循上电时序,避免在电源不稳定期间反复切换导致异常噪声。

六、封装与订购信息

  • 品牌:HGSEMI(华冠)
  • 型号:LM4890M/TR
  • 封装:SOP-8

LM4890M/TR 在保持极少外部元件和低功耗前提下,能够为便携通讯类设备提供稳定、清晰的音频输出,是对尺寸、能耗和声音质量有综合要求应用的理想选择。若需原理图参考或更多电气特性(例如具体测试条件下的 THD+N 曲线、频响、启动/关断时序),建议查阅器件的详细数据手册或联系供应商获得进一步支持。

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