LM4809 具有低电平停机模式的 LM4809 双路 105mW 耳机放大器


The LM4809 is a dual audio power amplifier capable of delivering 105mW per channel of continuous average power into a 16Ω load with 0.1% (THD+N) from a 5V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4809 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.

The unity-gain stable LM4809 can be configured by external gain-setting resistors.

The LM4809 features an externally controlled, active-low, micropower consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.

  • Active-Low Shutdown Mode
  • "Click and Pop" Reduction Circuitry
  • Low Shutdown Current
  • WSON, MSOP, and SOIC Surface Mount Packaging
  • No Bootstrap Capacitors Required
  • Unity-Gain Stable
Key Specifications
  • THD+N at 1kHz at 105mW Continuous Average Power into 16Ω 0.1% (typ)
  • THD+N at 1kHz at 70mW Continuous Average Power into 32Ω 0.1% (typ)
  • Shutdown Current 0.4µA (typ)
THD (%)0.03
Headphone ChannelsStereo
Output Power (W)0.105
Half Power THD + N @ 1 kHz (%) (kHz)0.03
Operating Temperature Range (C)-40 to 85
ISD (uA)0.4
PSRR (dB)70
Pin/Package8VSSOP 8WSON
Approx. Price (US$)0.36 | 1ku
数据表 (1)
标题类型大小 (KB)日期
LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown ModePDF18062013年 4月 5日
应用手册 (3)
标题类型大小 (KB)日期
AN-1849 An Audio Amplifier Power Supply DesignPDF18582013年 5月 1日
Digital ANC Programmer GuidePDF10612013年 1月 25日
Guidelines for Measuring Audio Power Amplifier PerformancePDF7652001年 10月 30日
设计套件与评估板 (2)
LM4809M 评估模块LM4809MBD评估模块和开发板
具有低电平停机模式的 LM4809 双路 105mW 耳机放大器LM4809LQBD评估模块和开发板
型号状态温度 (oC)价格(美元) | Quantity封装 | 引脚器件标记封装数量 | 载体
LM4809LDX/NOPBACTIVE-40 to 850.36 | 1kuWSON (NGL) | 8G094500 | LARGE T&R
LM4809MM/NOPBACTIVE-40 to 850.36 | 1kuVSSOP (DGK) | 8G091000 | LARGE T&R
LM4809MMX/NOPBACTIVE-40 to 850.36 | 1kuVSSOP (DGK) | 8G093500 | LARGE T&R

这里所列出的美国报价单仅供预算参考,指美元报价(规定订量的每片美元,美国离岸价),如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因,国际报价可能不同。对于特殊批量报价,请与BDTIC 联络。对于评估板和套件的报价是指一个单位价格。

LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode LM4809
AN-1849 An Audio Amplifier Power Supply Design TLV320DAC3100-Q1
Guidelines for Measuring Audio Power Amplifier Performance TLV320DAC3100-Q1