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.

产品特性
  • 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)
参数parametrics
参数LM4809
Output Power (W)0.105
PSRR (dB)70
RatingCatalog
Operating Temperature Range (C)-40 to 85
Approx. Price (US$)0.37 | 1ku
Headphone ChannelsStereo
Shutdown Current (ISD) (uA)0.4
数据表 (1)
标题类型大小 (KB)日期
LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown ModePDF18392013年 4月 5日
应用手册 (2)
标题类型大小 (KB)日期
AN-1849 An Audio Amplifier Power Supply DesignPDF18582013年 5月 1日
Guidelines for Measuring Audio Power Amplifier PerformancePDF7652001年 10月 30日
设计套件与评估板 (1)
培训内容型号类型
LM4809M 评估模块LM4809MBD评估模块和开发板
订购型号
型号试生产 / 生产材料状态温度(oC)价格(美元) | Quantity封装 | 引脚器件标记封装数量 | 载体
LM4809LDX/NOPB生产ACTIVE-40 to 850.42 | 1kuWSON (NGL)G094500 | LARGE T&R
LM4809MM/NOPB生产ACTIVE-40 to 850.42 | 1kuVSSOP (DGK)G091000 | LARGE T&R
LM4809MMX/NOPB生产ACTIVE-40 to 850.42 | 1kuVSSOP (DGK)G093500 | LARGE T&R
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
LM4809