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  • 制造厂商:TI
  • 产品类别:音频
  • 技术类目:音频放大器 - 扬声器放大器
  • 功能描述:1W 音频功率放大器
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The LM4889 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8? BTL load with less than 2% distortion (THD+N) from a 5VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4889 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

The LM4889 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with a logic low. Additionally, the LM4889 features an internal thermal shutdown protection mechanism.

The LM4889 contains advanced pop & click circuitry to eliminate noise which would otherwise occur during turn-on and turn-off transitions.

The LM4889 is unity-gain stable and can be configured by external gain-setting resistors.

  • Available in Space-Saving VSSOP, SOIC, WSON, and DSBGA Packages
  • Ultra Low Current Shutdown Mode (3.3 to 2.6V - 0.01μA)
  • Can Drive Capacitive Loads up to 500 pF
  • Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
  • Unity-Gain Stable
  • External Gain Configuration Capability
Key Specifications
  • Improved PSRR at 217Hz, 5 - 3.3V 75dB
  • Power Output at 5.0V & 2% THD 1.0W(typ.)
  • Power Output at 3.3V & 1% THD 400mW(typ.)
  • Shutdown Current at 3.3 & 2.6V 0.01μA(typ.)

All trademarks are the property of their respective owners. Boomer is a trademark of Texas Instruments.

  • Audio input type
  • Analog Input
  • Architecture
  • Class-AB
  • Speaker channels (Max)
  • Mono
  • Power stage supply (Max) (V)
  • 5.5
  • Power stage supply (Min) (V)
  • 2.2
  • Load (Min) (ohms)
  • 8
  • Output power (W)
  • 1.2
  • SNR (dB)
  • 93
  • THD + N @ 1 kHz (%)
  • 0.1
  • Iq (Typ) (mA)
  • 5
  • Control interface
  • Hardware
  • Closed/open loop
  • Open
  • Analog supply (Min) (V)
  • 2.2
  • Analog supply (Max) (V)
  • 5.5
  • PSRR (dB)
  • 66
  • Operating temperature range (C)
  • -40 to 85


LM4889MA/NOPB,工作温度:-40 to 85,封装:SOIC (D)-8,包装数量MPQ:95个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM4889MA/NOPB的批量USD价格:.576(1000+)

LM4889MAX/NOPB,工作温度:-40 to 85,封装:SOIC (D)-8,包装数量MPQ:2500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM4889MAX/NOPB的批量USD价格:.48(1000+)

LM4889MM/NOPB,工作温度:-40 to 85,封装:VSSOP (DGK)-8,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM4889MM/NOPB的批量USD价格:.676(1000+)

LM4889MMX/NOPB,工作温度:-40 to 85,封装:VSSOP (DGK)-8,包装数量MPQ:3500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM4889MMX/NOPB的批量USD价格:.58(1000+)


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