The LM4809 is a dual audio power amplifier capable of delivering 105mW per channel of continuous average power into a 16 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 16 0.1% (typ)
• THD+N at 1kHz at 70mW Continuous Average Power into 32 0.1% (typ)
• Shutdown Current 0.4A (typ)

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• Output power (W)
• 0.105
• Analog supply (Min) (V)
• 2
• Analog supply (Max) (V)
• 5.5
• PSRR (dB)
• 70
• Rating
• Catalog
• Operating temperature range (C)
• -40 to 85
• Headphone channels
• Stereo
• Volume control
• No
• Shutdown current (ISD) (uA)
• 0.4
• Architecture
• Class-AB
• Iq per channel (Typ) (mA)
• 0.7

LM4809的完整型号有：LM4809LDX/NOPB、LM4809MM/NOPB、LM4809MMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM4809LDX/NOPB，工作温度：-40 to 85，封装：WSON (NGL)-8，包装数量MPQ：4500个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM4809LDX/NOPB的批量USD价格：.449（1000+）

LM4809MM/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LM4809MM/NOPB的批量USD价格：.539（1000+）

LM4809MMX/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LM4809MMX/NOPB的批量USD价格：.449（1000+）

LM4809MBD LM4809M 评估模块

The LM4809 is a dual audio power amplifier capable of delivering 105mW per channel of continuous average power into a 16 load with 0.1% (THD+N) from a 5V power supply. This LM4809MBD is an evaluation board designed to ease the evaluation and effort during the development of a circuit using the (...)

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