The LM4861 is a bridge-connected audio power amplifier capable of delivering 1.1W of continuous average power to an 8Ω load with 1% THD+N using a 5V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. Since the LM4861 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optimally suited for low-power portable systems.

The LM4861 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.

The unity-gain stable LM4861 can be configured by external gain-setting resistors for differential gains of up to 10 without the use of external compensation components. Higher gains may be achieved with suitable compensation.

• No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary
• Small Outline (SOIC) packaging
• Compatible with PC power supplies
• Thermal shutdown protection circuitry
• Unity-gain stable
• External gain configuration capability

Key Specifications

• THD+N for 1kHz at 1W continuousaverage output power into 8 1.0% (max)
• Output power at 10% THD+N at 1kHz into 8 1.5 W (typ)
• Shutdown Current 0.6A (typ)

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• 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
• Load (Min) (ohms)
• 8
• Output power (W)
• 1.6
• THD + N @ 1 kHz (%)
• 0.72
• Iq (Typ) (mA)
• 6.5
• Control interface
• Hardware
• Closed/open loop
• Closed
• Analog supply (Min) (V)
• 2
• Analog supply (Max) (V)
• 5.5
• PSRR (dB)
• 65
• Operating temperature range (C)
• -40 to 85

LM4861的完整型号有：LM4861M、LM4861M/NOPB、LM4861MX、LM4861MX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM4861M，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-1-235C-UNLIM，引脚镀层/焊球材料：SNPB，TI官网LM4861M的批量USD价格：.672（1000+）

LM4861M/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LM4861M/NOPB的批量USD价格：.576（1000+）

LM4861MX，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-1-235C-UNLIM，引脚镀层/焊球材料：SNPB，TI官网LM4861MX的批量USD价格：.576（1000+）

LM4861MX/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LM4861MX/NOPB的批量USD价格：.48（1000+）

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