LM4861 Series

1.1-W, mono, analog input Class-AB audio amplifier

Catalog

1.1-W, mono, analog input Class-AB audio amplifier

Part	Operating Temperature [Max]	Operating Temperature [Min]	Max Output Power x Channels @ Load [x]	Max Output Power x Channels @ Load	Supplier Device Package	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Supply [Max]	Voltage - Supply [Min]	Type	Mounting Type	Features	Output Type
Texas Instruments LM4861M	85 °C	-40 °C	1	1.5 W	8-SOIC	8-SOIC	3.9 mm	0.154 in	5.5 V	2 V	Class AB	Surface Mount	Shutdown Thermal Protection	1-Channel (Mono)
Texas Instruments LM4861M/NOPB	85 °C	-40 °C	1	1.5 W	8-SOIC	8-SOIC	3.9 mm	0.154 in	5.5 V	2 V	Class AB	Surface Mount	Shutdown Thermal Protection	1-Channel (Mono)
Texas Instruments LM4861MX	85 °C	-40 °C	1	1.5 W	8-SOIC	8-SOIC	3.9 mm	0.154 in	5.5 V	2 V	Class AB	Surface Mount	Shutdown Thermal Protection	1-Channel (Mono)
Texas Instruments LM4861MX/NOPB	85 °C	-40 °C	1	1.5 W	8-SOIC	8-SOIC	3.9 mm	0.154 in	5.5 V	2 V	Class AB	Surface Mount	Shutdown Thermal Protection	1-Channel (Mono)

Catalog

1.1-W, mono, analog input Class-AB audio amplifier

Key Features

• No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessarySmall Outline (SOIC) packagingCompatible with PC power suppliesThermal shutdown protection circuitryUnity-gain stableExternal gain configuration capabilityKey SpecificationsTHD+N for 1kHz at 1W continuous average output power into 8Ω 1.0% (max)Output power at 10% THD+N at 1kHz into 8Ω 1.5 W (typ)Shutdown Current 0.6µA (typ)All trademarks are the property of their respective owners.No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessarySmall Outline (SOIC) packagingCompatible with PC power suppliesThermal shutdown protection circuitryUnity-gain stableExternal gain configuration capabilityKey SpecificationsTHD+N for 1kHz at 1W continuous average output power into 8Ω 1.0% (max)Output power at 10% THD+N at 1kHz into 8Ω 1.5 W (typ)Shutdown Current 0.6µA (typ)All trademarks are the property of their respective owners.

Description

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. 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.