LM4809 Series

105-mW, stereo, analog input headphone amplifier with active-low shutdown mode

Catalog

105-mW, stereo, analog input headphone amplifier with active-low shutdown mode

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Max Output Power x Channels @ Load	Amplifier Type	Utilized IC / Part	Board Type	Output Type	Supplied Contents	Features	Mounting Type	Type	Package / Case	Package / Case [custom]	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package
Texas Instruments LM4809MBD	5.5 V	2 V	2 channels 16 Ohm 105 mW	Class AB	LM4809	Fully Populated	Headphones 2-Channel (Stereo)	Board(s)
Texas Instruments LM4809MM	5.5 V	2 V	2 channels 16 Ohm 105 mW				Headphones 2-Channel (Stereo)		Depop Shutdown Thermal Protection	Surface Mount	Class AB	8-MSOP 8-TSSOP	0.118 in	3 mm	85 °C	-40 °C
Texas Instruments LM4809LDBD	5.5 V	2 V	2 channels 16 Ohm 105 mW	Class AB	LM4809	Fully Populated	Headphones 2-Channel (Stereo)	Board(s)
Texas Instruments LM4809LQ/NOPB	5.5 V	2 V	2 channels 16 Ohm 105 mW				Headphones 2-Channel (Stereo)		Depop Shutdown Thermal Protection	Surface Mount	Class AB	8-WQFN Exposed Pad			85 °C	-40 °C	8-WQFN (2x2)

Catalog

105-mW, stereo, analog input headphone amplifier with active-low shutdown mode

Key Features

• Active-Low Shutdown Mode"Click and Pop" Reduction CircuitryLow Shutdown CurrentWSON, MSOP, and SOIC Surface Mount PackagingNo Bootstrap Capacitors RequiredUnity-Gain StableKey SpecificationsTHD+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)All trademarks are the property of their respective owners.Active-Low Shutdown Mode"Click and Pop" Reduction CircuitryLow Shutdown CurrentWSON, MSOP, and SOIC Surface Mount PackagingNo Bootstrap Capacitors RequiredUnity-Gain StableKey SpecificationsTHD+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)All trademarks are the property of their respective owners.

Description

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. 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.