LM4873 Series

2.4-W, stereo, analog input Class-AB audio amplifier

Catalog

2.4-W, stereo, analog input Class-AB audio amplifier

Part	Package / Case	Mounting Type	Output Type	Max Output Power x Channels @ Load	Type	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Features	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case [y]	Package / Case [x]	Package / Case [custom]	Package / Case [custom]
Texas Instruments LM4873LQX	24-WFQFN Exposed Pad	Surface Mount	2-Channel (Stereo) with Stereo Headphones	3 W 440 mW	Class AB	24-WQFN (4x5)	85 °C	-40 °C	Depop Input Multiplexer Shutdown Thermal Protection	5.5 V	2 V
Texas Instruments LM4873MTE/NOPB
Texas Instruments LM4873IBL	20-TFBGA DSBGA	Surface Mount	2-Channel (Stereo) with Stereo Headphones	3 W 440 mW	Class AB	20-DSBGA	85 °C	-40 °C	Depop Input Multiplexer Shutdown Thermal Protection	5.5 V	2 V
Texas Instruments LM4873MT/NOPB	20-TSSOP	Surface Mount	2-Channel (Stereo) with Stereo Headphones	3 W 440 mW	Class AB	20-TSSOP	85 °C	-40 °C	Depop Input Multiplexer Shutdown Thermal Protection	5.5 V	2 V	4.4 mm	0.173 in
Texas Instruments LM4873MTEX-1	28-PowerTSSOP	Surface Mount	2-Channel (Stereo) with Stereo Headphones	3 W 440 mW	Class AB	28-HTSSOP	85 °C	-40 °C	Depop Input Multiplexer Shutdown Thermal Protection	5.5 V	2 V			4.4 mm	0.173 "
Texas Instruments LM4873MTX	20-TSSOP	Surface Mount	2-Channel (Stereo) with Stereo Headphones	3 W 440 mW	Class AB	20-TSSOP	85 °C	-40 °C	Depop Input Multiplexer Shutdown Thermal Protection	5.5 V	2 V	4.4 mm	0.173 in

Catalog

2.4-W, stereo, analog input Class-AB audio amplifier

Key Features

• Input Mux Control and Two Separate Inputs Per ChannelStereo Headphone Amplifier Mode"Click and Pop" Suppression CircuitryThermal Shutdown Protection CircuitryPCB Area-Saving DSBGA and Thin DSBGA PackagesTSSOP and HTSSOP and WQFN PackagesKey SpecificationsPOat 1% THD+NLM4873LQ, 3Ω, 4Ω Loads 2.4W (typ), 2.1 W (typ)LM4873MTE-1, 3Ω, 4Ω loads 2.4W (typ), 2.1 W (typ)LM4873IBL, 8Ω Load 1.1 W (typ)LM4873MTE, 4Ω 1.9 W (typ)LM4873, 8Ω 1.1 W (typ)Single-Ended Mode THD+N at 75 mW Into 32Ω 0.5 % (max)Shutdown Current 0.7 µA (typ)Supply Voltage Range 2 to 5.5 VAll trademarks are the property of their respective owners.Input Mux Control and Two Separate Inputs Per ChannelStereo Headphone Amplifier Mode"Click and Pop" Suppression CircuitryThermal Shutdown Protection CircuitryPCB Area-Saving DSBGA and Thin DSBGA PackagesTSSOP and HTSSOP and WQFN PackagesKey SpecificationsPOat 1% THD+NLM4873LQ, 3Ω, 4Ω Loads 2.4W (typ), 2.1 W (typ)LM4873MTE-1, 3Ω, 4Ω loads 2.4W (typ), 2.1 W (typ)LM4873IBL, 8Ω Load 1.1 W (typ)LM4873MTE, 4Ω 1.9 W (typ)LM4873, 8Ω 1.1 W (typ)Single-Ended Mode THD+N at 75 mW Into 32Ω 0.5 % (max)Shutdown Current 0.7 µA (typ)Supply Voltage Range 2 to 5.5 VAll trademarks are the property of their respective owners.

Description

The LM4873 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4Ω load or 2.4W to a 3Ω load with less than 1.0% THD+N (see Notes below). In addition, the headphone input pin allows the amplifiers to operate in single-ended mode when driving stereo headphones. A MUX control pin allows selection between the two stereo sets of amplifier inputs. The MUX control can also be used to select two different closed-loop responses. Boomer audio power amplifiers were designed specifically to provide high quality output power from a surface mount package while requiring few external components. To simplify audio system design, the LM4873 combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip. The LM4873 features an externally controlled, low-power consumption shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection. It also utilizes circuitry to reduce "clicks and pops" during device turn-on. Note:An LM4873MTE-1, LM4873MTE, or LM4873LQ that has been properly mounted to a circuit board will deliver 2.1W into 4Ω. The other package options for the LM4873 will deliver 1.1W into 8Ω. See the sections for further information concerning the LM4873MTE-1, LM4873MTE, and the LM4873LQ. Note:An LM4873MTE-1, LM4873MTE, or LM4873LQ that has been properly mounted to a circuit board and forced-air cooled will deliver 2.4W into 3Ω. The LM4873 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4Ω load or 2.4W to a 3Ω load with less than 1.0% THD+N (see Notes below). In addition, the headphone input pin allows the amplifiers to operate in single-ended mode when driving stereo headphones. A MUX control pin allows selection between the two stereo sets of amplifier inputs. The MUX control can also be used to select two different closed-loop responses. Boomer audio power amplifiers were designed specifically to provide high quality output power from a surface mount package while requiring few external components. To simplify audio system design, the LM4873 combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip. The LM4873 features an externally controlled, low-power consumption shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection. It also utilizes circuitry to reduce "clicks and pops" during device turn-on. Note:An LM4873MTE-1, LM4873MTE, or LM4873LQ that has been properly mounted to a circuit board will deliver 2.1W into 4Ω. The other package options for the LM4873 will deliver 1.1W into 8Ω. See the sections for further information concerning the LM4873MTE-1, LM4873MTE, and the LM4873LQ. Note:An LM4873MTE-1, LM4873MTE, or LM4873LQ that has been properly mounted to a circuit board and forced-air cooled will deliver 2.4W into 3Ω.