LM4873MTEX-1 ,Dual 2.1W Audio Amplifier Plus Stereo Headphone FunctionFeaturesThe LM4873
LM4873MTEX-1 ,Dual 2.1W Audio Amplifier Plus Stereo Headphone FunctionLM4873 Dual 2.1W Audio Amplifier Plus Stereo Headphone FunctionOctober 2002LM4873Dual 2.1W Audio Am ..
LM4873MTEX-1 ,Dual 2.1W Audio Amplifier Plus Stereo Headphone FunctionFeaturesThe LM4873
LM4873MTX ,Dual 2.1W Audio Amplifier Plus Stereo Headphone FunctionGeneral Description Key SpecificationsThe LM4873 is a dual bridge-connected audio power ampli-j P a ..
LM4874MH ,2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdownfeatures differential stereo inputs, BTL(bridge- R =8Ω,V = 5.0V, and THD+N = 1% 1.2W (typ)L DDtied ..
LM4874MHX ,2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and ShutdownApplicationsR =3Ω,V = 5.0V, and THD+N = 1% 2.1W (typ)n Notebook computersL DDj BTL output power n P ..
LP2985-30DBVR ,Single Output LDO, 150mA, Fixed(3.0V), 1.5% Tolerance, Low Quiescent Current, Low Noise 5-SOT-23 -40 to 125
LP2985-33DBVR ,13
LP2985-33DBVRG4 ,Single Output LDO, 150mA, Fixed(3.3V), 1.5% Tolerance, Low Quiescent Current, Low Noise 5-SOT-23 -40 to 125
LP2985-33DBVRG4 ,Single Output LDO, 150mA, Fixed(3.3V), 1.5% Tolerance, Low Quiescent Current, Low Noise 5-SOT-23 -40 to 125
LP2985-50DBVTG4 ,Single Output LDO, 150mA, Fixed(5.0V), 1.5% Tolerance, Low Quiescent Current, Low Noise 5-SOT-23 -40 to 125
LP2985A-18DBVR ,13
LM4873IBLX-LM4873LQ-LM4873LQX-LM4873MT-LM4873MTE-LM4873MTE-1-LM4873MTEX-LM4873MTEX-1-LM4873MTX
Dual 2.1W Audio Amplifier Plus Stereo Headphone Function
LM4873
Dual 2.1W Audio Amplifier Plus Stereo Headphone
Function
General DescriptionThe LM4873isa dual bridge-connected audio power ampli-
fier which, when connectedtoa5V supply,will deliver 2.1W
toa4Ω load (Note1)or 2.4Wtoa3Ω load (Note2) with less
than 1.0% THD+N.In addition, the headphone input pin
allowsthe amplifiersto operatein single-ended mode when
driving stereo headphones.A MUX controlpin allows selec-
tion between the two stereo setsof amplifier inputs. The
MUX control can also be usedto select two different
closed-loop responses.
Boomer audio power amplifiers were designed specificallyto
provide high quality output power froma surface mount
package while requiring few external components.To sim-
plify audio system design,the LM4873 combines dual bridge
speaker amplifiers and stereo headphone amplifierson one
chip.
The LM4873 featuresan externally controlled, low-power
consumption shutdown mode,a stereo headphone amplifier
mode, and thermal shutdown protection.It also utilizes cir-
cuitryto reduce “clicks and pops” during device turn-on.
Note1: An LM4873MTE-1, LM4873MTE,or LM4873LQ thathas been
properly mountedtoa circuit boardwill deliver 2.1Winto4Ω.The other
package optionsforthe LM4873will deliver 1.1Winto8Ω.Seethe Applica-
tion Information sections for further information concerning the
LM4873MTE-1, LM4873MTE,andthe LM4873LQ.
Note2:An LM4873MTE-1, LM4873MTE,or LM4873LQthathas beenprop-
erly mountedtoacircuitboard andforced-aircooledwilldeliver2.4W into3Ω.
Key SpecificationsPOat 1% THD+N
LM4873LQ, 3Ω,4Ω loads 2.4W(typ), 2.1W(typ)
LM4873MTE-1, 3Ω,4Ω loads 2.4W(typ), 2.1W(typ)
LM4873IBL,8Ω load 1.1W(typ)
LM4873MTE,4Ω 1.9W(typ)
LM4873,8Ω 1.1W(typ) Single-ended mode THD+N 75mW into 32Ω
0.5%(max) Shutdown current 0.7µA(typ) Supply voltage range 2Vto 5.5V
Features Input mux control and two separate inputsper channel Stereo headphone amplifier mode “Click and pop” suppression circuitry Thermal shutdown protection circuitry PCB area-saving micro SMD and thin micro SMD
packages TSSOP and exposed-DAP TSSOP and LLP packages
Applications Multimedia monitors Portable and desktop computers Portable audio systems
Connection DiagramsTop View
Order Number LM4873MTE-1
See NS Package Number MXA28Afor Exposed-DAP
TSSOP
Top View
Order Number LM4873MT, LM4873MTE
See NS Package Number MTC20for TSSOP
See NS Package Number MXA20Afor Exposed-DAP
TSSOP
October 2002
LM4873
Dual
2.1W
Audio
Amplifier
Plus
Stereo
Headphone
Function
