LM4871 ,3W Audio Power Amplifier with Shutdown ModeGeneral Description Key Specificationsn PO at 10% THD+N, 1kHzThe LM4871 is a mono bridged audio pow ..
LM4871LD ,3W Audio Power Amplifier with Shutdown ModeFeaturesfew external components and operate on low supply volt-n No output coupling capacitors, boo ..
LM4871LD ,3W Audio Power Amplifier with Shutdown ModeGeneral Description Key Specificationsn PO at 10% THD+N, 1kHzThe LM4871 is a mono bridged audio pow ..
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LP2982IM5X-3.6 ,Micropower 50 mA Ultra Low-Dropout Regulator in SOT-23 and micro SMD PackagesFeaturesn Ultra low dropout voltageThe LP2982 is a 50 mA, fixed-output voltage regulator de-signedt ..
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LM4871
3W Audio Power Amplifier with Shutdown Mode
LM4871 Audio Power Amplifier with Shutdown Mode
General DescriptionThe LM4871isa mono bridged audio power amplifier ca-
pableof delivering 3Wof continuous average power intoa load with less than 10% THD when poweredbya5V
power supply (Note1).To conserve powerin portable appli-
cations, the LM4871’s micropower shutdown mode (IQ=
0.6μA, typ)is activated when VDDis appliedto the SHUT-
DOWN pin.
Boomer audio power amplifiers are designed specificallyto
provide high power, high fidelity audio output. They require
few external components and operateon low supply volt-
ages from 2.0Vto 5.5V. Sincethe LM4871 doesnot require
output coupling capacitors, bootstrap capacitors,or snubber
networks,itis ideally suitedfor low-power portable systems
that require minimum volume and weight.
Additional LM4871 features include thermal shutdown pro-
tection, unity-gain stability, and external gain set.
Note1:An LM4871LDthat hasbeen properlymountedtoa circuit boardwill
deliver3Winto3Ω(at 10% THD).The other package optionsforthe LM4871
will deliver 1.5Winto8Ω(at 10% THD). Seethe
Application Informationsectionsfor further information concerningthe LM4871LD, LM4871MM,
LM4871M,andthe LM4871N.
Key Specifications POat 10% THD+N, 1kHz LM4871LD:3Ω ,4Ω loads 3W (typ), 2.5W (typ) All other LM4871 packages:8Ω load 1.5W (typ) Shutdown current 0.6μA (typ) Supply voltage range 2.0Vto 5.5V THDat 1kHzat 1W continuous average output power
into8Ω 0.5% (max)
Features No output coupling capacitors, bootstrap capacitors,or
snubber circuits required Unity-gain stable LLP, MSOP, SO,or DIP packaging External gain configuration capability Pin compatible with the LM4861
Applications Portable computers Desktop computers Low voltage audio systems
Typical Application Connection DiagramDS100008-1
FIGURE1. Typical Audio Amplifier Application Circuit
MSOP, Small Outline, and DIP PackageDS100008-2
Top View
Order Number LM4871MM, LM4871M,or LM4871N
SeeNS Package Number MUA08A, M08A,or N08E
LLP PackageDS100008-39
Top View
Order Number LM4871LD
See NS Package Number LDC08AOctober 2000
LM4871
Audio
Power
Amplifier
with
Shutdown
Mode
