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LM4860M-LM4860MX
1 Watt Audio Power Amplifier with Shutdown Mode
LM4860
Series 1W Audio Power Amplifier with Shutdown Mode
General DescriptionThe LM4860isa bridge-connected audio power amplifier
capableof delivering 1Wof continuous average powertoan load with less than1% THD+N overthe audio spectrum
froma5V power supply.
Boomer audio power amplifiers were designed specificallyto
provide high quality output power witha minimal amountof
external components using surface mount packaging. Since
the LM4860 does not require output coupling capacitors,
bootstrap capacitorsor snubber networks,itis optimally
suitedfor low-power portable systems.
The LM4860 featuresan externally controlled, low-power
consumption shutdown mode,as wellasan internal thermal
shutdown protection mechanism.It also includes two head-
phone control inputs anda headphone sense output for
external monitoring.
The unity-gain stable LM4860 canbe configuredby external
gain setting resistorsfor differential gainsofupto10 without
the useof external compensation components. Higher gains
maybe achieved with suitable compensation.
Key Specifications THD+Nat 1W continuous average
output power into 8Ω: 1% (max) Instantaneous peak output power: >2W Shutdown current: 0.6µA (typ)
Features No output coupling capacitors, bootstrap capacitors,or
snubber circuits are necessary Small Outline (SO) packaging Compatible with PC power supplies Thermal shutdown protection circuitry Unity-gain stable External gain configuration capability Two headphone control inputs and headphone sensing
output
Applications Personal computers Portable consumer products Cellular phones Self-powered speakers Toys and games
Typical Application Connection Diagram
Small Outline PackageTop View
Order Number LM4860M
See NS Package Number M16A
FIGURE1. Typical Audio Amplifier Application Circuit
August 2000
LM4860
Audio
Power
Amplifier
with
Shutdown
Mode
