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LM4865M-LM4865MM-LM4865MMX-LM4865MX
750mW Audio Power Amplifier with DC Volume Control and Headphone Switch
LM4865
750 mW Audio Power Amplifier with DC Volume Control
and Headphone Switch
General DescriptionThe LM4865isa mono bridged audio power amplifier with voltage volume control. The LM4865is capableof deliv-
ering 750mWof continuous average power intoan8Ω load
with less than1% THD when poweredbya5V power supply.
Switching between bridged speaker mode and headphone
(single ended) modeis accomplished using the headphone
sense pin.To conserve powerin portable applications, the
LM4865’s micropower shutdown mode(IQ= 0.7µA, typ)is
activated when less than 300mVis appliedtotheDC Vol/SD
pin.
Boomer audio power amplifiers are designed specificallyto
provide high power audio output while maintaining high fidel-
ity. They require few external components and operateon
low supply voltages.
Applications GSM phones and accessories, DECT, office phones Hand held radio Other portable audio devices
Key Specifications POat 1.0% THD+N into8Ω
SO, micro SMD
750mW (typ) POat 10% THD+N into8Ω
SO, micro SMD (typ) Shutdown current 0.7µA(typ) Supply voltage range 2.7Vto 5.5V
Features DC voltage volume control Headphone amplifier mode “Click and pop” suppression Shutdown control when volume controlpinis low Thermal shutdown protection
Connection Diagrams
micro SMD Package
Small Outline Package (SO)
Mini Small Outline Package (MSOP)Top View
Order Number LM4865IBP
See NS Package Number BPA08CFB
Top View
Order Number LM4865M, LM4865MM
SeeNS Package Number M08A, MUA08A
October 2002
LM4865
Audio
Power
Amplifier
with
olume
Control
and
Headphone
Switch
