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LM4899LD
1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain
LM4899 Watt Fully Differential Audio Power Amplifier With
Shutdown Select and Fixed 6dB Gain
General DescriptionThe LM4899isa fully differential audio power amplifier
primarily designedfor demanding applicationsin mobile
phones and other portable communication device applica-
tions.Itis capableof delivering1 wattof continuous average
powertoan8Ω load with less than 1% distortion (THD+N)
froma 5VDC power supply.
Boomer audio power amplifiers were designed specificallyto
provide high quality output power witha minimal amountof
external components. The LM4899 doesnot require output
coupling capacitorsor bootstrap capacitors, and thereforeis
ideally suitedfor mobile phone and other low voltage appli-
cations where minimal power consumptionisa primaryre-
quirement.
The LM4899 featuresa low-power consumption shutdown
mode.To facilitate this, Shutdown maybe enabledby either
logic highor low dependingon mode selection. Driving the
shutdown modepin either highor low enablesthe shutdown
selectpintobe drivenina likewise mannerto enable Shut-
down. Additionally, the LM4899 featuresan internal thermal
shutdown protection mechanism.
The LM4899 contains advanced pop& click circuitry which
virtually eliminates noises which would otherwise occur dur-
ing turn-on and turn-off transitions.
The LM4899 hasan internally fixed gainof 6dB.
Key Specifications Improved PSRRat 217Hz 83dB Power Outputat 5.0V& 1% THD 1.0W(typ.) Power Outputat 3.3V& 1% THD 400mW(typ.) Shutdown Current 0.1µA(typ.)
Features Fully differential amplification Internal-gain-setting resistors Availablein space-saving packages micro SMD, MSOP
and LLP Ultra low current shutdown mode Can drive capacitive loadsupto 500pF Improved pop& click circuitry which virtually eliminates
noises during turn-on and turn-off transitions 2.4- 5.5V operation No output coupling capacitors, snubber networksor
bootstrap capacitors required Shutdown highor low selectivity
Applications Mobile phones PDAs Portable electronic devices
Connection Diagrams Bump micro SMD Package 9 Bump micro SMD Marking200645A0
Top View
Order Number LM4899ITL, LM4899ITLX
SeeNS Package Number TLA09AAA200645C7
- Date Code- Die Run Traceability- Boomer Family- LM4899ITLJuly 2003
LM4899
att
Fully
Differential
Audio
Power
Amplifier
ith
Shutdown
Select
and
Fixed
6dB
Gain
