LM4927

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SNAS318A – JUNE 2005 – REVISED APRIL 2006

LM4927 Boomer™ Audio Power Amplifier Series 2.5 Watt Fully Differential Audio Power

Amplifier With Shutdown

Check for Samples: LM4927

1

FEATURES

DESCRIPTION

The LM4927 is a fully differential audio power

23

•

Fully Differential Amplification

amplifier

primarily

designed

for

demanding

•

Available in Space-Saving Micro-Array WSON

applications in mobile phones and other portable

Package

communication device applications. It is capable of

•

Ultra Low Current Shutdown Mode

delivering 2.5 watts of continuous average power to a

4

Ω load with less than 10% distortion (THD+N) from

•

Can Drive Capacitive Loads up to 100pF

•

Improved Pop & Click Circuitry Eliminates

Boomer

audio

power

amplifiers

were

designed

Noises During Turn-On and Turn-Off

specifically to provide high quality output power with a

Transitions

minimal

amount

of

external

components.

The

•

2.4 - 5.5V Operation

LM4927 does not require output coupling capacitors

•

No Output Coupling Capacitors, Snubber

or bootstrap capacitors, and therefore is ideally suited

Networks or Bootstrap Capacitors Required

for mobile phone and other low voltage applications

where minimal power consumption is a primary

requirement.

APPLICATIONS

The LM4927 features a low-power consumption

•

Mobile Phones

shutdown mode. To facilitate this, Shutdown may be

•

PDAs

enabled by logic low. Additionally, the LM4927

•

Portable Electronic Devices

features an internal thermal shutdown protection

mechanism.

KEY SPECIFICATIONS

The LM4927 contains advanced pop & click circuitry

•

Improved PSRR at 217Hz, 85dB (Typ)

which eliminates noises which would otherwise occur

during turn-on and turn-off transitions.

•

Power Output at 5.0V @ 10% THD (4

Ω), 2.5W

(Typ)

•

Power Output at 3.3V @ 1% THD, 550mW (Typ)

•

Shutdown Current, 0.1µA (Typ)

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Boomer is a trademark of Texas Instruments.

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All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.