LM4954

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SNAS292B – JUNE 2005 – REVISED APRIL 2013

LM4954 Boomer™ Audio Power Amplifier Series High Voltage 3 Watt Audio Power

Amplifier

Check for Samples: LM4954

1

FEATURES

DESCRIPTION

The LM4954 is an audio power amplifier primarily

23

•

No Output Coupling Capacitors, Snubber

designed

for

demanding

applications

in

mobile

Networks or Bootstrap Capacitors Required

phones and other portable communication device

•

Unity Gain Stable

applications. It is capable of delivering 2.4 Watts of

•

Externally Configurable Gain

continuous average power to an 8

Ω BTL load with

less than 1% THD+N from a 7VDC power supply.

•

Ultra Low Current Active Low Shutdown Mode

Boomer

audio

power

amplifiers

are

designed

•

BTL Output can Drive Capacitive Loads Up to

specifically to provide high quality output power with a

100pF

minimal

number

of

external

components.

The

•

“Click and Pop” Suppression Circuitry

LM4954 does not require output coupling capacitors

•

2.7V - 9.0V Operation

or bootstrap capacitors, and therefore is ideally suited

for lower-power portable applications where minimal

•

Available in Space-Saving DSBGA Package

space

and

power

consumption

are

primary

requirements.

APPLICATIONS

The LM4954 features a low-power consumption

•

Mobile Phones

global shutdown mode which is achieved by driving

•

PDAs

the shutdown pin with logic low. Additionally, the

LM4954

features

an

internal

thermal

shutdown

KEY SPECIFICATIONS

protection mechanism.

•

Wide Power Supply Voltage Range, 2.7

≤ VDD ≤

The LM4954 contains advanced pop & click circuitry

9V

which eliminates noises that would otherwise occur

•

Output Power: VDD = 7V, 1% THD+N, 2.4W

during turn-on and turn-off transitions.

(Typ)

The

LM4954

is

unity-gain

stable

and

can

be

•

Quiescent Power Supply Current, 3mA (Typ)

configured by external gain-setting resistors.

•

PSRR: VDD = 5V and 3V at 217Hz, 80dB (Typ)

•

Shutdown Power Supply Current, 0.01µA (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.

2

Boomer is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2013, 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.