LM4953, LM4953SDBD

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SNAS299E – SEPTEMBER 2005 – REVISED FEBRUARY 2006

LM4953 Boomer™ Audio Power Amplifier Series Ground-Referenced, Ultra Low Noise,

Ceramic Speaker Driver

Check for Samples: LM4953, LM4953SDBD

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FEATURES

DESCRIPTION

The LM4953 is an audio power amplifier designed for

23

•

Pop & Click Circuitry Eliminates Noise During

driving Ceramic Speaker in portable applications.

Turn-On and Turn-Off Transitions

When powered by a 3.6V supply, it is capable of

•

Low, 1

μA (Max) Shutdown Current

forcing 12.6Vpp across a 2

μF + 30Ω bridge-tied-load

•

Low, 7mA (Typ) Quiescent Current

(BTL) with less than 1% THD+N.

•

12.6Vpp Mono BTL Output, Load = 2

μF+ 30Ω

Boomer

audio

power

amplifiers

were

designed

specifically to provide high quality output power with a

•

Thermal Shutdown

minimal

amount

of

external

components.

The

•

Unity-Gain Stable

LM4953 does not require bootstrap capacitors, or

•

External Gain Configuration Capability

snubber circuits. Therefore it is ideally suited for

display applications requiring high power and minimal

APPLICATIONS

size.

•

Cellphone

The LM4953 features a low-power consumption

shutdown mode. Additionally, the LM4953 features an

•

PDA

internal thermal shutdown protection mechanism.

KEY SPECIFICATIONS

The LM4953 contains advanced pop & click circuitry

that eliminates noises which would otherwise occur

•

during turn-on and turn-off transitions.

7mA(Typ)

The

LM4953

is

unity-gain

stable

and

can

be

•

BTL Voltage Swing

configured by external gain-setting resistors.

(2

(Typ)

•

Shutdown Current, 1µA (Max)

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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.