LM48413

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SNAS460A – NOVEMBER 2008 – REVISED JANUARY 2009

LM48413 Boomer™ Audio Power Amplifier Series Ultra Low EMI, Filterless, 1.2W Stereo

Check for Samples: LM48413

1

FEATURES

DESCRIPTION

The LM48413 is a single supply, high efficiency,

23

•

1.2W/channel, filterless switching audio amplifier. The

Quality and Efficiency

LM48413 features Texas Instruments' Enhanced

•

Output Short Circuit Protection

•

Stereo Class D Operation

patented ultra low EMI, spread spectrum, PWM

architecture. It significantly reduces RF emission

•

No Output Filter Required

•

Texas Instruments 3D Enhancement

system

improves

battery

life,

reduces

external

•

Minimum External Components

component count, board area consumption, system

cost and product design cycle time. The LM48413TL

•

Click and Pop Suppression

is available in a micro-SMD package, further saving

•

Micro-Power Shutdown

space.

•

Available in Space-Saving Approximately 2mm

The LM48413 is designed to meet the demands of

x 2.2mm DSBGA package

mobile phones and other portable communication

devices. Operating from a single 5V supply, the

APPLICATIONS

device is capable of delivering 1.2W/channel of

continuous output power to a 8

Ω load with less than

•

Mobile Phones

1% THD+N. Flexible power supply requirements

•

PDAs

allow operation from 2.4V to 5.5V. The wide band

•

Laptops

spread

spectrum

architecture

of

the

LM48413

reduces EMI-radiated emissions due to the modulator

KEY SPECIFICATIONS

frequency.

•

Quiescent Power Supply Current at 3.6V

The LM48413 features high efficiency compared with

supply 4mA (Typ)

includes an advanced, patent-pending edge rate

•

control

(ERC)

architecture

that

further

reduce

1.2 W (Typ)

emissions

by

minimizing

the

high

frequency

•

Shutdown current 0.03µA (Typ)

components of the device output, while maintaining

•

Efficiency at 3.6V, 100mW into 8

Ω 80% (Typ)

its high quality audio reproduction and high efficiency

(

•

Efficiency at 3.6V, 500mW into 8

Ω 80% (Typ)

also

includes

Texas

Instruments'

3D

audio

•

Efficiency at 5V, 1W into 8

Ω 86% (Typ)

enhancement that improves stereo sound quality. In

devices where the left and right speakers are in close

proximity,

3D

enhancement

affects

channel

specialization, widening the perceived soundstage.

Output short circuit protection prevents the device

from being damaged during fault conditions. Superior

click

and

pop

suppression

eliminates

audible

transients on power up/down and during shutdown.

Shutdown control also provided to maximizes power

savings.

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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.

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All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2009, 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.