LM48410

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SNAS403E – FEBRUARY 2007 – REVISED MAY 2013

LM48410

Low EMI, Filterless, 2.3W Stereo Class D Audio

Power Amplifier with 3D Enhancement

Check for Samples: LM48410

1

FEATURES

DESCRIPTION

The LM48410 is a single supply, high efficiency,

2

•

Selectable Spread Spectrum Mode Reduces

2.3W/channel, filterless switching audio amplifier. A

EMI

low noise PWM architecture eliminates the output

•

Output Short Circuit Protection

filter, reducing external component count, board area

•

Stereo Class D Operation

consumption, system cost, and simplifying design. A

selectable

spread

spectrum

modulation

scheme

•

No Output Filter Required

suppresses RF emissions, further reducing the need

•

3D Enhancement

for output filters.

•

Logic Selectable Gain

The LM48410 is designed to meet the demands of

•

Independent Channel Shutdown Controls

mobile phones and other portable communication

•

Minimum External Components

devices. Operating from a single 5V supply, the

device is capable of delivering 2.3W/channel of

•

Click and Pop Suppression

continuous output power to a 4

Ω load with less than

•

Micro-Power Shutdown

10% THD+N. Flexible power supply requirements

•

Available in Space-Saving 4mm x 4mm WQFN

allow operation from 2.4V to 5.5V. The LM48410

Package

offers two logic selectable modulation schemes, fixed

frequency mode, and an EMI reducing spread

spectrum mode.

APPLICATIONS

The LM48410 features high efficiency compared with

•

Mobile Phones

conventional Class AB amplifiers. When driving an

•

PDAs

8

Ω speaker from a 3.6V supply, the device operates

•

Laptops

options are pin selectable through the G0 and G1

KEY SPECIFICATIONS

pins.

The

LM48410

also

includes

3D

audio

enhancement that improves stereo sound quality. In

•

Quiescent Power Supply Current at 3.6V

devices where the left and right speakers are in close

supply 4mA

proximity,

3D

enhancement

affects

channel

•

specialization, widening the perceived soundstage.

2.3W (typ)

Output short circuit protection prevents the device

•

from being damaged during fault conditions. Superior

1.5W (typ)

click

and

pop

suppression

eliminates

audible

transients on power-up/down and during shutdown.

•

Shutdown current 0.03

μA (typ)

Independent left/right shutdown controls maximizes

•

Efficiency at 3.6V, 100mW into 8

Ω 80% (typ)

power savings in mixed mono/stereo applications.

•

Efficiency at 3.6V, 500mW into 8

Ω 85% (typ)

•

Efficiency at 5V, 1W into 8

Ω 86% (typ)

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

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PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2013, 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.