TI Confidential - NDA Restrictions

LM49151

www.ti.com

SNAS482F – MARCH 2009 – REVISED MARCH 2013

LM49151 Boomer™ Audio Power Amplifier Series Mono Class D Audio Subsystem with

Earpiece Driver, Ground Referenced Headphone Amplifiers, Speaker Protection and No

Clip with Clip Control

Check for Samples: LM49151

1

FEATURES

DESCRIPTION

The LM49151 is a fully integrated audio subsystem

23

•

E2S Class D Amplifier

designed for portable handheld applications such as

•

Ground Referenced Outputs — Eliminates

cellular phones. The LM49151 combines a 1.25W

Output Coupling Capacitors

mono E2S class D amplifier, 125mW Class AB

•

I2C Programmable No Clip Function with Clip

earpiece

driver,

42mW/channel

stereo

ground

referenced headphone drivers, volume control, input

Control

mixer/multiplexer, and speaker protection into a

•

Voltage Limiter Speaker Protection

single device.

•

I2C Volume and Mode Control

The LM49151 class D speaker amplifier features

•

Ear Piece Amplifier

Texas Instruments' unique Automatic Level Control

•

Advanced Click-and-Pop Suppression

(ALC) that provides both a I2C programmable no-clip

feature with Clip Controls and speaker protection.

•

Low Supply Current

The E2S (Enhanced Emission Suppression) class D

•

Micro-Power Shutdown

amplifier features a patented, ultra low EMI PWM

•

20-bump DSBGA Package

architecture that significantly reduces RF emissions

while preserving audio quality and efficiency while

APPLICATIONS

delivering 1.25W into an 8

Ω load with <1% THD+N

with a 5V supply. The 42mW/channel headphone

•

Mobile Phones

drivers feature Texas Instruments' ground referenced

•

PDAs

architecture that creates a ground-referenced output

•

Notebook PCs

from a single supply, eliminating the need for bulky

and expensive DC-blocking capacitors, saving space

•

Portable Electronics Devices

and minimizing system cost.

•

MP3 Players

The LM49151 features separate volume controls for

the

loudspeaker

and

headphone

inputs.

Mode

KEY SPECIFICATIONS

selection,

shutdown

control,

and

volume

are

•

Output Power at VDD = 3.3V THD+N ≤ 1%

controlled through an I2C compatible interface. The

–

LS Mode, RL = 8Ω 520mW (Typ)

LM49151's

superior

click

and

pop

suppression

eliminates audible transients on power-up/down and

–

HP Mode, RL = 32Ω 40mW (Typ)

during shutdown.

•

Output Power at VDD = 5V THD+N ≤ 1%

–

LS Mode, RL = 8Ω 1.25W (Typ)

–

HP Mode, RL = 32Ω 42mW (Typ)

•

Output Offset

–

LS Mode 15 6mV (Typ)

–

HP Mode 15 2mV (Typ)

1

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 © 2009–2013, 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.