LM48411

www.ti.com

SNAS399G – SEPTEMBER 2007 – REVISED MAY 2013

LM48411

Ultra-Low EMI, Filterless, 2.5W, Stereo, Class D

Audio Power Amplifier with E2S

Check for Samples: LM48411

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FEATURES

DESCRIPTION

The LM48411 is a single supply, high efficiency,

2

•

E2S System Reduces EMI Preserving Audio

2.5W/channel Class D audio amplifier. The LM48411

Quality and Efficiency

features TI's Enhanced Emissions Suppression (E2S)

•

Output Short Circuit Protection

system, that features a unique patent-pending ultra

•

Stereo Class D Operation

low EMI, spread spectrum, PWM architecture, that

significantly reduces RF emissions while preserving

•

No Output Filter Required for Inductive Loads

audio

quality

and

efficiency.

The

E2S

system

•

Logic Selectable Gain

improves battery life, reduces external component

•

Independent Shutdown Control

count, board area consumption, system cost, and

simplifying design.

•

Minimum External Components

•

"Click and Pop" Suppression Circuitry

The LM48411 is designed to meet the demands of

mobile phones and other portable communication

•

Micro-Power Shutdown Mode

devices. Operating on a single 5V supply, it is

•

Available in Space-Saving 0.5mm Pitch

capable of delivering 2.5W/channel of continuous

DSBGA Package

output power to a 4

Ω load with less than 10%

THD+N. Its flexible power supply requirements allow

APPLICATIONS

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

spectrum architecture of the LM48411 reduces EMI-

•

Mobile Phones

radiated emissions due to the modulator frequency.

•

PDAs

The LM48411 features high efficiency compared to a

•

Portable Electronic Devices

conventional Class AB amplifier. The E2S system

includes an advanced, patent-pending edge rate

KEY SPECIFICATIONS

control

(ERC)

architecture

that

further

reduce

emissions

by

minimizing

the

high

frequency

•

Efficiency at 3.6V, 500mW into 8

Ω Speaker:

component of the device output, while maintaining

87% (typ)

high quality audio reproduction and high efficiency (

η

•

Efficiency at 3.6V, 100mW into 8

Ω Speaker:

= 87% at VDD = 3.6V, PO = 500mW). Four gain

80% (typ)

options are pin selectable through GAIN0 and GAIN1

•

Efficiency at 5V, 1W into 8

Ω Speaker:

pins.

88% (typ)

The LM48411 features a low-power consumption

•

Quiescent Current, 3.6V Supply: 4.2mA (typ)

shutdown mode. Shutdown may be enabled by

driving the Shutdown pin to a logic low (GND).

•

Power Output at VDD = 5V RL = 4Ω, THD ≤ 10%:

2.5W (typ)

Output short circuit protection prevents the device

•

Power Output at VDD = 5V RL = 8Ω, THD ≤ 10%:

from being damaged during fault conditions. Superior

1.5W (typ)

click

and

pop

suppression

eliminates

audible

transients on power up/down and during shutdown.

•

Total Shutdown Power Supply Current:

Independent left/right shutdown control maximizes

0.01µA (typ)

power savings in mixed mono/stereo applications.

•

Single Supply Range: 2.4V to 5.5V

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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.