LM4916

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SNAS179E – MAY 2003 – REVISED MAY 2013

LM4916

1.5V, Mono 85mW BTL Output, 14mW Stereo

Headphone Audio Amplifier

Check for Samples: LM4916

1

FEATURES

DESCRIPTION

The unity gain stable LM4916 is both a mono

2

•

Single-Cell 0.9V to 2.5V Battery Operation

differential output (for bridge-tied loads or BTL) audio

•

BTL Mode for Mono Speaker

power amplifier and a Single Ended (SE) stereo

•

Single-Ended Headphone Operation with

headphone amplifier. Operating on a single 1.5V

Coupling Capacitors

supply, the mono BTL mode delivers 85mW into an

8

Ω load at 1% THD+N. In Single Ended stereo

•

Unity-Gain Stable

headphone mode, the amplifier delivers 14mW per

•

"Click and Pop" Suppression Circuitry

channel into a 16

Ω load at 1% THD+N.

•

Active-Low Micropower Shutdown

With the LM4916 packaged in the MM and WSON

•

Low Current, Active-Low Mute Mode

packages, the customer benefits include low profile

•

Thermal Shutdown Protection Circuitry

and small size. These packages minimize PCB area

and maximizes output power.

APPLICATIONS

The LM4916 features circuitry that reduces output

transients ("clicks" and "pops") during device turn-on

•

Portable One-Cell Audio Products

and turn-off, an externally controlled, low-power

•

Portable One-Cell Electronic Devices

consumption, active-low shutdown mode, and thermal

shutdown.

Boomer

audio

power

amplifiers

are

KEY SPECIFICATIONS

designed specifically to use few external components

and provide high quality output power in a surface

•

Mono-BTL Output Power

mount package.

•

•

Stereo Headphone Output Power

•

•

Micropower Shutdown Current, 0.02µA (typ)

•

Supply Voltage Operating Range,

•

Typical Application

Figure 1. Block Diagram

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2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2013, 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.