LM4929

www.ti.com

SNAS293B – DECEMBER 2004 – REVISED APRIL 2013

LM4929 Boomer™ Audio Power Amplifier Series Stereo 40mW Low Noise Headphone

Amplifier with OCL Output

Check for Samples: LM4929

1

FEATURES

DESCRIPTION

The LM4929 is an stereo audio power amplifier

23

•

OCL outputs — No DC Blocking Capacitors

capable

of

delivering

40mW

per

channel

of

•

External Gain-Setting Capability

continuous average power into a 16

Ω load or 25mW

•

Available in Space-Saving VSSOP Package

per channel into a 32

Ω load at 1% THD+N from a 3V

power supply.

•

Ultra Low Current Shutdown Mode

•

2V - 5.5V Operation

Boomer

audio

power

amplifiers

were

designed

specifically to provide high quality output power with a

•

Ultra Low Noise

minimal amount of external components. Since the

LM4929 does not require bootstrap capacitors or

APPLICATIONS

snubber networks, it is optimally suited for low-power

•

Portable CD players

portable systems. The LM4929 is configured for OCL

(Output Capacitor-Less) outputs, operating with no

•

PDAs

DC blocking capacitors on the outputs.

•

Portable Electronics Devices

The LM4929 features a low-power consumption

shutdown

mode

with

a

faster

turn

on

time.

KEY SPECIFICATIONS

Additionally, the LM4929 features an internal thermal

•

PSRR at 217Hz and 1kHz

shutdown protection mechanism.

•

The LM4929 is unity gain stable and may be

1% THD+N into a 16

Ω load, 65dB (Typ)

configured with external gain-setting resistors.

•

1% THD+N into a 16

Ω load, 25 mW (Typ)

•

Shutdown current, 40 mW (Typ), 2.0µA (Max)

•

Output Voltage change on release

(Max)

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 © 2004–2013, 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.