LM4995, LM4995TMBD

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SNAS329F – APRIL 2006 – REVISED NOVEMBER 2009

LM4995

1.3 W Audio Power Amplifier

Check for Samples: LM4995, LM4995TMBD

1

FEATURES

networks or bootstrap capacitors required

•

Unity-gain stable

2

•

Available in space-saving 0.4mm pitch

μSMD

package

•

External gain configuration capability

•

Ultra low current shutdown mode

•

LLP package: 0.5mm pitch, 3 x 3 mm

•

BTL output can drive capacitive loads

APPLICATIONS

•

Improved pop & click circuitry eliminates

noise during turn-on and turn-off transitions

•

Mobile Phones

•

2.4 - 5.5V operation

•

PDAs

•

No output coupling capacitors, snubber

•

Portable electronic devices

DESCRIPTION

The LM4995 is an audio power amplifier primarily designed for demanding applications in mobile phones and

other portable communication device applications. It is capable of delivering 1.2W of continuous average power

to an 8

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal

amount of external components. The LM4995 does not require output coupling capacitors or bootstrap

capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal

power consumption is a primary requirement.

The LM4995 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin

with logic low. Additionally, the LM4995 features an internal thermal shutdown protection mechanism.

The LM4995 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during

turn-on and turn-off transitions.

The LM4995 is unity-gain stable and can be configured by external gain-setting resistors.

Table 1. Key Specifications

VALUE

UNIT

■ PSRR at 3.6V (217Hz & 1kHz)

75

dB

■ Output Power at 5.0V, 1% THD+N, 8Ω

1.3

W (typ)

■ Output Power at 3.6V, 1% THD+N, 8Ω

625

mW (typ)

■ Shutdown Current

0.01µA (typ)

1

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

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2006–2009, 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.