LM4928TL National Semiconductor, LM4928TL Datasheet

LM4928TL

Manufacturer Part Number

LM4928TL

Description

Manufacturer

National Semiconductor

Datasheets

1.LM4928TLX.pdf (20 pages)

2.LM4928TL.pdf (20 pages)

3.LM4928TL.pdf (22 pages)

Specifications of LM4928TL

Date_code

07+

Packing_info

2520

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LM4928

1.2 Watt Stereo Fully Differential Audio Amplifier with RF

Suppression and Shutdown Low

General Description

The LM4928 is an stereo fully differential stereo audio power

amplifier primarily designed for demanding applications in

mobile phones and other portable communication devices. It

is capable of delivering 1.2 watts of continuous average

power to a 8Ω load with less than 1% distortion (THD+N)

from a 5V

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4928 does not require output

coupling capacitors or bootstrap capacitors, and therefore is

ideally suited for mobile phone and other low voltage appli-

cations where minimal power consumption is a primary re-

quirement.

The LM4928 features a low-power consumption shutdown

mode. To facilitate this, shutdown may be enabled by logic

low. Additionally, the LM4928 features an internal thermal

shutdown protection mechanism.

The LM4928 contains advanced pop & click circuitry which

eliminates noises which would otherwise occur during

turn-on and turn-off transitions.

Boomer

is a registered trademark of National Semiconductor Corporation.

power supply.

DS201600

Key Specifications

Features

n RF Suppression Circuitry

n Fully differential amplification

n Available in space-saving micro SMD and LLP packages

n Ultra low current shutdown mode

n Can drive capacitive loads up to 100pF

n Improved pop & click circuitry eliminates noises during

n 2.4 - 5.5V operation

n No output coupling capacitors, snubber networks or

Applications

n Mobile phones

n PDAs

n Portable electronic devices and accessories

turn-on and turn-off transitions

bootstrap capacitors required

Improved PSRR at 217Hz

Output Power at 5.0V

Output Power at 3.0V

Shutdown Current

1% THD+N (8Ω)

1% THD+N (8Ω)400mW (typ)

February 2006

www.national.com

0.1µA (typ)

90dB (typ)

1.2W (typ)

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