LM4863MT National Semiconductor, LM4863MT Datasheet

LM4863MT

Manufacturer Part Number

LM4863MT

Description

Dual 2.2W Audio Amplifier Plus Stereo Headphone Function

Manufacturer

National Semiconductor

Datasheets

1.LM4863MT.pdf (16 pages)

2.LM4863MT.pdf (16 pages)

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Download datasheet (516Kb)

LM4863

Dual 2.2W Audio Amplifier Plus Stereo Headphone

Function

General Description

The LM4863 is a dual bridge-connected audio power ampli-

fier which, when connected to a 5V supply, will deliver 2.2W

to a 4 load (Note 1) or 2.5W to a 3 load (Note 2)with less

than 1.0% THD+N. In addition, the headphone input pin al-

lows the amplifiers to operate in single-ended mode to drive

stereo headphones.

Boomer audio power amplifiers were designed specifically to

provide high quality output power from a surface mount

package while requiring few external components. To sim-

plify audio system design, the LM4863 combines dual bridge

speaker amplifiers and stereo headphone amplifiers on one

chip.

The LM4863 features an externally controlled, low-power

consumption shutdown mode, a stereo headphone amplifier

mode, and thermal shutdown protection. It also utilizes cir-

cuitry to reduce “clicks and pops” during device turn-on.

Note 1: An LM4863MTE which has been properly mounted to the circuit

board will deliver 2.2W into 4 . The other package options for the LM4863

will deliver 1.1W into 8 . See the Application Information section for

LM4863MTE usage information.

Note 2: An LM4863MTE which has been properly mounted to the circuit

board and forced-air cooled will deliver 2.5W into 3 .

Typical Application

Boomer

Refer to the section Proper Selection of External Components, for a detailed discussion of C

is a registered trademark of National Semiconductor Corporation.

FIGURE 1. Typical Audio Amplifier Application Circuit

DS012881

Key Specifications

Features

n Stereo headphone amplifier mode

n “Click and pop” suppression circuitry

n Unity-gain stable

n Thermal shutdown protection circuitry

n Exposed-DAP TSSOP, TSSOP, SOIC and DIP

Applications

n Multimedia monitors

n Portable and desktop computers

n Portable televisions

n P

n Single-ended mode - THD+N

n Shutdown current

packaging available

at 75mW into 32

into 3

into 4

into 8

at 1% THD+N

(LM4863MTE)

(LM4863)

size.

DS012881-1

October 1999

www.national.com

0.5%(max)

0.7µA(typ)

2.5W(typ)

2.2W(typ)

1.1W(typ)

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