LM4852LQ National Semiconductor, LM4852LQ Datasheet

LM4852LQ

Manufacturer Part Number

LM4852LQ

Description

Integrated Audio Amplifier System

Manufacturer

National Semiconductor

Datasheet

1.LM4852LQ.pdf (21 pages)

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LM4852

Integrated Audio Amplifier System

General Description

The LM4852 is an audio power amplifier system capable of

delivering 1.1W (typ) of continuous average power into a

mono 8Ω bridged-tied load (BTL) with 1% THD+N and

60mW (typ) per channel of continuous average power into

stereo 32Ω single-ended (SE) loads with 0.5% THD+N, us-

ing a 5V power supply.

The LM4852 features a 32 step digital volume control and

eight distinct output modes. The digital volume control and

output modes are programmed through a two-wire I

patible control interface, that allows flexibility in routing and

mixing audio channels. The LM4852 has 3 channels: one

pair for a two-channel stereo signal and the third for a

single-channel mono input.

The LM4852 is designed for cellular phone, PDA, and other

portable handheld applications. It delivers high quality output

power from a surface-mount package and requires only

seven external components.

The industry leading micro SMD package only utilizes 2mm

x 2.3mm of PCB space, making the LM4852 the most space

efficient audio sub system available today.

Typical Application

Boomer

is a registered trademark of National Semiconductor Corporation.

FIGURE 1. Typical Audio Amplifier Application Circuit

DS200606

C com-

Key Specifications

n THD+N at 1kHz, 1.1W into 8Ω BTL

n THD+N at 1kHz, 60mW into 32Ω SE

n Single Supply Operation

Features

n 1.1W (typ) output power with 8Ω mono BTL load

n 60mW (typ) output power with stereo 32Ω SE loads

n I

n Eight distinct output modes

n micro-SMD and LLP surface mount packaging

n "Click and Pop" suppression circuitry

n Thermal shutdown protection

n Low shutdown current (0.1uA, typ)

Applications

n Moblie Phones

n PDAs

(-40.5dB to +6dB)

C programmable 32 step digital volume control

20060632

www.national.com

2.6 to 5.0V

1.0% (typ)

0.5% (typ)

May 2004

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