LM4875

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SNAS042C – JANUARY 2002 – REVISED MAY 2013

LM4875

750 mW Audio Power Amplifier with DC Volume

Control and Headphone Switch

Check for Samples: LM4875

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FEATURES

DESCRIPTION

The LM4875 is a mono bridged audio power amplifier

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•

Precision DC Voltage Volume Control

with DC voltage volume control. The LM4875 is

•

Headphone Amplifier Mode

capable of delivering 750mW of continuous average

•

“Click and Pop” Suppression

power into an 8

Ω load with less than 1% THD when

powered by a 5V power supply. Switching between

•

Shutdown Control When Volume Control Pin Is

bridged speaker mode and headphone (single ended)

Low

mode is accomplished using the headphone sense

•

Thermal Shutdown Protection

pin. To conserve power in portable applications, the

APPLICATIONS

typ) is activated when less than 300mV is applied to

the DC Vol/SD pin.

•

GSM Phones and Accessories, DECT, Office

Phones

Boomer

audio

power

amplifiers

are

designed

specifically to provide high power audio output while

•

Hand Held Radio

maintaining high fidelity. They require few external

•

Other Portable Audio Devices

components and operate on low supply voltages.

KEY SPECIFICATIONS

•

•

•

Shutdown Current; 0.7µA(typ)

•

Supply Voltage Range; 2.7V to 5.5 V

TYPICAL APPLICATION

CONNECTION DIAGRAM

Small Outline Package (SOIC)

Mini Small Outline Package (VSSOP)

Top View

See Package Number D, DGK

Figure 1. Typical Audio Amplifier Application

Circuit

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

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PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2013, 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.