S001

APPLICATIONCIRCUIT

PGND

ROUT−

PV

DD

PV

DD

RIN–

RIN+

V

DD

V

DD

V

DD

LIN–

LIN+

LOUT−

1

ROUT+

SE/BTL

VOLUME

AGND

BYPASS

FADE

SHUTDOWN

LOUT+

PGND

2

3

5

6

7

8

9

11

12

13

14

15

16

17

18

21

23

24

0.47 F

m

C

i

C

i

C

i

C

i

RightNegative

Differential

InputSignal

PowerSupply

RightPositive

Differential

InputSignal

LeftNegative

Differential

InputSignal

LeftPositive

Differential

InputSignal

PowerSupply

V

DD

100kW

100kW

InFromDAC

or

Potentiometer

(DCVoltage)

C

0.47 F

(BYP)

m

SystemControl

C

330 F

O

m

C

330 F

O

m

Right

Speaker

Left

Speaker

Headphones

1kW

1kW

C

10 F

S

m

0.47 F

m

0.47 F

m

0.47 F

m

0.47 F

m

0.47 F

m

0.47 F

m

NC

4,10,19,20,22

DCVOLUMECONTROL

Volume[Pin21] − V

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

10

20

VolumeUp

VolumeDown

V

BTLOutput

R =NoLoad

L

GAIN(BTL)

vs

VOLUMEVOLTAGE

TPA6012A4

www.ti.com

SLOS636 – OCTOBER 2009

3-W STEREO AUDIO POWER AMPLIFIER

WITH ADVANCED DC VOLUME CONTROL

Check for Samples :TPA6012A4

1

FEATURES

DESCRIPTION

2

•

Advanced 32 Steps DC Volume Control

–

Steps From –40 dB to 18 dB

The TPA6012A4 is a stereo audio power amplifier

that drives 3 W/channel of continuous RMS power

–

Fade Mode

into a 3-

Ω load. Advanced dc volume control

–

–85-dB Mute Mode

minimizes external components and allows BTL

•

3 W Into 3-

Ω Speakers

(speaker)

volume

control

and

SE

(headphone)

volume control. LCD monitors and notebook benefit

•

Differential Inputs

from

the

integrated

feature

set

that

minimizes

•

Headphone Mode

external components without sacrificing functionality.

•

Pin-to-Pin Compatible With TPA6011A4 and

To simplify design, the speaker volume level is

TPA6013A4

adjusted by applying a dc voltage to the VOLUME

•

24-Pin PowerPAD™ Package (PWP)

terminal. To ensure a smooth transition between

active and shutdown modes, a fade mode ramps the

APPLICATIONS

volume up and down.

•

LCD Monitors

The 24-pin PowerPAD™ package (PWP) enchances

•

Notebook PC

thermal performance.

•

All-in-One PC

Figure 1. Application Circuit and DC Volume Control

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

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

2

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 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.