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DESCRIPTION

APPLICATIONS

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10

20

30

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

Volume [Pin 18] - V

DC VOLUME CONTROL

BTL Volume

PGND

ROUT-

RIN+

RIN-

LIN-

LIN+

LOUT-

1

ROUT+

SE/BTL

VOLUME

AGND

NC

BYPASS

FADE

SHUTDOWN

LOUT+

PGND

2

3

4

5

6

7

8

9

10

11

12

14

15

16

17

13

18

19

20

Right Positive

Differential Input Signal

Left Negative

Differential Input Signal

Right Negative

Differential Input Signal

Left Positive

Differential Input Signal

C

C

i

i

Power Supply

Power Supply

100 kW

100 kW

C

330 F

O

m

C

330 F

O

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

0.47 F

m

C

10 F

S

m

C

0.47 F

(BYP)

m

In From DAC

or

Potentiometer

(DC Voltage)

System

Control

Right

Speaker

Left

Speaker

Headphones

1 kW

1 kW

TPA6021A4

SLOS465 – JUNE 2005

2-W STEREO AUDIO POWER AMPLIFIER

WITH ADVANCED DC VOLUME CONTROL

•

2 W Into 4-

Ω Speakers With External Heatsink

The TPA6021A4 is a stereo audio power amplifier

that drives 2 W/channel of continuous RMS power

•

DC Volume Control With 2-dB

into a 4-

Ω load when utilizing a heat sink. Advanced

Steps from -40 dB to 20 dB

dc volume control minimizes external components

– Fade Mode

and allows BTL (speaker) volume control and SE

– -85-dB Mute Mode

(headphone) volume control.

•

Differential Inputs

The 20-pin DIP package allows for the use of a

•

1-µA Shutdown Current (Typical)

heatsink which provides higher output power.

•

Headphone Mode

To ensure a smooth transition between active and

shutdown modes, a fade mode ramps the volume up

and down.

•

LCD Monitors

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005, 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.