
APPLICATIONCIRCUIT
PGND
ROUT
PV
DD
PV
DD
RHPIN
RLINEIN
RIN
V
DD
V
DD
LIN
LLINEIN
LHPIN
LOUT
1
ROUT+
SE/BTL
HP/LINE
VOLUME
SEDIFF
SEMAX
AGND
BYPASS
FADE
SHUTDOWN
LOUT+
PGND
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
C
S
C
i
C
i
C
i
C
i
C
i
C
i
C
S
C
S
RightHP
AudioSource
PowerSupply
RightLine
AudioSource
LeftLine
AudioSource
LeftHP
AudioSource
PowerSupply
V
DD
100kW
C
InFromDAC
or
Potentiometer
(DCVoltage)
C
(BYP)
SystemControl
C
Right
Speaker
Left
Speaker
Headphones
1kW
S001
DCVOLUMECONTROL
Volume[Pin21] V
Gain
dB
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
DD =5.0V
BTLOutput
R =NoLoad
L
GAIN(BTL)
vs
VOLUMEVOLTAGE
www.ti.com
SLOS635 – NOVEMBER 2009
3-W STEREO AUDIO POWER AMPLIFIER
WITH ADVANCED DC VOLUME CONTROL
1
FEATURES
DESCRIPTION
2
Advanced 32-Steps DC Volume Control
–
Steps from –40 to 18 dB
The TPA6013A4 is a stereo audio power amplifier
that drives 3 W/channel of continuous RMS power
–
Fade Mode
into a 3-
load. Advanced dc volume control
–
Maximum Volume Setting for SE Mode
minimizes external components and allows BTL
–
Adjustable SE Volume Control
(speaker)
volume
control
and
SE
(headphone)
Referenced to BTL Volume Control
volume control. Notebook and pocket PCs benefit
from
the
integrated
feature
set
that
minimizes
3 W Into 3-
Speakers
external components without sacrificing functionality.
Stereo Input MUX
To simplify design, the speaker volume level is
Headphone Mode
adjusted by applying a dc voltage to the VOLUME
Pin-to-pin compatible with TPA6011A4 and
terminal. Likewise, the delta between speaker volume
TPA6012A4
and headphone volume can be adjusted by applying
a dc voltage to the SEDIFF terminal. To avoid an
24-pin PowerPAD Package (PWP)
unexpected
high
volume
level
through
the
headphones, a third terminal, SEMAX, limits the
APPLICATIONS
headphone volume level when a dc voltage is
Notebook PC
applied. Finally, to ensure a smooth transition
LCD Monitors
between active and shutdown modes, a fade mode
Pocket PC
ramps the volume up and down.
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.