TPA6011A4 Datasheet, PDF (1/31 Pages) Texas Instruments – 3-W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL

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TPA6011A4
SLOS392A – FEBRUARY 2002 – REVISED JULY 2004
3-W STEREO AUDIO POWER AMPLIFIER
WITH ADVANCED DC VOLUME CONTROL
FEATURES
• Advanced DC Volume Control With 2-dB
Steps
From -40 dB to 20 dB
– Fade Mode
– Maximum Volume Setting for SE Mode
– Adjustable SE Volume Control
Referenced to BTL Volume Control
• 3 W Into 3-Ω Speakers
• Stereo Input MUX
• Differential Inputs
APPLICATIONS
• Notebook PC
• LCD Monitors
• Pocket PC
APPLICATION CIRCUIT
1
PGND
24
ROUT+
23
SE/BTL
Power Supply
CS ² ROUT-
3
PVDD
22
HP/LINE
Ci
Right HP
Audio Source
Ci
4
RHPIN
21
VOLUME
Right Line
Audio Source
5
RLINEIN
Ci
20
SEDIFF
6
RIN
19
SEMAX
CS ^VDD
7
VDD
18
AGND
Ci
8
LIN
17
BYPASS
Left Line
Audio Source _Ci
Left HP
Audio Source
Power Supply
Ci
9
LLINEIN
16
FADE
10 _{LHPIN SHUTDOWN 15}
11 _PVDD
CS ¹² LOUT-
LOUT+ ¹⁴
13
PGND
VDD
100 kΩ
100 kΩ
In From DAC
or
Potentiometer
(DC Voltage)
C(BYP)
System
Control
DESCRIPTION
The TPA6011A4 is a stereo audio power amplifier
that drives 3 W/channel of continuous RMS power
into a 3-Ω load. Advanced dc volume control
minimizes external components and allows BTL
(speaker) volume control and SE (headphone) vol-
ume control. Notebook and pocket PCs benefit from
the integrated feature set that minimizes external
components without sacrificing functionality.
To simplify design, the speaker volume level is
adjusted by applying a dc voltage to the VOLUME
terminal. Likewise, the delta between speaker volume
and headphone volume can be adjusted by applying
a dc voltage to the SEDIFF terminal. To avoid an
unexpected high volume level through the
headphones, a third terminal, SEMAX, limits the
headphone volume level when a dc voltage is ap-
plied. Finally, to ensure a smooth transition between
active and shutdown modes, a fade mode ramps the
volume up and down.
Right
Speaker
CC
1 kΩ
Headphone
s
1 kΩ
CC
Left
Speaker
DC VOLUME CONTROL
30
20
10
0 BTL Volume
-10
-20
-30
SE Volume,
-40
SEDIFF [Pin 20] = 0 V
-50
SE Volume,
-60
SEDIFF [Pin 20] = 1 V
-70
-80
BTL Volume (dB) ∝ Volume (V)
SE Volume (dB) ∝ Volume (V) - SEDIFF
-90
(V)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Volume [Pin 21] - V
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2002–2004, Texas Instruments Incorporated