TPA6012A4 Datasheet, PDF (1/28 Pages) Texas Instruments – 3-W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL

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3-W STEREO AUDIO POWER AMPLIFIER
WITH ADVANCED DC VOLUME CONTROL
Check for Samples :TPA6012A4
TPA6012A4
SLOS636 – OCTOBER 2009
FEATURES
1
•2 Advanced 32 Steps DC Volume Control
– Steps From –40 dB to 18 dB
– Fade Mode
– –85-dB Mute Mode
• 3 W Into 3-Ω Speakers
• Differential Inputs
• Headphone Mode
• Pin-to-Pin Compatible With TPA6011A4 and
TPA6013A4
• 24-Pin PowerPAD™ Package (PWP)
APPLICATIONS
• LCD Monitors
• Notebook PC
• All-in-One PC
APPLICATION CIRCUIT
DESCRIPTION
The TPA6012A4 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)
volume control. LCD monitors and notebook 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. To ensure a smooth transition between
active and shutdown modes, a fade mode ramps the
volume up and down.
The 24-pin PowerPAD™ package (PWP) enchances
thermal performance.
DC VOLUME CONTROL
1
PGND
24
ROUT+
23
SE/BTL
V_DD
100 kW
C_S
10 mF
Power Supply
Right Positive
Differential
C_i
Input Signal
Right Negative
Differential
C_i
Input Signal
2
0.47 mF
3
ROUT−
PV_DD
0.47 mF 5
RIN+
0.47 mF
V_DD
6
RIN–
7
V_DD
21
VOLUME
18
AGND
17
BYPASS
100 kW
In From DAC
or
Potentiometer
(DC Voltage)
C_(BYP)
0.47 mF
0.47 mF
Left Negative
Differential
C_i
Input Signal
0.47 mF
Left Positive
Differential
Input Signal
C_i
V_DD
0.47 mF
8
LIN–
9
LIN+
16
FADE
15
SHUTDOWN
System Control
4, 10, 19, 20, 22
NC
Power Supply
0.47 mF
11
PV_DD
12
LOUT−
14
LOUT+
13
PGND
Right
Speaker
C_O
330 mF
1 kW
Headphones
C_O
330 mF
1 kW
Left
Speaker
20
10
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
0.0
GAIN (BTL)
vs
VOLUME VOLTAGE
Volume Up
Volume Down
0.5 1.0 1.5 2.0 2.5 3.0 3.5
Volume [Pin 21] − V
V_DD = 5.0 V
BTL Output
R_L = No Load
4.0 4.5 5.0
S001
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.
PowerPAD is a trademark of Texas Instruments.
2
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 © 2009, Texas Instruments Incorporated