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TPA6012A4

更新时间： 2024-11-18 05:53:31
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德州仪器 - TI 放大器功率放大器
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28页 667K
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3-W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL

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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  
Fade Mode  
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  
–85-dB Mute Mode  
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.  
•
•
•
•
3 W Into 3-Ω Speakers  
Differential Inputs  
Headphone Mode  
Pin-to-Pin Compatible With TPA6011A4 and  
TPA6013A4  
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.  
•
24-Pin PowerPAD™ Package (PWP)  
APPLICATIONS  
•
•
•
LCD Monitors  
Notebook PC  
All-in-One PC  
The 24-pin PowerPAD™ package (PWP) enchances  
thermal performance.  
APPLICATION CIRCUIT  
DC VOLUME CONTROL  
GAIN (BTL)  
vs  
VOLUME VOLTAGE  
Right  
Speaker  
VDD  
24  
23  
ROUT+  
SE/BTL  
1
CO  
PGND  
20  
100 kW  
100 kW  
330 mF  
Volume Up  
Volume Down  
CS  
2
3
10  
ROUT−  
PVDD  
10 mF  
0.47 mF  
0
−10  
−20  
−30  
−40  
−50  
−60  
1 kW  
Power Supply  
In From DAC  
or  
Potentiometer  
(DC Voltage)  
Right Positive  
Differential  
Input Signal  
5
6
Ci  
Ci  
0.47 mF  
21  
18  
RIN+  
RIN–  
VOLUME  
AGND  
Right Negative  
Differential  
Input Signal  
0.47 mF  
C(BYP)  
VDD  
0.47 mF  
17  
16  
7
BYPASS  
FADE  
VDD  
Headphones  
0.47 mF  
−70  
−80  
−90  
VDD = 5.0 V  
Left Negative  
Differential  
Input Signal  
8
9
Ci  
0.47 mF  
BTL Output  
RL = No Load  
LIN–  
LIN+  
1 kW  
15  
CO  
System Control  
SHUTDOWN  
NC  
Left Positive  
Differential  
Input Signal  
Ci  
0.47 mF  
0.0  
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
3.5  
4.0  
4.5  
5.0  
330 mF  
4, 10, 19, 20, 22  
Volume [Pin 21] − V  
VDD  
11  
12  
14  
13  
PVDD  
Power Supply  
Left  
Speaker  
LOUT+  
PGND  
0.47 mF  
LOUT−  
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.  
2
PowerPAD is a trademark of Texas Instruments.  
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  
 
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