Texas Instruments Stereo Amplifier TPA6101A2 User Manual

User’s Guide  
2001  
Mixed-Signal Products  
SLOU104A  
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Preface  
Read This First  
How to Use This Manual  
This document contains the following chapters:  
Chapter 1Introduction  
Chapter 2Quick Start  
Information About Cautions and Warnings  
This book may contain cautions and warnings.  
This is an example of a caution statement.  
A caution statement describes a situation that could potentially  
damage your software or equipment.  
This is an example of a warning statement.  
A warning statement describes a situation that could potentially  
cause harm to you.  
The information in a caution or a warning is provided for your protection.  
Please read each caution and warning carefully.  
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Running TitleAttribute Reference  
Related Documentation From Texas Instruments  
TI Plug-N-Play Audio Amplifier Evaluation Platform (literature  
number SLOU011) provides detailed information on the evaluation  
platform and its use with TI audio evaluation modules.  
TPA6101A2 50-mW Stereo Audio Power Amplifier (literature  
number SLOS331) This is the data sheet for the TPA6101A2 audio  
amplifier integrated circuit.  
FCC Warning  
This equipment is intended for use in a laboratory test environment only. It  
generates, uses, and can radiate radio frequency energy and has not been  
tested for compliance with the limits of computing devices pursuant to subpart  
J of part 15 of FCC rules, which are designed to provide reasonable protection  
against radio frequency interference. Operation of this equipment in other  
environments may cause interference with radio communications, in which  
case the user at his own expense will be required to take whatever measures  
may be required to correct this interference.  
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Contents  
1
2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1  
1.1  
1.2  
1.3  
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2  
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
TPA6101A2 EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1  
2.1  
2.2  
2.3  
2.4  
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
Quick Start List for Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3  
Quick Start List for Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4  
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5  
2.4.1 TPA6101A2 Filterless Class-D EVM Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5  
2.4.2 TPA6101A2 Audio Power Amplifier Evaluation Module Parts List . . . . . . . . . . 2-6  
2.4.3 TPA6101A2 EVM PCB Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6  
v
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Figures  
11  
21  
22  
23  
24  
25  
The TI TPA6101A2 Audio Amplifier Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
Quick Start Module Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4  
TPA6101A2 Class-D EVM Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5  
TPA6101A2 EVM Top Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6  
TPA6101A2 EVM Bottom Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6  
Tables  
21  
Typical TI Plug-N-Play Platform Jumper and Switch Settings for the  
TPA6101A2 EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1  
TPA6101A2 EVM Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6  
22  
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Chapter 1  
Introduction  
This chapter provides an overview of the Texas Instruments (TI) TPA6101A2  
audio amplifier evaluation module (SLOP336). It includes a list of EVM  
features, a brief illustrated description of the module, and a list of EVM  
specifications.  
Topic  
Page  
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2  
1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3  
1.3 TPA6101A2 EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3  
1-1  
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Features  
1.1 Features  
The TI TPA6101A2 audio amplifier evaluation module and the TI plug-n-play  
audio amplifier evaluation platform include the following features:  
TPA6101A2 Stereo Audio Power Amplifier Evaluation Module  
1.6-V to 3.6-V operation  
Fixed-gain of 2 dB (inverting)  
Dual channel, single-ended operation  
50-mW output power into 16 at 3.3 V  
VerylowdistortionTHD+Nislessthan0.08%at1kHzandlessthan  
0.2% from 20 Hz to 20 kHz into 16-loads, and less than 0.06% at  
1 kHz and less than 0.2% from 20 Hz to 20 kHz into 32-loads  
Extremely low current consumption in shutdown mode  
Internal thermal and short-circuit protection  
Internal pop reduction circuitry  
Quick and Easy Configuration With the TI Plug-N-Play Audio Amplifier  
Evaluation Platform  
Evaluation module is designed to simply plug into the platform,  
automatically making all signal, control, and power connections  
Platform provides flexible power options  
Jumpers on the platform select power and module control options  
Switches on the platform route signals  
Platform provides quick and easy audio input and output connections  
Platform Power Options  
Onboard 9-V battery  
External 5-V 15-V (V ) supply inputs  
CC  
External regulated V  
supply input  
DD  
Socket for onboard 5-V V  
voltage regulator EVM  
DD  
Onboard overvoltage and reverse polarity power protection  
Platform Audio Input and Output Connections  
Left and right RCA phono jack inputs  
Miniature stereo phone jack input  
Left and right RCA phono jack outputs  
Left and right compression speaker terminal outputs  
Miniature stereo headphone jack output  
1-2  
Introduction  
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Description  
1.2 Description  
The TPA6101A2 audio power amplifier evaluation module is a complete,  
low-power stereo audio power amplifier for high-fidelity line-level output,  
headphone, and small speaker applications. It consists of the TI TPA6101A2  
50-mW stereo audio power amplifier IC in a very small MSOP package, along  
with a small number of other parts mounted on a circuit board that is  
approximately one and a quarter inches square (see Figure 11).  
Figure 11. The TI TPA6101A2 Audio Amplifier Evaluation Module  
Due to the very small size of the MSOP IC package, the standard part number TPA6101A2 is  
replaced with the code TIAJM.  
Single in-line header pins are mounted to the underside of the module circuit  
board to allow the EVM to be plugged into the TI plug-n-play audio amplifier  
evaluation platform, or to be wired directly into existing circuits and equipment  
when used stand-alone.  
The platform has room for a single TPA6101A2 evaluation module and is a  
convenient vehicle for demonstrating TIs audio power amplifier and related  
evaluation modules. The EVMs simply plug into the platform, which  
automatically provides power to the modules, interconnects them correctly,  
andconnectsthemtoaversatilearrayofstandardaudioinputandoutputjacks  
and connectors. Easy-to-use configuration controls allow the platform and  
EVMs to quickly model many possible end-equipment configurations.  
There is nothing to build, nothing to solder, and nothing but the speakers  
included with the platform to hook up.  
1.3 TPA6101A2 EVM Specifications  
Supply voltage range, V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 V to 3.6 V  
DD  
Supply current, I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 mA, max  
DD  
Continuous output power, P : 16 , V  
= 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mW  
O
DD  
Audio input voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V  
+ 0.3 Vpp, max  
I
DD  
Minimum load impedance, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Ω  
L
1-3  
Introduction  
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1-4  
Introduction  
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Chapter 2  
Quick Start  
The steps in this chapter can be followed to prepare the TPA6101A2 audio  
amplifier EVM for use. Using the TPA6101A2 EVM with the TI plug-n-play  
audio amplifier evaluation platform is a quick and easy way to connect power,  
signal and control inputs, and signal outputs to the EVM using standard  
connectors. However, the audio amplifier evaluation module can be used  
stand-alone by making connections directly to the module pins, and it can be  
wired directly into existing circuits or equipment.  
The platform switch and jumper settings shown in Table 21 are typical for the  
TPA6101A2 EVM and will cause the TPA6101A2 IC to shutdown/mute when  
a plug is removed from platform headphone jack J10.  
Table 21. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the  
TPA6101A2 EVM  
EVM  
JP6  
JP7  
JP8  
S2  
S3  
TPA6101A2  
X
Lo  
X
See Note 2  
U5  
Notes: 1) X = Dont care  
2) Set S2 to ON when signal conditioning board is installed in U1; set S2  
to OFF when no signal conditioning board is installed.  
Topic  
Page  
2.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
2.2 Quick Start List for Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
2.3 Quick Start List for Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
2.4 Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
2-1  
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Precautions  
2.1 Precautions  
Power Supply Input Polarity and Maximum Voltage  
Always ensure that the polarity and voltage of the external power  
connected to V  
power input connector J1, J2, and/or V  
power  
CC  
DD  
input connector J6 are correct. Overvoltage or reverse-polarity  
power applied to these terminals can open onboard soldered-in  
fuses and cause other damage to the platform, installed evaluation  
modules, and/or the power source.  
Inserting or Removing EVM Boards  
Do not insert or remove EVM boards with power applied: Damage  
to the EVM board, the platform, or both may result.  
Figure 21. Quick Start Platform Map  
6b  
1
10  
6b  
7b  
ICC  
JP4  
C1+  
F1  
VR1  
6a  
DC  
Power  
In/Out  
6b  
Power  
Input  
R2  
R1  
Audio  
Power  
Amps  
Signal Conditioning  
8
Audio  
Input  
Speaker  
Output  
Mode  
Mute  
Polarity  
Lo  
****CAUTION****  
Do not insert or remove  
EVM boards with power  
applied  
Hi  
Stereo  
Headphone  
Output  
Plug-N-Play Audio Amplifier  
Evaluation Platform  
SLOP097 Rev. C.1  
R3  
R4  
HP Out  
9
R5  
4
2
5
3
2-2  
Quick Start  
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Quick Start List for Platform  
2.2 Quick Start List for Platform  
Follow these steps when using the TPA6101A2 EVM with the TI plug-n-play  
audio amplifier evaluation platform (see the platform users guide, literature  
number SLOU011, for additional details). Numbered callouts for selected  
steps are shown in Figure 21.  
Platform preparations  
1) EnsurethatallexternalpowersourcesaresettoOFF andthattheplatform  
power switch S1 is set to OFF.  
2) Install a TPA6101A2 module in platform socket U5, taking care to align the  
module pins correctly.  
3) Use switch S2 to select or bypass the signal conditioning EVM (U1).  
4) Set control signal polarity jumper JP7 to Lo.  
5) Set Hp source switch S3 to U5 to route the output signal to the headphone  
Jack (J10).  
Power supply  
6) Select and connect the power supply:  
7) Connect an external regulated power supply set to a voltage between 1.6  
V and 3.6 V to platform V  
serve marked polarity,  
power input connector J6, taking care to ob-  
DD  
or  
8) Install a 3-V to 5-V voltage regulator EVM (SLVP097 or equiv.) in platform  
socket U6. Install a 9-V battery in B1 or connect a 7-V to 12-V power  
source to a platform V  
power input J1 or J2 and jumper the appropriate  
CC  
power input (see platform users guide). Set jumper JP1 on the SLVP097  
to 3.3-V operation.  
Inputs and outputs  
9) Ensure that signal source level is set to minimum and that potentiometers  
R1 and R4 are set to the midpoint.  
10) Connect the audio source to left and right RCA phono jacks J3 and J5 or  
stereo miniature phone jack J4.  
11) Connect 16-to 32-headphones to headphone jack J10.  
Power-up  
12) Verify correct voltage and input polarity and set the external power supply  
to ON. If V and an onboard regulator EVM are used to provide V , set  
CC  
DD  
platform power switch S1 to ON.  
Platform LED2 should light indicating the presence of V , and the evaluation  
DD  
modules installed on the platform should begin operation.  
2-3  
Quick Start  
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Quick Start List for Stand-Alone  
2.3 Quick Start List for Stand-Alone  
Follow these steps to use the TPA6101A2 EVM stand-alone or when connect-  
ing it into existing circuits or equipment. Connections to the TPA6101A2 mod-  
ule header pins can be made via individual sockets, wire-wrapping, or solder-  
ing to the pins, either on the top or the bottom of the module circuit board.  
Numbered callouts for selected steps are shown in Figure 22.  
Figure 22. Quick Start Module Map  
2
5
4
6
6
4
Due to the very small size of the MSOP IC package, the standard part number TPA6101A2 is  
replaced with the code TIAJM.  
Power supply  
1) Ensure that all external power sources are set to OFF.  
2) Connect an external regulated power supply set between 1.6 V and 3.3 V  
to the module VDD and GND pins taking care to observe marked polarity.  
Inputs and outputs  
3) Ensure that signal source level is set to minimum.  
4) Connect the shutdown pin to V  
through a normally open switch.  
DD  
5) Connect 32-headphones to the module V 1 and V 2 pins through  
O
O
33-µF to 1000-µF output-coupling capacitors (see Figure 38) and return  
to the GND pin, or  
6) For line output, connections to the V 1 and V 2 pins must be made  
O
O
through 33-µF to 1000-µF output-coupling capacitors and returned to  
GND.  
Power-up  
7) Verify correct voltage and input polarity and set the external power supply  
to ON.  
The EVM should begin operation.  
2-4  
Quick Start  
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TPA6101A2 EVM Schematic  
2.4 Reference  
2.4.1 TPA6101A2 EVM Schematic  
The TPA6101A2 EVM schematic is shown in Figure 23.  
Figure 23. TPA6101A2 EVM Schematic Diagram  
C1  
0.1 µF  
RIN  
8
7
1
BYPASS  
IN1–  
C3  
1 µF  
V
V
1
O
ROUT  
2
GND  
TPA6101A2  
6
5
3
4
SHUTDOWN  
V
DD  
DD  
C5  
+
C4  
0.1 µF  
C2  
10 µF  
0.1 µF  
LOUT  
IN2–  
V
O
2
LIN  
R1  
100 kΩ  
S1  
SHUTDOWN  
2-5  
Quick Start  
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TPA6101A2 Audio Power Amplifier Evaluation Module Parts List  
2.4.2 TPA6101A2 Audio Power Amplifier Evaluation Module Parts List  
Table 22.TPA6101A2 EVM Parts List  
Manufacturer/  
Part Number  
Ref.  
Description  
Size  
Qty.  
Vendor/Number  
Arrow  
C1, C2,  
C4  
Capacitor, 0.1 µF, ±10%,  
Nonpolarized, SMD  
0603  
1
Murata  
GRM39X7R104K16  
GRM39X7R104K16  
C3  
C5  
R1  
Capacitor, 1 µF, ±10%,  
0603  
A
1
1
4
1
Murata  
GRM39Y5V105Z010  
Arrow  
GRM39Y5V105Z010  
Nonpolarized, SMD  
Capacitor, 10 µF, 6.3 V,  
SMD  
Panasonic  
ECSTOJY106R  
Digi-Key  
PCS1106CT-ND  
Resistor, 100 k, 1/16 W,  
5%, SMD  
0603  
Panasonic  
ERJ-3GSYJ104  
Digi-Key  
P100KGTR-ND  
S1  
Switch, momentary, SMD  
Panasonic  
Digi-Key  
(SHUT-  
DOWN)  
EVQPJS04K  
P8048SCT-ND  
U1  
IC, TPA6101A2DGK APA, MSOP-8  
50 mW, 2 channel  
1
TI  
TPA6101A2DGK  
PnP Pins Terminal post headers  
11  
Sullins  
Digi-Key  
S1022-36-ND  
2.4.3 TPA6101A2 EVM PCB Layers  
The following illustrations depict the TPA6101A2 PCB layers. These drawings  
are not to scale. Gerber plots can be obtained from any TI sales office.  
Figure 24. TPA6101A2 EVM Top Layer  
Figure 25. TPA6101A2 EVM Bottom Layer  
2-6  
Quick Start  
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