Texas Instruments Car Amplifier TPA0103 User Manual

User’s Guide  
August 1998  
Mixed-Signal Products  
SLOU015  
 
Preface  
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.  
TPA0103 3-CHANNEL AUDIO POWER AMPLIFIER STEREO  
SINGLE-ENDED 500-mW AND MONO BTL 1.75-W (literature  
number SLOS167) This is the data sheet for the TPA0103 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.  
Trademarks  
TI is a trademark of Texas Instruments Incorporated.  
iii  
 
iv  
 
Contents  
1
2
3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1  
1.1  
1.2  
1.3  
Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4  
TPA0103 EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4  
Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1  
2.1  
2.2  
2.3  
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
Quick Start List for Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3  
Quick Start List for Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4  
Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1  
3.1  
3.2  
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
The TPA0103 Audio Amplifier Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3  
3.2.1 TPA0103 Audio Amplifier IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
3.2.2 Output Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
3.2.3 Inputs and Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
Using The TPA0103 EVM With The Plug-N-Play Evaluation Platform . . . . . . . . . . . . . . 3-7  
3.3.1 Installing and Removing EVM Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7  
3.3.2 TPA0103Module Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8  
3.3.3 Signal Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11  
3.3.4 Mode Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12  
3.3.5 Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14  
3.3.6 Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15  
Using The TPA0103 EVM Stand-ALone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16  
3.4.1 TPA0103 EVM Connected for Center Channel BTL Output . . . . . . . . . . . . . . . 3-16  
3.4.2 TPA0103 EVM Connected for Stereo Headphones Output . . . . . . . . . . . . . . . 3-17  
TPA0103 Audio Amplifier Evaluation Module Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 3-18  
3.3  
3.4  
3.5  
v
 
Figures  
1–1  
2–1  
2–2  
3–1  
3–2  
3–3  
3–4  
3–5  
3–6  
3–7  
3–8  
3–9  
The TI TPA0103 Audio Amplifier Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4  
Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
Quick Start Module Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4  
The TI Plug-N-Play Audio Amplifier Evaluation Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
TPA0103 EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3  
TPA0103 EVM Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
TPA0103 Audio Amplifier IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
TPA0103 EVM Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8  
Platform Signal Routing and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11  
Mute/Mode and Polarity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12  
Typical Headphone Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15  
TPA0103 EVM Connected for Center Channel BTL Output . . . . . . . . . . . . . . . . . . . . . . . . 3-16  
3–10 TPA0103 EVM Connected for Stereo Headphones Output . . . . . . . . . . . . . . . . . . . . . . . . . 3-17  
Tables  
2–1  
2–2  
2–3  
2–4  
2–5  
3–1  
3–2  
3–3  
3–4  
3–5  
Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA0103 . . . . . . . . . 2-1  
Typical TPA0103 EVM Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1  
TI Plug-N-Play Platform Jumper and Switch Settings for the TPA0103 . . . . . . . . . . . . . . . 2-3  
TPA0103 EVM Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3  
TPA0103 EVM Stand-Alone Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4  
TPA0103 Output Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
TPA0103 Output Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9  
Typical TPA0103 EVM Jumper Settings for Center Channel BTL Stand-Alone . . . . . . . . 3-16  
Typical TPA0103 EVM Jumper Settings for Stereo Headphones Output . . . . . . . . . . . . . 3-17  
TPA0103 EVM Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18  
vi  
 
Chapter 1  
Introduction  
This chapter provides an overview of the Texas Instruments (TI ) TPA0103  
Audio Amplifier Evaluation Module (SLOP103). It includes a list of EVM  
features, a brief description of the module illustrated with a pictorial diagram,  
and a list of EVM specifications.  
Topic  
Page  
1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3  
1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4  
1.3 TPA0103 EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4  
1-1  
 
1-2  
Introduction  
 
Feature Highlights  
1.1 Feature Highlights  
The TI TPA0103 Audio Amplifier Evaluation Module and the TI Plug-N-Play  
Audio Amplifier Evaluation Platform include the following features:  
TPA0103 Low-Voltage Audio Power Amplifier Evaluation Module  
535-mW single-ended into 4 at 5 V L/R channels  
1.75-W bridge-tied load (BTL) into 4 at 5 V center channel  
3.3-V and 5-V operation  
Low distortion (< 0.25% THD+N at full power)  
Ultra-low current consumption in full shutdown mode  
Two sets of stereo inputs with internal MUX  
Module gain adjustable between approximately 2 and 22  
Quick and Easy Configuration with The TI Plug-N-Play Audio Amplifier  
Evaluation Platform  
Evaluation module is designed to simply plug into the platform, auto-  
matically 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 DC V  
supply inputs  
CC  
External regulated V  
supply input  
DD  
Socket for onboard 5 V/3.3 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  
1-3  
Introduction  
 
Description  
1.2 Description  
The TPA0103 Audio Power Amplifier Evaluation Module is a complete,  
low-power three-channel audio power amplifier. It consists of the TI TPA0103  
3-Channel Audio Power Amplifier IC along with a small number of other parts  
mounted on a circuit board that measures approximately 2 inches by 1  
inches (Figure 1–1).  
Figure 1–1. The TI TPA0103 Audio Amplifier Evaluation Module  
R10  
R8  
R11  
C7  
VDD  
GND  
RHP  
GND  
RIN  
ROUT+  
GND  
+
C11  
R7  
R14  
S5  
C6  
COUT–  
S3  
S4  
HP/L*  
GND  
R9  
MODE A  
C9 C10  
R15  
R12  
C8  
MODE B  
R18  
R16  
GND  
TPA0103 EVM  
REV. A  
Lit.# SLOP103  
R4  
C12  
C3  
R1  
R13  
S2  
SDWN  
C5  
S1  
C1  
LIN  
R6  
COUT+  
GND  
LHP  
R2  
–3  
GND  
R5  
C2  
R3  
LOUT+  
009228  
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 TPA0103 evaluation module and is a  
convenient vehicle for demonstrating TI’s audio power amplifier and related  
evaluation modules. The EVMs simply plug into the platform, which auto-  
matically provides power to the modules, interconnects them correctly, and  
connectsthemtoaversatilearrayofstandardaudioinputandoutputjacksand  
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 TPA0103 EVM Specifications  
Supply voltage range, V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 V to 5.5 V  
DD  
Supply current, I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A, max  
DD  
Continuous output power, P : center channel, THD = 0.2%, 4-BTL, V =5 V: . . . . 1.75 W  
O
DD  
L/R channels, THD = 0.2%, 4-SE, V =5 V: . . . . . . 535 mW  
DD  
L/R channels, THD = 0.2%, 32-SE, V =5 V: . . . . 100 mW  
DD  
Audio input voltage, V :  
L/R IN, gain = 2 – 22 BTL . . . . . . . . . . . . . . . . . . 0.75 V , max  
I
PP  
L/R IN HP, gain = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 4 V , max  
PP  
Minimum load impedance, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Ω  
L
1-4  
Introduction  
 
Chapter 2  
Quick Start  
ThestepsinthischaptercanbefollowedtoquicklypreparetheTPA0103audio  
amplifier EVM for use. Using the TPA0103 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.  
The audio amplifier evaluation module can also be used stand-alone by  
makingconnectionsdirectlytothemodulepins, anditcanbewireddirectlyinto  
existing circuits or equipment.  
The platform switch and jumper settings shown in Tables 2–1 and the  
TPA0103 EVM jumper settings shown in Table 2–2 are typical for the TPA0103  
EVM.  
Table 2–1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA0103  
OUTPUT MODE  
Center Only  
Center or L/R  
3-Channel  
JP6  
OFF  
Mode  
OFF  
JP7  
X
JP8  
X
S2  
S3  
Note 2  
Note 2  
Note 2  
U2-U4  
U2-U4  
U2-U4  
X
Hi  
X
X
Notes: 1) X = Don’t care, OFF = Open, ON = Closed  
2) Set S2 to ON when signal conditioning board is installed in U1; set S2  
to OFF when no signal conditioning board is installed.  
Table 2–2. Typical TPA0103 EVM Jumper Settings  
OUTPUT MODE  
Center Only  
Center or L/R  
3-Channel  
S1  
ON  
ON  
ON  
S2  
ON  
S3  
S4  
S5  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
OFF  
Note: OFF = Open, ON = Closed  
Topic  
Page  
2.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2  
2.2 Quick Start List for Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3  
2.3 Quick Start List for Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4  
2-1  
 
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 2–1. Quick Start Platform Map  
6b  
6b  
1
10  
6b  
ICC  
JP4  
C1+  
F1  
VR1  
DC  
Power  
In/Out  
6a  
Power  
Input  
6b  
R2  
R1  
Audio  
Power  
Amps  
Signal Conditioning  
Audio  
Input  
8
Speaker  
Output  
9
4
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  
HP Out  
R3  
R4  
R5  
3
2
4
4
4
2-2  
Quick Start  
 
Quick Start List for Platform  
2.2 Quick Start List for Platform  
Follow these steps when using the TPA0103 EVM with the TI Plug-N-Play  
Audio Amplifier Evaluation Platform (see the platform user’s guide, SLOU011,  
for additional details). Numbered callouts for selected steps are shown in  
Figure 2–1 and details appear in Chapter 3.  
Platform and TPA0103 EVM preparations  
1) EnsurethatallexternalpowersourcesaresettoOFF andthattheplatform  
power switch S1 is set to OFF.  
2) Install a TPA0103 module in platform socket U2, taking care to align the  
module pins correctly.  
3) Use switch S2 to select or bypass the signal conditioning EVM (U1).  
Setting the platform and the EVM for Center or L/R, as indicated in the tables  
below, will cause the EVM to operate in the center channel mode BTL (speak-  
er) when no plug is present in headphone jack J10 and in the L/R single-ended  
mode (headphone) when a plug is inserted into platform headphone jack J10.  
4) Set the jumpers on the platform as indicated in Table 2–3.  
Table 2–3. TI Plug-N-Play Platform Jumper and Switch Settings for the TPA0103  
OUTPUT MODE  
Center or L/R  
JP6  
JP7  
JP8  
S2  
S3  
Mode  
X
Hi  
Note 2  
U2-U4  
Notes: 1) X = Don’t 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.  
5) Set the jumpers on the TPA0103 EVM as indicated in Table 2–4.  
Table 2–4. TPA0103 EVM Jumper settings  
OUTPUT MODE  
Center or L/R  
S1  
S2  
S3  
S4  
S5  
ON  
ON  
OFF  
OFF  
OFF  
Note: OFF = Open, ON = Closed  
Power supply  
6) Select and connect the power supply:  
a) Connect an external regulated power supply set to a voltage between  
3 V and 5.5 V to platform V  
to observe marked polarity,  
power input connector J6 taking care  
DD  
or  
b) Install a voltage regulator EVM (SLVP097 or equiv.) in platform socket  
U6. Install a 9-V battery in B1 or connect a 7 V – 12 V power source  
to a platform V  
power input (see platform user’s guide).  
power input J1 or J2 and jumper the appropriate  
CC  
Inputs and outputs  
7) Ensure that signal source level adjustments and the EVM gain controls,  
R13, R14, and R17, are set to minimum.  
8) Connect the audio source to left and right RCA phono jacks J3 and J5 or  
stereo miniature phone jack J4.  
9) Connect a 4-to 8-speaker to the left and right BLACK speaker  
connectors of J8. DO NOT USE RED CONNECTORS OF J8.  
Power-up  
10) 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.  
11) Adjust the signal source level and EVM gain levels (R13, R14, and R17)  
as needed.  
2-3  
Quick Start  
 
Quick Start List for Stand-Alone  
2.3 Quick Start List for Stand-Alone  
Follow these steps to use the TPA0103 EVM stand-alone or connect it into  
existing circuits or equipment. Connections to the TPA0103 module header  
pins can be made via individual sockets, wire-wrapping, or soldering to the  
pins, either on the top or the bottom of the module circuit board. Numbered  
callouts for selected steps are shown in Figure 2–2 and details appear in  
Chapter 3.  
Figure 2–2. Quick Start Module Map  
R10  
R8  
R11  
S5  
C7  
VDD  
GND  
RHP  
ROUT+  
GND  
+
GND  
C11  
R7  
R14  
C6  
COUT–  
RIN  
S3  
S4  
HP/L*  
GND  
R15  
C8  
R9  
MODE A  
C9 C10  
R12  
4
MODE B  
R18  
3
TPA0103 EVM  
R4  
REV. A  
R16  
Lit.# SLOP103  
C12  
C3  
GND  
R13  
S2  
SDWN  
C5  
S1  
R5  
C1  
C2  
LIN  
R1  
R6  
COUT+  
GND  
LHP  
R2  
–3  
GND  
R3  
LOUT+  
009228  
Power supply  
1) Ensure that all external power sources are set to OFF.  
2) Connect an external regulated power supply set to 5 V to the module VDD  
and GND pins taking care to observe marked polarity.  
TPA0103 EVM jumpers  
Setting the EVM for Center or L/R as indicated in the table below will cause  
the EVM to operate in the center channel BTL mode (speaker).  
3) Set the jumpers on the TPA0103 EVM as indicated in Table 2–5.  
Table 2–5. TPA0103 EVM Stand-Alone Jumper settings  
EVM OUTPUT MODE  
Center or L/R  
S1  
ON  
S2  
ON  
S3  
S4  
S5  
OFF  
OFF  
OFF  
Note: OFF = Open, ON = Closed  
Inputs and outputs  
4) Ensure that signal source level adjustments and EVM gain controls, R13,  
R14, and R17, are set to minimum.  
5) Connect the audio source to the module IN+ and GND pins, taking care  
to observe marked polarity.  
6) Connect the SDWN pin to V  
through a Normally Open switch.  
DD  
7) Connect a 4-to 8-speaker to the module COUT+ and COUT– pins.  
Power-up  
8) Verify correct voltage and input polarity and set the external power supply  
to ON.  
9) Adjust the signal source level and EVM gain levels as needed.  
2-4  
Quick Start  
 
Chapter 3  
Details  
This chapter provides details on the TPA0103 IC, the evaluation module, and  
the steps in the Quick-Start List, additional application information, and a parts  
list for the TPA0103 evaluation module.  
Topic  
Page  
3.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2  
3.2 The TPA0103 Audio Power Amplifier Evaluation Module . . . . . . . . . 3–3  
3.3 Using the TPA0103 EVM With the Plug-N-Play  
Evaluation Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7  
3.4 Using The TPA0103 EVM Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . 3–16  
3.5 TPA0103 Audio Power Amplifier Evaluation Module Parts List . . 3–18  
3-1  
 
Precautions  
3.1 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 3–1. The TI Plug-N-Play Audio Amplifier Evaluation Platform  
ICC  
JP4  
C1+  
F1  
VR1  
DC  
Power  
In/Out  
Power  
Input  
R2  
R1  
Audio  
Power  
Amps  
Signal Conditioning  
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  
HP Out  
R3  
R4  
R5  
3-2  
Details  
 
The TPA0103 Audio Power Amplifier Evaluation Module  
3.2 The TPA0103 Audio Power Amplifier Evaluation Module  
The TPA0103 Audio Power Amplifier Evaluation Module is powered by a  
TPA0103 3-channel audio power amplifier capable of delivering 535 mW of  
continuous power to each of the left and right single-ended 4-speaker loads,  
and 1.75 W of continuous power (BTL) to a center channel 4-load. The  
amplifier IC can be configured for center channel only, center or L/R channels,  
or three channel operation via two mode terminals. The evaluation module  
includes jumpers for setting modes and control inputs for shutdown, selection  
between two sets of stereo inputs, and switching between output modes.  
The module can be used with the TI Plug-N-Play Audio Amplifier Evaluation  
Platform (Figure 31) or wired directly into circuits or equipment. The module  
has single in-line header connector pins mounted to the under side of the  
board. These pins allow the module to be plugged into the TI platform, which  
automatically makes all the signal input and output, power, and control  
connections to the module.  
The module connection pins are on 0.1-inch centers to allow easy use with  
standard perf board and plug board-based prototyping systems. Or, the EVM  
can be wired directly into existing circuits and equipment when used stand-  
alone.  
The module appears in Figure 3–2 and its schematic is shown in Figure 33.  
Figure 3–2. TPA0103 EVM  
R10  
R8  
R11  
S5  
C7  
C6  
VDD  
GND  
RHP  
ROUT+  
GND  
+
GND  
RIN  
C11  
R7  
R14  
COUT–  
S3  
S4  
HP/L*  
GND  
R9  
MODE A  
C9 C10  
R15  
R12  
C8  
MODE B  
R18  
R16  
GND  
TPA0103 EVM  
REV. A  
Lit.# SLOP103  
R4  
C12  
C3  
R1  
R13  
S2  
SDWN  
C5  
S1  
C1  
LIN  
R6  
COUT+  
GND  
LHP  
R2  
–3  
GND  
R5  
C2  
R3  
LOUT+  
009228  
3-3  
Details  
 
The TPA0103 Audio Power Amplifier Evaluation Module  
Figure 3–3. TPA0103 EVM Schematic Diagram  
R15, 20 kΩ  
LOUT+  
ROUT+  
1
2
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
C8  
5 pF  
R13  
200 kΩ  
GND/HS  
NC  
GND/HS  
NC  
C3  
5 pF  
R7  
20 kΩ  
R2  
20 kΩ  
3
R14  
200 kΩ  
LOUT+  
LLINE IN  
LHP IN  
CIN  
ROUT+  
RLINE IN  
RHP IN  
RBYPASS  
C1  
1 µF  
C6  
1 µF  
R1  
20 kΩ  
R8  
R4  
20 kΩ  
20 kΩ  
4
LIN  
RIN  
R9  
20 kΩ  
5
LINHP  
RINHP  
R3  
R10  
20 kΩ  
C2  
C7  
1 µF  
R16  
20 kΩ  
6
20 kΩ  
1 µF  
C9  
2.2 µF  
R17  
TPA0103  
V
7
DD  
R18  
20 kΩ  
V
DD  
V
DD  
V
DD  
200 kΩ  
C5  
2.2 µF  
C10  
C11  
2.2 µF 10 µF  
8
GND  
SHUTDOWN  
NC  
MUTE OUT HP/LINE  
S3  
C12  
5 pF  
9
R5  
100 kΩ  
LV  
HP/L*  
DD  
S1  
10  
11  
12  
R11  
100 kΩ  
COUT+  
COUT+  
MODE B  
GND/HS  
COUT–  
MODE A  
GND/HS  
S2  
V
S5  
MODE B  
DD  
COUT–  
S4  
V
MODE A  
DD  
R6  
100 kΩ  
R12, 100 kΩ  
3.2.1 TPA0103 Audio Amplifier IC  
The TPA0103 audio amplifier IC is a low-voltage CMOS device intended  
primarily for desktop and notebook PCs. In the typical application, the center  
channel amplifier is driven from a mix of the L/R inputs to produce a monaural  
representation of the stereo signal. The center channel amplifier can be shut  
down independently of the L/R output for speaker muting in headphone  
applications. The TPA0103 also features a full shutdown function for power  
sensitive applications reducing current consumption to 5 µA. It is supplied in  
a very small 24-pin TSSOP thermal surface-mount package and has been  
designed to operate from low supply voltages (between approximately 3 V and  
5.5V)anddeliverfullpoweratdistortionlevelsoflessthan0.25%THD+Nfrom  
a 5-V supply (Figure 34).  
3-4  
Details  
 
The TPA0103 Audio Power Amplifier Evaluation Module  
Figure 3–4. TPA0103 Amplifier IC  
TPA0103  
C OUT–  
C OUT+  
C IN  
SHUTDOWN  
MODE A  
CNTL  
MODE B  
R HP IN  
R OUT+  
MUX  
R Line IN  
CNTL  
MUX  
HP/Line  
L HP IN  
L OUT+  
L Line IN  
The IC includes three separate amplifier channels: a left and right stereo pair  
(single-ended)andabridged-tiedload(BTL)centerchannel. IntheBTLmode,  
the two output lines of the center channel operate 180° out-of-phase with each  
other for increased power. The center channel speaker load is connected  
directly across COUT+ and COUT–, and neither line is connected to ground.  
BTL operation provides many benefits, including quadruple the output power  
of single-ended operation and no need for bulky output coupling capacitors.  
The left and right stereo channels operate in the single-ended mode, the  
speaker load is connected between the OUT+ terminal through an output  
coupling capacitor, to system ground. For more information, see the TPA0103  
amplifier IC data sheet, TI Literature Number SLOS167.  
3.2.2 Output Modes  
The TPA0103 amplifier operates in any of three output modes or mutes  
according to the status of the two control terminals MODE A and MODE B as  
shown in Table 3–1.  
Table 3–1. TPA0103 Output Modes  
TERMINAL  
MODE A  
MODE B  
3-Channel  
Mute  
Center Only  
L/R Only  
L
L
H
L
L
H
H
H
Note: L = logic low, H = logic high  
3-5  
Details  
 
The TPA0103 Audio Power Amplifier Evaluation Module  
3.2.3 Inputs and Gain  
The left and right single-ended channels remain separate from input to output.  
On the TPA0103 EVM board, the left and right channel inputs are mixed to  
produce a monaural representation of the stereo signal and applied to the  
amplifier IC center channel input.  
Each of the left and right channels has two separate signal inputs. They are  
called line and headphone (HP) and are pin-selectable. The line inputs and  
the center channel input are adjustable between approximately 2 and 22, and  
the headphone inputs are fixed at a gain of 1. In the typical application in which  
the TPA0103 powers left and right speakers until headphones are plugged in,  
the line input gain can be set so that the two inputs provide approximately the  
same perceived listening level in the headphones as from the speakers. An  
input multiplexor in the amplifier IC selects between the two inputs according  
to the state of the HP/LINE IC pin.  
TheTPA0103amplifierIC, likemostotheramplifiers, exhibitsitsbestdistortion  
and noise performance at lower gain levels (see the TPA0103 data sheet).  
Gain versus total harmonic distortion (THD) should be considered in each  
application. Both the module input signal level and the TPA0103 module gain  
should be adjusted to obtain the lowest overall distortion level for a particular  
overall gain. A quick rule of thumb (everything else being equal): the module  
input signal level should be as high as possible without clipping or overloading  
the TPA0103 input, and the TPA0103 gain should be kept as low as possible.  
3-6  
Details  
 
Using The TPA0103 EVM With the Plug-N-Play Evaluation Platform  
3.3 Using The TPA0103 EVM With the Plug-N-Play Evaluation Platform  
The TPA0103 Audio Amplifier Evaluation Module was designed to be used  
with the TI Plug-N-Play Audio Amplifier Evaluation Platform. It simply plugs  
into socket U2.  
The following paragraphs provide additional details for using the TPA0103  
EVM with the platform.  
3.3.1 Installing and Removing EVM Boards  
TI Plug-N-Play evaluation modules use single-in-line header pins installed on  
the underside of the module circuit board to plug into sockets on the platform.  
The EVM pins and the platform sockets are keyed such that only the correct  
type of EVM can be installed in a particular socket, and then only with the  
proper orientation.  
Evaluation modules are easily removed from the platform by simply prying  
them up and lifting them out of their sockets. Care must be taken, however, to  
prevent bending the pins.  
3.3.1.1 EVM Insertion  
1) Remove all power from the evaluation platform.  
2) Locate socket U2 on the platform.  
3) Orient the module correctly.  
4) Carefully align the pins of the module with the socket pin receptacles.  
5) Gently press the module into place.  
6) Check to be sure that all pins are seated properly and that none are bent  
over.  
3.3.1.2 EVM Removal  
1) Remove all power from the evaluation platform.  
2) Using an appropriate tool as a lever, gently pry up one side of the module  
a small amount.  
3) Change to the opposite side of the module and use the tool to pry that side  
up a small amount.  
4) Alternate between sides, prying the module up a little more each time to  
avoid bending the pins, until it comes loose from the socket.  
5) Lift the EVM off of the platform.  
3-7  
Details  
 
Using The TPA0103 EVM With the Plug-N-Play Evaluation Platform  
3.3.2 TPA0103 Module Jumper Settings  
The TPA0103 EVM is equipped with several jumpers that act like SPST  
switches to allow module operation to be modified to suit various  
requirements. In the following discussion, setting a jumper to ON means that  
a shunt is installed across the two pins of the jumper. Setting a jumper to OFF  
means that no shunt is installed on the jumper. See Figure 3.5.  
In typical applications, some or all of the jumper functions are controlled by the  
system microcontroller or external logic.  
Note that jumpers S2 through S5 tie various amplifier control input pins directly  
to V . When one of these EVM jumpers is set to ON, the signal on the  
DD  
associated EVM control input pin will have no effect. In addition, V appears  
DD  
on that EVM control input pin. Care should be taken to ensure that  
low-impedance paths to ground are not provided through the circuitry that  
applies control signals to the EVM control input pins or that external circuits  
will not be upset by V  
appearing on the EVM control input lines.  
DD  
Figure 3–5. TPA0103 EVM Jumpers  
R15, 20 kΩ  
LOUT+  
ROUT+  
1
2
24  
C8  
5 pF  
R13  
200 kΩ  
GND/HS  
NC  
GND/HS  
C3  
5 pF  
R7  
23  
20 kΩ  
NC  
R2  
20 kΩ  
3
22  
R14  
200 kΩ  
LOUT+  
LLINE IN  
LHP IN  
CIN  
ROUT+  
RLINE IN  
RHP IN  
C1  
1 µF  
C6  
1 µF  
R1  
20 kΩ  
R8  
20 kΩ  
R4  
4
21  
20  
19  
18  
17  
16  
15  
14  
13  
20 kΩ  
LIN  
RIN  
R9  
20 kΩ  
5
LINHP  
RINHP  
R3  
20 kΩ  
R10  
20 kΩ  
C2  
C7  
1 µF  
R16  
20 kΩ  
6
1 µF  
RBYPASS  
C9  
2.2 µF  
R17  
200 kΩ  
TPA0103  
V
DD  
7
R18  
20 kΩ  
V
DD  
V
DD  
V
DD  
C5  
2.2 µF  
C10  
2.2 µF 10 µF  
C11  
8
GND  
SHUTDOWN  
NC  
MUTE OUT HP/LINE  
S3  
C12  
5 pF  
9
R5  
100 kΩ  
LV  
DD  
HP/L*  
S1  
10  
11  
12  
R11  
100 kΩ  
COUT+  
COUT+  
MODE B  
GND/HS  
COUT–  
MODE A  
GND/HS  
S2  
V
DD  
S5  
MODE B  
COUT–  
S4  
V
DD  
MODE A  
R6  
100 kΩ  
R12, 100 kΩ  
3-8  
Details  
 
Using The TPA0103 EVM With the Plug-N-Play Evaluation Platform  
3.3.2.1 S1 — Shutdown Jumper  
To have the module amplifier IC enter the shutdown mode when the module  
mute control input is activated, set shutdown jumper S1 to ON.  
The mute control output pin on the TPA0103 amplifier IC goes high when the  
mute mode is selected by the output mode jumpers (S2 and S4). Jumper S1  
connects the mute output pin to the shutdown control input pin of the IC so that  
when S1 is ON, the IC is forced into shutdown mode instead of mute mode  
when the mute mode is selected. When S1 is OFF, a pulldown resistor on the  
module holds the IC shutdown control input pin low, keeping the IC out of the  
shutdown mode.  
The shutdown mode reduces IC current consumption to approximately 5 µA  
comparedtoapproximately1.5mAinthemutemode. Ittakeslonger, however,  
to resume normal operation from the shutdown mode (approx. 1 s to 2 s) than  
it takes to resume normal operation from the mute mode (approx. 100 ms to  
500 ms).  
3.3.2.2 S2 and S4 — Output Mode Control Jumpers  
Two IC amplifier output mode control pins select among three output modes  
and mute. These pins, Mode A and Mode B, are brought out to module pins  
and also have jumpers that can hardwire the IC amplifier control inputs high.  
Table 3–2 shows the relationship between the IC amplifier control inputs and  
the output modes.  
Table 3–2. TPA0103 Output Modes  
TERMINAL  
3-Channel  
Mute  
Center Only  
L/R Only  
MODE A  
MODE B  
L
L
H
L
L
H
H
H
Note: L = logic low, H = logic high  
Jumper S2 connects the Mode B output mode control input pin on the amplifier  
IC directly to V regardless of the state of the Mode B module control input.  
DD  
When S2 is OFF, a pulldown resistor on the module holds the Mode B output  
mode control input pin low. The Mode B control input pin is not directly  
controlled by anything on the platform — the platform socket for that module  
pin is N/C.  
Jumper S4 connects the Mode A output mode control input pin on the amplifier  
IC directly to V  
regardless of the state of the Mode A module control input,  
DD  
or the input select module control input (HP/L*), or the status of jumper S3  
when autosense jumper S5 is set to ON. When S4 is OFF, a pulldown resistor  
on the module holds the amplifier IC ModeA output mode control input pin low.  
3-9  
Details  
 
Using The TPA0103 EVM With the Plug-N-Play Evaluation Platform  
3.3.2.3 S3 — Input Select Jumper  
To select the line inputs, set input select jumper S3 to OFF. To select the  
headphone inputs, set input select jumper S3 to ON.  
The TPA0103 amplifier IC has two separate inputs for each of the left and right  
stereo channels. An internal multiplexor selects which input will be connected  
to the amplifier based on the state of the HP/LINE pin on the IC. However, the  
EVM HP/L* control input pin is not directly controlled by anything on the  
platform — the platform socket for that module pin is N/C. The amplifier IC  
HP/LINE control pin can be tied high manually via jumper S3 or connected to  
the amplifier IC Mode A control pin via jumper S5 so that it follows that control  
signal.  
For manual control, jumper S3 connects the HP/L* module control input pin to  
V
, so that when S3 is ON, the headphone inputs are selected. When S3 is  
DD  
OFF, a pulldown resistor on the module holds the IC shutdown control input  
pin low, selecting the line inputs.  
3.3.2.4 S5 — Autosense Jumper  
To have the IC amplifier input select control input pin (HP/Line) follow the state  
of the Mode A IC output mode select pin, set autosense jumper S5 to ON. This  
automatically selects the headphone inputs when the Mode A control input  
goes high.  
Note that when autosense jumper S5 is set to ON, amplifier IC control input  
pins HP/Line and Mode A are tied to V , and the Mode A control signal will  
DD  
have no effect if either jumper S3 or jumper S4 are set to ON.  
3-10  
Details  
 
Using The TPA0103 EVM With the Plug-N-Play Evaluation Platform  
3.3.3 Signal Routing  
Signal flow on the platform is controlled by two signal routing switches, as  
shown in Figure 35.  
Figure 3–6. Platform Signal Routing and Outputs  
Off  
+
+
R
L
R
L
R
U2  
TPA0103  
Amplifier EVM  
J8  
Speaker  
Output  
U1  
Signal  
Conditioning  
Audio  
Input  
S2  
L
On  
U2U4  
R
L
+
R
U5  
Stereo  
Headphone  
Amplifier  
J10  
Headphone  
Output  
GND  
S3  
L
+
U5  
3.3.3.1 Signal Conditioning  
The audio signal from the input jacks can be applied to the signal conditioning  
socket (U1) if an EVM is installed there, or socket U1 can be bypassed and the  
audio input signal applied directly to the inputs of the TPA0103.  
Switch S2 selects signal conditioning or bypasses it.  
3.3.3.2 Headphone Output Jack  
Switch S3 is the source select for the stereo headphone output jack, J10. The  
headphone jack is capacitively coupled (via 470 µF electrolytics) and can  
output either the signal from the headphone amplifier in socket U5, or the  
signal from the TPA0103 power amplifier installed in socket U2, as determined  
by the setting of headphone source select switch S3.  
When S3 is set to the power amplifier position (U2 – U4), the headphone jack  
is connected to the TPA0103 left and right OUT+ output lines. When a plug is  
inserted into the jack, signals output through J10 are returned to platform  
ground, requiring single-ended power amplifier operation. A switch inside the  
headphone jack produces a control signal that can be routed to the power  
amplifier socket to shut down the TPA0103 EVM or switch it to stereo  
single-ended headphone output mode when a plug is inserted.  
Source select switch S3 connects the headphone jack to the output lines of  
either the headphone amplifier socket U5 or the power amplifier sockets  
(U2 – U4).  
To route the TPA0103 single-ended stereo headphone amplifier  
outputstotheheadphoneoutputjack(J10), setswitchS3tothepower  
amplifier position (U2 – U4).  
3-11  
Details  
 
Using The TPA0103 EVM With the Plug-N-Play Evaluation Platform  
3.3.4 Mode Control  
The TPA0103 EVM is equipped with a mode control input pin that receives a  
control signal from the platform. This EVM pin is connected to the amplifier IC  
Mode A output mode control input pin. The state of this input, in conjunction  
with the state of the Mode B output mode control input pin, controls the output  
mode of the amplifier IC on the EVM.  
When the EVM mode control input pin (Mode A) is high, the TPA0103 amplifier  
IC on the module either enters the mute mode and dissipates very little power  
when Mode B jumper S2 on the EVM is set to OFF. When S2 is set to ON, a  
high on the EVM mode control input pin causes the amplifier IC to enter the  
L/R stereo outputs only mode.  
When the EVM mode control input is tied to GND or allowed to float, the  
3-channel output mode is selected if S2 is set to OFF and the center channel  
only output mode is selected if S2 is set to ON.  
In the typical application, output mode switching allows the TPA0103 to  
operate the BTL center channel to drive a speaker and then switch to stereo  
left and right single-ended mode to drive headphones when a plug is inserted  
into the headphone jack.  
3.3.4.1 Headphone Jack Control Signals  
The platform headphone output jack (J10) contains an internal switch that  
changesthestateofapairofcontrollineswhenaplugisinserted(Figure3–7).  
Each control line is pulled down by a 1-kresistor to ground (R4 and R5). The  
switch in the headphone jack pulls one line or the other up to V  
through a  
DD  
240-resistor (R3), depending on whether a plug is inserted in J10 or not.  
Figure 3–7. Mute/Mode and Polarity Control  
V
DD  
R3  
240 Ω  
Polarity  
JP8  
JP6  
Mode  
Mute  
Lo  
U2  
Power  
Amplifier  
J10  
Headphone  
Jack  
Hi  
R4  
1 kΩ  
R5  
1 kΩ  
SPK  
(U2–U4)  
3-12  
Details  
 
Using The TPA0103 EVM With the Plug-N-Play Evaluation Platform  
3.3.4.2 Mute/Mode Select (JP6)  
A 3-pin jumper header (JP6) on the platform, functioning as an SPDT switch,  
routes the control signal from the headphone jack to either the mute control  
input pin or the mode control input pin of the evaluation module.  
To switch the TPA0103 amplifier module between center channel  
speaker and stereo headphone modes using the control signal from  
the platform headphone jack, jumper JP6 to MODE  
For center channel only or 3-channel output modes (as selected by  
EVM jumper S2) leave JP6 open.  
3.3.4.3 Mute/Mode Polarity Select (JP8)  
A second 3-pin jumper header (JP8) on the platform selects the control signal  
polarity by connecting either the active-high or the active-low line from the  
headphone jack to jumper JP6.  
When JP6 is set to Mode, set JP8 to Hi.  
When JP6 is open, JP8 settings are ignored.  
3-13  
Details  
 
Power Requirements  
3.3.5 Power Requirements  
The TPA0103 Audio Power Amplifier Evaluation Module can operate from any  
voltagebetweenapproximately3Vand5.5V;however, theTPA0103amplifier  
IC on the module is characterized for operation at 3.3 V and 5 V. For best  
performance (highest output power with lowest distortion), the module should  
be operated at approximately 5 V unless there is a specific reason for  
operating it from a lower voltage.  
The TI Plug-N-Play Audio Amplifier Evaluation Platform with a voltage  
regulator EVM installed on it can provide a regulated V  
supply from a wide  
DD  
variety of unregulated V  
voltage inputs between approximately 5.5 V and  
CC  
12 V, including an on-board 9-V battery. Or, an external regulated power  
source can be used to supply V voltage to the platform and the TPA0103  
DD  
evaluation module installed on it.  
Although the TPA0103 amplifier IC draws approximately 0.9 A from the power  
supply during continuous full power output, peak current draw can be as high  
as 1.5 A. Any power supply connected to the platform should be capable of  
providing 1.5 A of current to avoid clipping the output signal during peaks.  
Current consumption driving speakers at normal listening levels is typically  
0.5 A or less.  
The platform is equipped with overvoltage and reverse-polarity supply voltage  
input protection in the form of fused crowbar circuits.  
V
voltage applied to platform screw terminals J6 MUST NOT exceed  
DD  
the absolute maximum rating for the TPA0103 amplifier IC installed on the  
evaluation module (6 V) or damage to the IC may result. In no case should  
V
voltage of the incorrect polarity or in excess of 6.1 V be applied to  
DD  
screw terminals J6 of the platform, or the power protection circuit on the  
V
line will trip.  
DD  
V
voltage applied to the platform MUST NOT exceed the maximum  
CC  
voltage input specified for the voltage regulator module installed in socket  
U6 (12 V for the SLVP097), or damage to the voltage regulator module  
may result. In no case should V  
voltage applied to the platform exceed  
CC  
15 V, or the overvoltage protection circuit on the V  
bus will trip.  
CC  
3-14  
Details  
 
Inputs and Outputs  
3.3.6 Inputs and Outputs  
The TI Plug-N-Play Audio Amplifier Evaluation Platform is equipped with  
several standard conectors for audio inputs and outputs.  
3.3.6.1 Inputs  
In most cases, audio signals enter the platform through either a pair of RCA  
phono jacks (J3 and J5) or a miniature (1/8) stereo phone jack (J4). Certain  
signal conditioning and amplifier EVMs, however, may have additional signal  
input connectors mounted on the module circuit board.  
The platform audio signal input jacks (J3, J4, and J5) are of the closed-circuit  
type, grounding the signal input lines when no plugs are inserted.  
3.3.6.2 Outputs  
When the TPA0103 EVM is installed, amplified audio output signals leave the  
platform through the negative left and right compression connectors for  
stripped speaker wires (J8) and through a miniature (1/8) stereo phone jack  
(J10), for headphones.  
The TPA0103 EVM BTL center channel audio output from amplifier IC leave  
the platform via the left and right negative (black) compression connectors of  
J8. The positive (red) connectors of J8 are not used. Each output is isolated  
from system ground allowing the TPA0103 center channel power amplifier to  
operate in the highly-efficient bridge-tied load configuration for driving a  
speaker.  
The platform headphone jack (J10) is capacitively coupled to source select  
switch S3, which connects J10 to the output lines of either the headphone  
amplifier socket or the power amplifier sockets (Figure 36). When the  
TPA0103 single-ended left and right stereo headphone output signals are  
routed to J10 by S3, signals output via J10 are returned to platform ground  
when a plug is inserted (Figure 38).  
Figure 3–8. Typical Headphone Plug  
Left  
Right  
GND  
3-15  
Details  
 
Using The TPA0103 EVM Stand-Alone  
3.4 Using The TPA0103 EVM Stand-Alone  
Using the TPA0103 Audio Power Amplifier Evaluation Module stand-alone is  
much the same as using it with the platform. The same 3-V to 5.5-V power  
supply range and the isolated OUT+ and OUT– lines for BTL operation  
requirement exists.  
Note that the mute signal applied to the EVM Mode A pin must be able to sup-  
ply enough current to overcome the pulldown resistor on the module (100 k),  
possibly in parallel with a second pulldown resistor (100 k).  
3.4.1 TPA0103 EVM Connected for Center Channel BTL Output  
Figure 3–9. TPA0103 EVM Connected for Center Channel BTL Output  
5 V  
R10  
R8  
R11  
S5  
C7  
C6  
VDD  
GND  
RHP  
GND  
RIN  
ROUT+  
GND  
+
Audio  
Input  
(Right)  
C11  
R7  
R14  
COUT–  
S3  
S4  
HP/L*  
GND  
R9  
MODE A  
C9 C10  
R15  
R12  
C8  
MODE B  
R18  
R16  
GND  
TPA0103 EVM  
REV. A  
Lit.# SLOP103  
R4  
C12  
C3  
R1  
Audio  
Input  
(Left)  
R13  
S2  
SDWN  
C5  
S1  
C1  
LIN  
R6  
COUT+  
External Mute  
Control  
GND  
LHP  
R2  
–3  
GND  
R5  
C2  
R3  
(active high)  
LOUT+  
009228  
5 V  
Table 3–3. Typical TPA0103 EVM Jumper Settings for Center Channel BTL Stand-Alone  
EVM  
S1  
S2  
S3  
S4  
S5  
TPA0103  
ON  
ON  
OFF  
OFF  
OFF  
Note: ON = shunt installed, OFF = open, X = don’t care  
3-16  
Details  
 
Using The TPA0103 EVM Stand-Alone  
3.4.2 TPA0103 EVM Connected for Stereo Headphones Output  
Figure 3–10. TPA0103 EVM Connected for Stereo Headphones Output  
5 V  
Audio  
Input  
(Right)  
R10  
R8  
R11  
S5  
C7  
C6  
VDD  
GND  
RHP  
GND  
RIN  
ROUT+  
GND  
+
C11  
R7  
R14  
COUT–  
+
S3  
S4  
33 µF –  
1000 µF  
HP/L*  
GND  
R9  
MODE A  
C9 C10  
R15  
5 V  
R12  
C8  
MODE B  
R18  
R16  
GND  
TPA0103 EVM  
REV. A  
Lit.# SLOP103  
R4  
C12  
C3  
R1  
33 µF –  
R13  
S2  
SDWN  
C5  
S1  
1000 µF  
+
C1  
Mute  
LIN  
R6  
COUT+  
GND  
LHP  
R2  
Audio  
Input  
(Left)  
–3  
GND  
R5  
C2  
R3  
LOUT+  
009228  
Table 3–4. Typical TPA0103 EVM Jumper Settings for Stereo Headphone Output  
EVM  
S1  
S2  
S3  
S4  
S5  
TPA0103  
ON  
ON  
ON  
ON  
OFF  
Note: ON = shunt installed, OFF = open, X = don’t care  
3-17  
Details  
 
TPA0103 Audio Power Amplifier Evaluation Module Parts List  
3.5 TPA0103 Audio Power Amplifier Evaluation Module Parts List  
Table 3–5.TPA0103 EVM Parts List  
EVM  
Qty.  
Manufacturer/  
Part Number  
Ref.  
Description  
Size  
Digi-Key Number  
C1, C2,  
C6, C7  
Capacitor, 1 µF, +80%  
–20%, nonpolarized  
1206  
4
Murata  
Newark  
GRM42-6Y5V105Z16BL 93F2254  
C5, C9, C10  
Capacitor, 2.2 µF, 20%,  
1206  
0805  
A
3
TDK  
C3216X5R1A225  
nonpolarized  
C3, C8, C12  
C11  
Capacitor, 5 pF  
3
Panasonic  
ECU-V1H050CCN  
Digi-Key  
PCC050CNCT-ND  
Capacitor, 10 µF, 6.3 V  
1
Panasonic  
ECS-TOJY106R  
Digi-Key  
PCS1106CT-ND  
R1 – R4,  
R7 – R10,  
Resistor, 20 k, 1/8 W,  
5%  
0805  
11  
Panasonic  
ERJ-8GEYJ203V  
Digi-Key  
P20KKABK-ND  
R15, R16, R18  
R5, R6,  
R11, R12  
Resistor, 100 k, 1/8 W,  
0805  
4
3
5
5
1
1
Panasonic  
ERJ-6GEYJ104V  
Digi-Key  
P100KABK-ND  
5%  
R13, R14, R17 Pot, 200 k, 1/8 W,  
Bourns  
3323P-1-204  
Digi-Key  
3323P-1-204ND  
20%, Thru-hole  
S1 – S5  
Header, 2 position  
Shunts  
2 mm  
2 mm  
Norcomp  
Digi-Key  
2163-02-ND  
3M  
Digi-Key  
953170-30-ND  
U1  
IC, TPA0103, 3-channel  
audio amplifier  
24 pin  
TSSOP  
TI  
TPA0103PWP  
PCB1  
PCB, TPA0103 EVM  
TI SLOP103  
3-18  
Details  
 

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