Texas Instruments Stereo Amplifier SLOU082 User Manual

User’s Guide  
September 2000  
Mixed-Signal Products  
SLOU082  
 
Preface  
Related Documentation From Texas Instruments  
TI Plug-N-Play Audio Amplifier Evaluation Platform (TI Literature  
Number SLOU011) provides detailed information on the evaluation  
platform and its use with TI audio evaluation modules.  
TPA032D03 CLASS-D AUDIO POWER AMPLIFIER (TI Literature  
Number SLOS283) This is the data sheet for the TPA032D03  
audio amplifier integrated circuit.  
Design Considerations for Class-D Audio Power Amplifiers,  
(TI Literature Number SLOA031) This application report provides  
detailed information on designing audio power amplifier systems  
using TI class-D amplifier ICs  
Reducing and Eliminating the Class-D Output Filter,  
(TI Literature Number SLOA023) This application report covers  
output filter theory and design for class-D audio power amplifiers.  
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  
PowerPAD is a trademark of Texas Instruments.  
iii  
 
iv  
 
Contents  
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1  
1.1  
1.2  
1.3  
Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2  
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
TPA032D03 Class-D EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4  
1.3.1 Maximum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4  
1.3.2 Typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4  
2
3
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  
3.3  
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
Plug-N-Play Platform Power Requirements and Connections . . . . . . . . . . . . . . . . . . . . . 3-3  
Plug-N-Play Platform Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
3.3.1 Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
3.3.2 Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
Control and Indicator Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
TPA032D03 Class-D EVM Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
Module Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
3.6.1 S1 — Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
3.6.2 S2 — Mute Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
Using The TPA032D03 Class-D EVM Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7  
3.7.1 Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7  
3.7.2 Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8  
3.7.3 Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8  
3.7.4 Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8  
TPA032D03 Class-D EVM Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9  
TPA032D03 Class-D EVM Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10  
3.4  
3.5  
3.6  
3.7  
3.8  
3.9  
3.10 TPA032D03 Class-D EVM PCB Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11  
v
 
Figures  
1–1  
1–2  
2–1  
3–1  
3–2  
3–3  
3–4  
3–5  
3–6  
3–7  
3–8  
3–9  
The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM — Top View . . . . . . . . . . 1-3  
The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM — Bottom View . . . . . . . 1-3  
Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
The TI Plug-N-Play Audio Amplifier Evaluation Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
Typical Headphone Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
TPA032D03 Class-D EVM Stand-Alone Connections for Mono BTL Output . . . . . . . . . . . 3-7  
TPA032D03 Class-D EVM Schematic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10  
TPA032D03 Class-D EVM Top Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11  
TPA032D03 Class-D EVM Bottom Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11  
TPA032D03 Class-D EVM Top Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12  
TPA032D03 Class-D EVM Second Layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12  
TPA032D03 Class-D EVM Third Layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13  
3–10 TPA032D03 Class-D EVM Bottom Layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13  
Tables  
2–1  
Typical TI Plug-N-Play Platform Jumper and Switch Settings for the  
TPA032D03 Class-D EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1  
2–2  
3–1  
3–2  
3–3  
3–4  
Platform Jumper and Switch Settings for the TPA032D03 . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3  
Platform Jumper and Switch Settings for the TPA032D03 EVM Power Inputs . . . . . . . . . 3-3  
TPA032D03 Class-D EVM Fault Indicator Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
TPA032D03 Class-D EVM Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
TPA032D03 Class-D EVM Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9  
vi  
 
Chapter 1  
Introduction  
This chapter provides an overview of the Texas Instruments (TI) TPA032D03  
mono class-D audio power amplifier evaluation module (SLOP310). 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2  
1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3  
1.3 TPA032D03 Class-D EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . 1–4  
1-1  
 
Feature Highlights  
1.1 Feature Highlights  
The TI TPA032D03 mono class-D audio power amplifier evaluation module  
and the TI plug-n-play audio amplifier evaluation platform include the following  
features:  
TPA032D03 Mono Class-D Audio Power Amplifier with Stereo Head-  
phone Amplifier Evaluation Module  
Internal depop circuitry to greatly reduce turn-on transients in outputs  
Single channel, class D bridge-tied load (BTL) only operation  
12 V operation  
10 W BTL output into 4 at 12 V  
Low current consumption in shutdown/mute mode (20 µA/10 mA) ??  
Internal gain set to 25 dB  
IC shutdown, mute, and mode control inputs — TTL logic level  
High efficiency  
Class AB stereo headphone driver — capable of 50 mW into 32 Ω  
Onboard stereo headphone output jack  
CE tested and approved.  
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  
External 5-V – 15-V 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  
1-2  
Introduction  
 
Description  
1.2 Description  
The TPA032D03 mono class-D audio power amplifier evaluation module is a  
complete, 10-W mono audio power amplifier. It consists of the TI TPA032D03  
mono class-D 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 and 1–2).  
Figure 1–1. The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM — Top View  
SLOP310  
TPA032D03 EVM Board  
VCC  
GND  
C1  
R4  
Mute  
SD  
S1  
Mute  
S2  
SD  
C3  
C4  
OUT–  
R2  
C2  
OUT+  
VDD GND  
VCC  
Note: Capacitor C11 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design  
flexibility and allow decoupling capacitance to be added.  
Figure 1–2. The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM — Bottom View  
1-3  
Introduction  
 
TPA032D03 Class-D EVM Specifications  
Single in-line header pins extend from the underside of the module circuit  
board to allow the EVM to either 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.  
TheplatformhasroomforasingleTPA032D03class-Devaluationmoduleand  
is a convenient vehicle for demonstrating TI’s audio power amplifier and  
related evaluation modules. The EVM simply plugs 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 TPA032D03 Class-D EVM Specifications  
AllmeasurementsmadewithV =12VandR =4Ω, unlessotherwisenoted.  
DD  
L
1.3.1 Maximum  
Supply voltage range, V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 V to 14 V  
DD  
Supply current, I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6 A  
DD  
Continuous output power per channel, BTL, P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 W  
O
Continuous output power per channel, headphones, P 32-SE . . . . . . . . . . . . . . . . . . 50 mW  
O:  
Audio input voltage, class-D, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 mVrms  
I
Audio input voltage, headphone, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 Vrms  
I
1.3.2 Typical  
Supply current, no input, class-D active, I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 mA  
DD  
Supply current, no input, headphone active, I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 mA  
DD  
Supply current, EVM mute, class-D active, I  
DD  
Supply current, EVM mute, headphone active, I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 mA  
DD  
Supply current, EVM shutdown, I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 µA  
DD  
Gain, class-D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 dB  
Gain, headphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 dB  
Crosstalk, headphone, P = 30 mW @ 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 dB  
O
Total harmonic distortion + noise, class-D, P = 1 W @ 1 kHz . . . . . . . . . . . . . . . . . . . . . . 0.14 %  
O
Total harmonic distortion + noise, headphone, P = 30 mW @ 1 kHz . . . . . . . . . . . . . . . . . 0.3 %  
O
1-4  
Introduction  
 
Chapter 2  
Quick Start  
Follow the steps in this chapter to quickly prepare the TPA032D03 mono  
class-D audio amplifier EVM for use. Using the TPA032D03 class-D 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 2–1 are typical for the  
TPA032D03 class-D EVM. There are no jumpers or switches to set on  
the TPA032D03 class-D EVM board, itself.  
Table 2–1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the  
TPA032D03 Class-D EVM  
POWER TYPE (Note 2)  
VCC (J1)  
JP1  
ON  
JP2  
OFF  
ON  
JP3  
OFF  
OFF  
JP4  
ON  
ON  
JP5  
ON  
ON  
JP6  
Mute  
Mute  
JP7  
X
JP8  
Lo  
S1  
ON  
ON  
S2 (Note 3)  
OFF  
S3  
U5  
U5  
AC/DC (J2)  
OFF  
X
Lo  
OFF  
Notes: 1) ON = Jumper installed, OFF = Jumper NOT Installed, X = Don’t care  
2) Install a voltage regulator EVM (SLVP097) in platform socket U6 for VDD power to EVM control inputs.  
3) Set to ON when Tone Control Board SLOP109 is installed in U1, otherwise set to OFF.  
Topic  
Page  
2.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2  
2.2 Quick Start List for Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3  
2.3 Quick Start List for Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5  
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  
8
1
9
11  
10  
ICC  
JP4  
C1+  
F1  
VR1  
DC  
Power  
In/Out  
7
Power  
Input  
R2  
R1  
Audio  
Power  
Amps  
Signal Conditioning  
12  
Audio  
Input  
13  
17  
Speaker  
Output  
14  
Mode  
Mute  
Polarity  
Lo  
****CAUTION****  
Do not insert or remove  
EVM boards with power  
applied  
5
Hi  
Stereo  
Headphone  
Output  
Plug-N-Play Audio Amplifier  
Evaluation Platform  
SLOP097 Rev. C.1  
R3  
R4  
HP Out  
R5  
3
16  
2
4
6
2-2  
Quick Start  
 
Quick Start List for Platform  
2.2 Quick Start List for Platform  
Follow these steps when using the TPA032D03 class-D 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 Preparations  
1) Ensure that all external power sources and platform power switch S1 are  
set to OFF.  
2) Install a TPA032D03 module in platform socket U2, taking care to align the  
module pins correctly (EVM power pins engage sockets U2 and U3).  
3) Set switch S2 to OFF.  
4) Set switch S3 to U5.  
5) Set jumper JP6 to select the Mute control input.  
6) Set control signal Polarity jumper JP8 to Lo.  
Table 2–2. Platform Jumper and Switch Settings for the TPA032D03  
POWER TYPE (Note 2)  
JP1  
JP4  
JP5  
JP6  
JP7  
JP8  
S1  
S2 (Note3)  
S3  
VCC (J1)  
ON  
ON  
ON  
Mute  
X
Lo  
ON  
OFF  
U5  
Notes: 1) ON = Jumper installed, OFF = Jumper NOT Installed, X = Don’t care  
2) Install a voltage regulator EVM (SLVP097) in platform socket U6 for VDD power to EVM control inputs.  
3) Set to ON Tone Control Board SLOP109 is installed in U1.  
Power supply  
7) Connect a 12-V regulated power supply (ensure power supply is set to  
OFF ) to J1, taking care to observe marked polarity.  
8) Set jumper JP1 for dc source to be from input J1.  
9) Set jumper JP4 for VCC power to EVMs.  
10) Install a voltage regulator EVM (SLVP097) in platform socket U6.  
11) Set jumper JP5 for VDD power to EVMs.  
Inputs and outputs  
12) Ensure that the audio signal source level is set to minimum.  
13) Connect the audio source to left and right RCA phono jacks J3 and J5 or  
mono miniature phone jack J4.  
14) Connect4-8-speakerstoleftRCAjackJ9ortostrippedwirespeaker  
connectors J8.  
Power up  
15) Verify correct voltage and input polarity and set the external power supply  
and platform power switch S1 to ON.  
Platform LED1 and LED2 should light indicating the presence of VCC and  
VDD, and the evaluation module(s) installed on the platform should begin  
operation.  
16) Set switch S2 to ON if tone control board SLOP109 is installed in U1.  
17) Adjust the signal source level 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 TPA032D03 class-D EVM stand-alone or to  
connect it into existing circuits or equipment. Connections to the TPA032D03  
module header pins can be made via individual sockets, wire-wrapping, or  
solderingtothepins, eitheronthetoporthebottomofthemodulecircuitboard.  
Power supply  
1) Ensure that all external power sources are set to OFF.  
2) Connect an external regulated power supply set to 12 V to the module  
VCC and GND pins taking care to observe marked polarity. It is only  
necessary to use the ground pins adjacent to the module power pins.  
3) Connect an external regulated power supply set to 5 V to the module VDD  
pin taking care to observe marked polarity.  
Inputs and outputs  
4) Ensure that audio signal source level adjustments are set to minimum.  
5) Connect the audio source across the module IN+ and IN– pins for class-D  
operation, taking care to observe marked polarity. For single-ended input,  
thenegativeinputpin(IN–)shouldbeconnectedtothegroundoftheaudio  
signal source.  
6) Connect a control signal to the module Mute pin, if necessary. The control  
signal should be high (2 V to 5 V or left floating) for normal operation, or  
low (tied to ground) to mute the output.  
7) Connect a control signal to the module SD pin, if necessary. The control  
signal should be high (2 V to 5 V or left floating) for normal operation, or  
low (tied to ground) to shut down the TPA032D03 amplifier IC on the EVM.  
NotethatthecontrolsignalsappliedtotheEVMMuteandSDinputsmusthave  
sufficient current capability to overcome the 100-kpullup resistor on each  
input. Miniature pushbutton switches on the EVM allow manual shutdown (S2)  
and manual muting (S1) of the amplifier.  
8) Connect a 4-– 8-speaker to the module OUT+ and OUT– pins, taking  
care to observe marked polarity.  
Power up  
9) Verify correct voltage and input polarity and set the external power supply  
to ON.  
The EVM should begin operation.  
10) Adjust the signal source level as needed.  
2-4  
Quick Start  
 
Chapter 3  
Details  
This chapter provides details on the TPA032D03ICevaluation module, a parts  
list for the TPA032D03 class-D evaluation module, and module PCB layer  
illustrations.  
Topic  
Page  
3.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
3.2 Plug-N-Play Platform Power Requirements and Connections . . . . . 3-3  
3.3 Plug-N-Play Platform Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . 3-4  
3.4 Control and Indicator Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
3.5 TPA032D03 Class-D EVM Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
3.6 Module Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
3.7 Using The TPA032D03 Class-D EVM Stand-Alone . . . . . . . . . . . . . . . . 3-7  
3.8 TPA032D03 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9  
3.9 TPA032D03 Class-D EVM Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10  
3.10 TPA032D03 Class-D EVM PCB Layers . . . . . . . . . . . . . . . . . . . . . . . . . 3-11  
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  
R3  
R4  
HP Out  
R5  
3-2  
Details  
 
Plug-N-Play Platform Power Requirements and Connections  
3.2 Plug-N-Play Platform Power Requirements and Connections  
The TPA032D03 mono class-D audio power amplifier evaluation module is  
designed to operate from a supply voltage between 9 V and 14 V. For best  
performance, the module should be operated at 12 V.  
The TI plug-n-play audio amplifier evaluation platform provides several  
options for powering the TPA032D03 class-D EVM. Table 3–1 shows the  
platform jumper and switch settings for each power source option (see the  
User’s Guide for the TI plug-n-play audio amplifier platform, TI Literature  
Number SLOU011 for more information). The TPA032D03 class-D EVM  
requires no setup for power source selection.  
Table 3–1.Platform Jumper and Switch Settings for the TPA032D03 EVM Power Inputs  
POWER TYPE (Note 2)  
VCC (J1)  
JP1  
ON  
JP2  
OFF  
ON  
JP3  
OFF  
OFF  
JP4  
ON  
ON  
JP5  
ON  
ON  
JP6  
Mute  
Mute  
JP7  
X
JP8  
Lo  
S1  
ON  
ON  
S2 (Note 3)  
OFF  
S3  
U5  
U5  
AC/DC (J2)  
OFF  
X
Lo  
OFF  
Notes: 1) ON = Jumper installed, OFF = Jumper NOT Installed, X = Don’t care  
2) Install a voltage regulator EVM (SLVP097) in platform socket U6 for VDD power to EVM control inputs.  
3) Set to ON when Tone Control Board SLOP109 is installed in U1, otherwise set to OFF.  
Although the TPA032D03 amplifier IC draws approximately 1.6 A from the  
power supply during continuous full power output, peak current draw can be  
as high as 2.3 A. Any power supply connected to the platform should be  
capable of providing 2.3 A (peak) to avoid clipping of the output signal during  
voltage peaks. Current consumption driving speakers at normal listening  
levels is typically 0.1 A or less.  
A V  
supply of 5 V is required for normal operation of the TPA032D03 EVM.  
DD  
V
can either be applied to the platform V  
power input terminals (J6) or a  
DD  
DD  
voltage regulator (SLVP097 or equiv.) can be installed in platform socket U6  
to provide V from the platform V supply.  
DD  
CC  
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 TPA032D03 amplifier IC installed on  
the evaluation module (5.5 V) or damage to the IC may result. In no case  
shouldV voltageoftheincorrectpolarityorinexcessof6.0Vbeapplied  
DD  
to 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  
3-3  
Details  
 
Plug-N-Play Platform Inputs and Outputs  
3.3 Plug-N-Play Platform Inputs and Outputs  
The TI plug-n-play audio amplifier evaluation platform is equipped with several  
standard conectors for audio inputs and outputs.  
3.3.1 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) mono 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.  
3.3.2 Outputs  
Amplified audio output signals leave the platform through the left RCA phono  
jack(J9)andtheleftpairofcompressionconnectorsforstrippedspeakerwires  
(J8).  
The audio output lines from the power amplifiers are separate all the way to  
the edge of the platform (output jacks J8 and J9) — the OUT+ and OUT– lines  
from the power amplifier sockets are not tied to each other or to platform  
ground. This allows the TPA032D03 class-D power amplifier EVM to operate  
in the highly-efficient bridge-tied load configuration when driving speakers.  
The 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 32).  
Figure 3–2. Typical Headphone Plug  
Left  
Right  
GND  
3-4  
Details  
 
Plug-N-Play Platform Inputs and Outputs  
3.4 Control and Indicator Circuits  
Three main control circuits are provided with the TPA032D03. The mute circuit  
grounds the output of the active amplifier, the mode circuit selects between the  
class-D amplifier and the headphone amplifier, and the shutdown circuit  
places the entire device into a power-saving sleep mode to minimize current  
consumption. Each of these inputs is TTL compatible: less than 0.8 V applied  
to these pins is considered a logic low, and any voltage greater than 2 V is  
considered a logic high.  
Two indicator pins are also provided for feedback when an under-voltage or  
thermal fault exists. Module pins are provided for easy connection of off-board  
control and monitoring. There are two active low fault indicator pins on the  
TPA032D03amplifierIC(ICpins41and42)thatprovidefeedbackwhenafault  
condition exists. Signals on these pins provide the status of the acvtive  
amplifier: operational, thermal fault, and under-voltage lockout. Table 3–2 lists  
the possible output conditions of these pins and a description of the fault  
indicated.  
Table 3–2.TPA032D03 Class-D EVM Fault Indicator Table  
FAULT 0  
(TP 1)  
FAULT 1  
(TP 2)  
DESCRIPTION  
1
0
1
1
No fault. — The device is operating normally.  
Chargepump under-voltage lockout (VCP-UV) fault. All low-side transistors are turned on, shorting  
the load to ground. Normal operation resumes when the charge pump voltage is restored (not a  
latched fault), however the Fault indication remains active until cleared by cycling MUTE,  
SHUTDOWN, or the power supply.  
0
0
Thermal fault. All of the low-side transistors are turned on, shorting the load to ground. Once the  
junction temperature drops by 20°C, normal operation resumes (not a latched fault). The Fault  
indication remains active until cleared by cycling MUTE, SHUTDOWN, or the power supply.  
3.5 TPA032D03 Class-D EVM Test Points  
Test points have been included on the TPA032D03 class-D EVM to facilitate  
user analysis of device performance and design adjustments. Table 3–3 lists  
each test point and its corresponding function.  
Table 3–3.TPA032D03 Class-D EVM Test Points  
TEST IC PIN or EVM  
FUNCTION  
POINT  
FUNCTION  
1
2
3
HPVCC  
Onboard 5-V supply  
FAULT_1  
FAULT_0  
MSB for logic-level fault output signal, open drain  
LSB for logic-level fault output signal, open drain  
3-5  
Details  
 
Plug-N-Play Platform Inputs and Outputs  
3.6 Module Switches  
The TPA032D03 mono class-D audio amplifier evaluation module is equipped  
with two pushbutton switches that allow the module shutdown and mute  
functions to be manually activated.  
3.6.1 S1 — Shutdown Switch  
To have the module amplifier IC enter the shutdown mode, press the  
Shutdown switch (S2) on the module. S2 connects the amplifier IC  
SHUTDOWN pin to ground, forcing it into a low-power state. This function can  
be controlled by an external control input to the SD module pin.  
The shutdown mode reduces the amplifier IC current consumption to less than  
1 µA compared to approximately 2.5 mA in the mute mode. The EVM  
shutdown current is based on V  
V
R2, R5, and R6, and capacitor  
CC, DD,  
leakage currents, but will typically be 97 µA ±5% for V  
= 12 V and V  
= 5  
CC  
DD  
V. The plug-n-play platform typically draws 60 mA of current.  
3.6.2 S2 — Mute Switch  
Pushbutton switch S1 on the TPA032D03 class-D EVM allows manual muting  
of the amplifier IC. S1 connects the amplifier IC MUTE pin to ground, muting  
the output. The EVM Mute control input pin also allows external control of this  
function.  
In the mute mode, the amplifier IC lowside output transistors are turned on,  
shorting the load to ground. This reduces the EVM current to 2.5 mA.  
3.6.3 J1 — Headphone Jack Mode Switch  
EVM headphone jack J1 is equipped with an internal switch that grounds the  
amplifierMODEpinuntilaplugisinsertedintothejack. Whenaplugisinserted  
into the headphone jack, the IC MODE pin goes high and the IC headphone  
amplifier goes active and the class-D amplifier shuts off.  
3-6  
Details  
 
Using The TPA032D03 Class-D EVM Stand-Alone  
3.7 Using The TPA032D03 Class-D EVM Stand-Alone  
Using the TPA032D03 mono class-D audio power amplifier evaluation module  
stand-alone is much the same as using it with the platform. The same 9-V to  
14-V power supply range and the isolated OUT+ and OUT– lines for BTL  
operation requirements exist. Inserting a plug into the EVM headphone jack  
switches the EVM to the headphone mode and shuts down the class-D  
amplifier section. Figure 3–3 shows the connections that are required for  
operation (with the exception of the fault monitor circuit, which is optional). The  
discussion in this section is in reference to this figure unless otherwise noted.  
Figure 3–3. TPA032D03 Class-D EVM Stand-Alone Connections for Mono BTL Output  
LED 1  
12 V  
R
5 V  
R
LED 0  
Fault  
Monitor  
SLOP310  
TPA032D03 EVM Board  
VCC  
GND  
Headphone  
Output Jack  
C1  
R4  
Right HP  
Input  
Mute  
Mode  
Mute  
SD  
S1  
Mute  
S2  
Shutdown  
Audio  
Line  
Inputs  
SD  
C3  
C4  
OUT–  
Left HP  
Input  
R2  
C2  
OUT+  
VDD GND  
VCC  
5 V  
Note: Capacitor C11 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design  
flexibility and allow decoupling capacitance to be added.  
3.7.1 Power Connections  
Power must be connected to both the VCC and VDD module pins. Power  
supply ground can be connected to any module ground pin, although best  
results are achieved if power supply grounds are connected to the pins  
adjacent to the VCC and VDD module pins. The ground and power wires  
should be twisted to reduce inductance and noise pickup if they are long.  
3-7  
Details  
 
Using The TPA032D03 Class-D EVM Stand-Alone  
3.7.2 Input Connections  
The class-D amplifier input signals can be connected in either of two ways:  
differential or single-ended. For differential operation, connect the signal  
source to the positive and negative inputs (IN+ and IN– module pins). For  
single-ended operation, the input signal line should be connected to the IN+  
module pin and the signal source ground wire should be connected to the  
IN– module pin.  
The EVM headphone amplifier inputs are single-ended, and the signal source  
should be connected to the RHP and LHP module pins. For best results, the  
ground of the signal source should be connected to the module GND pins at  
the EVM headphone inputs to provide a return path for the current.  
The input signal and ground wires should be twisted to reduce inductance and  
noise pickup if the lead lengths are long and the cable is not shielded.  
3.7.3 Output Connections  
The speaker should be connected between the OUT+ and the OUT– module  
pins. Inserting a plug into the EVM headphone jack switches the EVM to the  
headphone mode and shuts down the class-D amplifier section.  
3.7.4 Controls and Indicators  
The mute, mode, and shutdown functions may be controlled externally via the  
module Mute, Mode, and SD pins. An active-low input to the module Mute pin  
mutes the selected amplifier. An active-low input to the module Mode pin  
switches the EVM to the class-D mode and shuts off the headphone amplifier.  
An active-low input to the module SD pin shuts down the device. A signal of  
2 V or higher, allows normal operation.  
Note that the mute, mode, and shutdown signals applied to the EVM control  
input pins must be able to supply enough current to overcome the pullup  
resistor on the module (100 k).  
The fault indicator circuit can be monitored at FAULT0 (TP1) and FAULT1  
(TP2). These are open-drain outputs with 100-kresistors connected to VDD  
(5 V). A fault table is shown in Section 3.2.1 and in the device data sheet.  
3-8  
Details  
 
TPA032D03 Class-D EVM Bill of Materials  
3.8 TPA032D03 Class-D EVM Bill of Materials  
The components in the bill of materials (Table 3–4) were selected for their  
common values, availability, and the smallest size available to meet these  
criteria.  
Table 3–4.TPA032D03 Class-D EVM Bill of Materials  
EVM  
Qty.  
Manufacturer/  
Part Number  
Reference  
Description  
Size  
C1, C2, C15  
Capacitor, Ceramic Chip, 0.1 µF, ±10%,  
50 V, X7R  
0805  
3
Kemet  
C0805C104J5RAC  
C3, C4, C7, C8, Capacitor, Ceramic Chip, 1 µF, ±10%,  
C9, C12, C13,  
C23  
1206  
8
Kemet  
C1206C105K3RAC  
25 V, X7R  
C16  
Capacitor, Ceramic Chip, 0.047 µF, ±10%,  
0805  
0603  
0805  
1210  
1
2
2
1
2
Kemet  
C0805V473K5RAC  
50 V, X7R  
C17, C18  
C5, C6  
C10  
Capacitor, Ceramic Chip, 5.6 pF, ±5%,  
50 V, C0G,  
Kemet  
C0603C569J5GAC  
Capacitor, Ceramic Chip, 1 nF, ±5%,  
50 V, C0G,  
Kemet  
C0805C102J5GAC  
Capacitor, Ceramic Chip, 10 µF, +80%–20%,  
25 V, Y5V  
muRata  
GRM235Y5V106Z25  
C19, C20  
Capacitor, Aluminum Electrolytic, Radial Lead,  
33 µF, ±20%, 35 V, FC Series, 80 m@ 100  
kHz, 175 ma Ripple, –55°C to +105°C  
0.197” ×  
0.0197” ×  
0.078”  
Panasonic  
EEUFC1V333  
C21, C22  
Capacitor, Ceramic Chip, 0.22 µF, ±10%,  
1206  
2
1
Kemet  
C1206C224K5RAC  
50 V, X7R  
C11  
Not assembled  
0.492” ×  
0.0236” ×  
0.197”  
L1, L2  
Inductor, SMT, 15 µH, ±20%, 2.2 ADC, 47.2 m0.398” × 0.398”  
2
8
2
1
1
3
TDK  
@ 1 kHz, –20 to +90°C  
× 0.236”  
SLF10145T–150M2R2  
R1 – R7, R10  
R8, R9  
R13  
Resistor, Thick Film Chip, SMD, 100 k, ±5%,  
1/10 W, 100 V, –50 to 150°C, ±200 ppm/°C  
0603  
Vishay/Dale  
CRCW0603104J  
Resistor, Thick Film Chip, SMD, 1 k, ±5%, 1/10  
0603  
0603  
0603  
Vishay/Dale  
CRCW0603101J  
W, 100 V, –50 to 150°C, ±200 ppm/°C  
Resistor, Thick Film Chip, SMD, 500 k, ±5%,  
1/10 W, 100 V, –50 to 150°C, ±200 ppm/°C  
Vishay/Dale  
CRCW0603504J  
R14  
Resistor, Thick Film Chip, SMD, 150 k, ±5%,  
1/10 W, 100 V, –50 to 150°C, ±200 ppm/°C  
Vishay/Dale  
CRCW0603154J  
TP1 – TP3  
J1  
Test Points, Red  
Farnell  
240–345  
Mini Phone Jack, 3.5 mm, N/C, Stereo  
0.512” × 0.472”  
1
Mouser 161–3504  
Header Pins, Gold, Single, 0.5” Long, 0.25”  
Wide, 0.100” centers  
0.5”, 0.25”,  
0.1”  
16  
Samtec  
TSW–19–8–G–S  
S1, S2  
U1  
Switch, Momentary, Push Button, 12 VDC,  
50 mA  
0.291” × 0.138”  
2
1
Panasonic  
EVQ-PJS04K  
× 0.134”  
IC, Audio Amplifier, Class-D,  
10 W, 48 pin, DCA pkg  
TSSOP48  
TI  
TPA032D03DCA  
Capacitor C11 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design flexibility  
and allow decoupling capacitance to be added.  
3-9  
Details  
 
TPA032D03 Class-D EVM Schematic  
3.9 TPA032D03 Class-D EVM Schematic  
The TPA032D03 class-D EVM schematic is shown in Figure 3–4.  
Figure 3–4. TPA032D03 Class-D EVM Schematic Diagram  
J1  
VDD  
Ring  
R3  
100k  
R5  
100k  
R6  
100k  
3
B
A
2
Mode  
SD  
R8  
1k  
TIP  
Mute  
S1  
SD  
TPA032D03  
R9  
1k  
S2  
Mute  
1
1
48  
SHUTDOWN  
COSC  
AGND  
AGND  
AGND  
AGND  
AGND  
R1  
100k  
C5  
1000pF  
2
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
MUTE  
MODE  
3
4
5
6
7
8
Mode  
LIN–  
LIN+  
C3 1µF  
C4 1µF  
C6  
INN  
INP  
VDD  
VCC  
5 V  
1000pF  
COMP  
AGND  
VDD  
12 V  
C9  
1µF  
FAULT_0  
FAULT_1  
PVDD  
NC  
C10  
TP3  
TP2  
C8  
1µF  
C7 1µF  
C11  
10µF  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
VCC  
PVDD  
OUTP  
OUTP  
PGND  
PGND  
OUTN  
OUTN  
PVDD  
HPREG  
VCC  
VDD  
L1  
15µH  
C22  
NC  
LOUT+  
TP1  
R13  
500k  
0.22µF  
C21  
C23  
PGND  
PGND  
NC  
1µF  
L2  
15µH  
LOUT–  
TIP  
R14  
150k  
C12  
1µF  
0.22µF  
NC  
C19 33µF  
PVDD  
HPVCC  
RING  
RHP  
C20  
33µF  
C18  
5.6 pF  
C18  
R7  
100k  
R10  
100k  
HPLOUT  
HPLIN  
AGND  
PVDD  
VCP  
HPROUT  
HPRIN  
V2P5  
5.6 pF  
R2 100k  
C2 0.1µF  
LHP  
VCC  
R4  
100k  
C1  
C11  
1µF  
0.1µF  
PVDD  
PGND  
HPDR  
CP2  
HPDL  
CP1  
C13  
C15  
0.1µF  
1µF  
0.047µF  
C16  
Capacitor C11 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design flexibility  
and allow decoupling capacitance to be added.  
3-10  
Details  
 
TPA032D03 Class-D EVM PCB Layers  
3.10 TPA032D03 Class-D EVM PCB Layers  
The following illustrations depict the TPA032D03 class-D EVM PCB assembly  
andlayers. Thesedrawingsarenottoscale. Gerberplotscanbeobtainedfrom  
any TI Sales Office.  
Figure 3–5. TPA032D03 Class-D EVM Top Assembly  
Figure 3–6. TPA032D03 Class-D EVM Bottom Assembly  
3-11  
Details  
 
TPA032D03 Class-D EVM PCB Layers  
Figure 3–7. TPA032D03 Class-D EVM Top Layer  
Figure 3–8. TPA032D03 Class-D EVM Second Layer  
3-12  
Details  
 
TPA032D03 Class-D EVM PCB Layers  
Figure 3–9. TPA032D03 Class-D EVM Third Layer  
Figure 3–10. TPA032D03 Class-D EVM Bottom Layer  
3-13  
Details  
 
3-14  
Details  
 

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