Texas Instruments Stereo Amplifier TPA0253 User Manual

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User’s Guide  
December 2000  
Mixed-Signal Products  
SLOU100  
 
Preface  
Related Documentation From Texas Instruments  
J
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.  
J
TPA0253 1-W Mono Audio Power Amplifier With Headphone  
Drive (literature number SLOS280) This is the data sheet for the  
TPA0253 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.  
iii  
 
iv  
 
Contents  
1
2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1  
1.1  
1.2  
1.3  
Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2  
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
TPA0253 EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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  
Stand-Alone Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5  
2.4.1 TPA0253 EVMs Connected for Stereo BTL Output . . . . . . . . . . . . . . . . . . . . . . . 2-5  
2.4.2 TPA0253 EVM Connected for SE Stereo Headphone Output . . . . . . . . . . . . . . 2-6  
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7  
2.5.1 EVM Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7  
2.5.2 EVM Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8  
2.5.3 Module PCB Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9  
2.5  
Figures  
1–1  
2–1  
2–2  
2–3  
2–4  
2–5  
2–6  
2–7  
2–8  
The TI TPA0253 Audio Amplifier Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
Module Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4  
TPA0253 EVMs Connected for Stereo BTL Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5  
TPA0253 EVM Connected for Single-Ended Stereo Headphone Output . . . . . . . . . . . . . . 2-6  
TPA0253 EVM Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7  
TPA0253 EVM PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9  
TPA0253 EVM Silkscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9  
TPA0253 EVM Bottom Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10  
Tables  
2–1  
2–2  
Platform Jumper and Switch Settings for the TPA0253 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3  
TPA0253 EVM Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8  
v
 
vi  
 
Chapter 1  
Introduction  
This chapter provides an overview of the Texas Instruments (TI) TPA0253  
audio amplifier evaluation module (SLOP270). 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 TPA0253 EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3  
1-1  
 
Feature Highlights  
1.1 Feature Highlights  
The TI TPA0253 audio amplifier evaluation module and the TI plug-n-play  
audio amplifier evaluation platform include the following features:  
- TPA0253 mono 1-W audio power amplifier with stereo headphone drive  
evaluation module  
J
Single channel, bridge-tied load (BTL) or dual-channel single-ended  
operation  
J
J
J
J
J
Internal summing of left and right channels to generate mono signal  
1 W output power into 8 at 5 V, BTL  
0.3 W output power into 8 at 3 V, BTL  
Low current consumption in shutdown mode (1 µA)  
Stereo headphone drive  
- Quick and easy configuration with the TI plug-n-play audio amplifier  
evaluation platform  
J
Evaluation module is designed to simply plug into the platform,  
automatically making all signal, control, and power connections  
J
J
J
J
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  
J
J
J
J
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  
J
J
J
J
J
Left and right RCA phono jack inputs  
Miniature stereo phone jack input  
Mono (right) RCA phono jack output  
Mono (right) compression speaker terminal output  
Miniature stereo headphone jack output  
1-2  
Introduction  
 
Description  
1.2 Description  
The TPA0253 audio power amplifier evaluation module is a complete 1-watt  
mono audio power amplifier with stereo headphone drive. It consists of the TI  
TPA0253 mono 1-W audio power amplifier IC along with a small number of  
other parts mounted on a circuit board that measures approximately 2 1/4  
inches by 1 1/2 inches (Figure 1–1).  
Figure 1–1. The TI TPA0253 Audio Amplifier Evaluation Module  
VDD  
GND  
RO/MO+  
GND  
TEXAS  
INSTRUMENTS  
2000  
LO/MO+  
GND  
RIN  
STEREO/MONO  
C6  
R3  
C8  
+
C7  
+
R4  
R2  
U1  
R8  
C1  
R7  
SHUTDOWN  
R6  
S1  
R9  
LIN  
C2  
C5  
GND  
C3  
SHUTDOWN  
J1  
GND  
VDD  
GND  
TPA0253 EVM Board  
SLOP270  
Single in-line header pins extend from 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 TPA0253 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  
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 TPA0253 EVM Specifications  
Supply voltage range, V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 V to 5.5 V  
DD  
Supply current, I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A max  
DD  
Continuous output power per channel, P : 8-BTL, V =5 V . . . . . . . 1 W  
O
DD  
Audio input voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Vp–p max  
I,  
Minimum load impedance, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ω  
L
1-3  
Introduction  
 
1-4  
Introduction  
 
Chapter 2  
Operation  
Quick start lists in this chapter contain steps that can be followed to quickly  
prepare the TI plug-n-play audio amplifier evaluation platform for use with the  
TPA0253 audio amplifier EVM, or to connect the TPA0253 audio amplifier  
EVM for stand-alone operation.  
Using the TPA0253 audio amplifier evaluation module with the TI evaluation  
platform is a quick and easy way to connect power, signal and control inputs,  
and signal outputs to the EVM, using standard connectors.  
TheTPA0253audioamplifierevaluationmodulecanalsobeusedstand-alone  
by making connections directly to the module pins, and it can be wired directly  
into existing circuits or equipment. Stand-alone connection diagrams appear  
below.  
A schematic, parts list, and PCB and layer illustrations for the EVM are  
included in the Reference section of this chapter.  
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  
2.4 Stand-Alone Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5  
2.5 Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7  
2-1  
 
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  
5b  
5b  
5b  
1
9
ICC  
JP4  
C1+  
F1  
VR1  
5a  
DC  
Power  
In/Out  
5b  
Power  
Input  
R2  
R1  
Audio  
Power  
Amps  
Signal Conditioning  
7
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  
R5  
4
3
2
2-2  
 
2.2 Quick Start List for Platform  
FollowthesestepswhenusingtheTPA0253EVMwiththeTIplug-n-playaudio  
amplifier evaluation platform (see the platform user’s guide, SLOU011, for  
additional details). Table 2–1 shows typical platform jumper and switch  
settings and numbered callouts for selected steps appear in Figure 2–1.  
Table 2–1. Platform Jumper and Switch Settings for the TPA0253  
EVM  
P-N-P Platform  
Notes: 1) X = Don’t care  
JP6  
Mode  
JP7  
JP8  
Hi  
S2  
S3  
X
Note 2  
X
2) Set S2 to ON when signal conditioning board is installed in U1; set S2  
to OFF when no signal conditioning board is installed.  
- Platform preparations  
1) EnsurethatallexternalpowersourcesaresettoOFF andthattheplatform  
power switch S1 is set to OFF.  
2) Install a TPA0253 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).  
4) Set Mode/Mute jumper JP6 to Mode and Polarity jumper JP8 to Hi.  
- Power supply  
5) Select and connect the power supply (ensure power supply is set to OFF ):  
a) Connectanexternalregulatedpowersupplysetto5VtoplatformV  
DD  
power input connector J6 taking care to observe marked polarity,  
or  
b) Install a voltage regulator EVM (SLVP097 or equiv.) in platform socket  
U6. Connect a 7 V – 12 V power source to a platform V power input  
CC  
J1 or J2 and jumper the appropriate power input (see platform user’s  
guide).  
- Inputs and outputs  
6) Ensure that the audio signal source level is set to minimum.  
7) Connect the audio source to left and right RCA phono jacks J3 and J5 or  
stereo miniature phone jack J4.  
8) Connect the speaker to the right RCA jack J7 or to the stripped wire  
speaker connector J8. Make sure the speaker is connected to the  
Right + and – terminals.  
- Power-Up  
9) 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.  
10) Adjust the signal source level or adjust potentiometers R2 and R4 on the  
EVM as needed.  
2-3  
 
2.3 Quick Start List for Stand-Alone  
Follow these steps to use the TPA0253 EVM stand-alone or when connecting  
it into existing circuits or equipment. Connections to the TPA0253 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 appear in Figure 2–2.  
Figure 2–2. Module Map  
2
VDD  
TEXAS  
GND  
RO/MO+  
GND  
INSTRUMENTS  
2000  
LO/MO+  
GND  
RIN  
5
4
STEREO/MONO  
C6  
R3  
C8  
+
C7  
+
R4  
R2  
U1  
R8  
6
8
C1  
R7  
SHUTDOWN  
S1  
R9  
R6  
LIN  
C2  
4
C5  
GND  
C3  
SHUTDOWN  
J1  
GND  
VDD  
GND  
TPA0253 EVM Board  
SLOP270  
5
- 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.  
- Inputs and outputs  
3) Ensure that audio signal source level adjustments are set to minimum.  
4) Connect the right (left) positive lead of the audio source to the module RIN  
(LIN) pins and the negative lead to the GND pin.  
5) Connect a speaker to the module RO/MO+ and LO/MO– pins OR plug a  
headphone into to EVM headphone jack J1.  
- Evaluation module preparations  
6) Adjust EVM potentiometers R2 and R4 to approximately mid point.  
- Power-up  
7) Verify correct voltage and input polarity and set the external power supply  
to ON.  
The EVM should begin operation.  
8) Adjust the signal source level or adjust potentiometers R2 and R4 on the  
EVM as needed.  
2-4  
 
2.4 Stand-Alone Connection Diagrams  
The power supply range is 2.5 V to 5.5 V and isolated RO/MO+ and LO/MO–  
lines for BTL operation are required.  
Note that the source of any shutdown signal applied to the EVM SHUTDOWN  
pin must be able to sink the current flowing through the pullup resistor on the  
module (100 k) when the pin is held low.  
2.4.1 TPA0253 EVMs Connected for Stereo BTL Output  
Figure 2–3 shows two TPA0253 EVMs connected for stereo BTL operation.  
Figure 2–3. TPA0253 EVMs Connected for Stereo BTL Output  
5 VDC  
VDD  
TEXAS  
INSTRUMENTS  
2000  
GND  
RO/MO+  
GND  
Right  
LO/MO+  
GND  
RIN  
Audio  
Input  
STEREO/MONO  
C6  
(Right)  
R3  
C8  
+
C7  
+
R4  
R2  
U1  
R8  
C1  
R7  
SHUTDOWN  
R6  
S1  
R9  
LIN  
C2  
C5  
GND  
C3  
SHUTDOWN  
J1  
GND  
VDD  
GND  
TPA0253 EVM Board  
SLOP270  
5 VDC  
GND  
VDD  
GND  
RO/MO+  
TEXAS  
INSTRUMENTS  
2000  
GND  
Left  
LO/MO+  
GND  
STEREO/MONO  
RIN  
C6  
R3  
C8  
+
C7  
+
R4  
R2  
U1  
R8  
C1  
R7  
SHUTDOWN  
R6  
S1  
R9  
Audio  
Input  
(Left)  
LIN  
C2  
C5  
GND  
C3  
SHUTDOWN  
J1  
GND  
VDD  
GND  
TPA0253 EVM Board  
SLOP270  
2-5  
 
2.4.2 TPA0253 EVM Connected for Single-Ended Stereo Headphone Output  
Figure 2–4 shows a TPA0253 EVM connected for single-ended stereo  
headphone operation.  
Figure 2–4. TPA0253 EVM Connected for Single-Ended Stereo Headphone Output  
5 VDC  
VDD  
TEXAS  
GND  
RO/MO+  
GND  
INSTRUMENTS  
2000  
LO/MO+  
GND  
RIN  
Audio  
Input  
STEREO/MONO  
5 VDC  
C6  
(Right)  
R3  
C8  
+
C7  
+
R4  
R2  
U1  
R8  
C1  
R7  
SHUTDOWN  
R6  
S1  
Audio  
Input  
(Left)  
R9  
LIN  
C2  
C5  
GND  
C3  
SHUTDOWN  
J1  
GND  
VDD  
GND  
TPA0253 EVM Board  
SLOP270  
Left  
Right  
GND  
2-6  
 
2.5 Reference  
ThissectionincludestheTPA0253EVMschematic, theEVMpartslist, andthe  
module PCB layers.  
2.5.1 EVM Schematic  
Figure 2–5 shows the TPA0253 EVM schematic.  
Figure 2–5. TPA0253 EVM Schematic Diagram  
R2 50 k  
C2  
0.47 µF  
C7  
220 µF  
TPA0253  
R3  
12 kΩ  
L
IN  
1
2
3
10  
9
C1  
1 µF  
L /M –  
FILT_CAP L /M  
O
O
O
O
SHUT  
DOWN  
R6  
1 kΩ  
SD  
L
IN  
8
R1  
100 kΩ  
NO  
S1  
V
GND  
ST/M  
DD  
4
5
7
6
J1  
R9  
1 kΩ  
BYPASS  
R4 50 kΩ  
C6  
0.47 µF  
R
R
/M  
O O  
IN  
C8  
220 µF  
R5  
12 kΩ  
R
R8  
100 kΩ  
C5  
0.47 µF  
IN  
R /M +  
O
O
V
DD  
STEREO/  
MONO  
C3  
10 µF  
C4  
1 µF  
R7 100 kΩ  
GND  
2-7  
 
2.5.2 EVM Parts List  
Table 2–2 is the TPA0253 EVM parts list.  
Table 2–2.TPA0253 EVM Parts List  
EVM  
Qty.  
Manufacturer/  
Part Number  
Ref.  
Description  
Size  
Vendor Number  
C1, C4  
Capacitor, 1 µF @ 16 V,  
+80%/–20%, nonpolarized  
1206  
2
Murata  
Arrow  
GRM42-6Y5V105Z16BL GRM426Y5V105Z  
016  
C2, C5, Capacitor, 0.47 µF @ 16 V  
0805  
A
3
Murata  
GRM40-Y5V474Z16  
Arrow  
GRM40Y5V474Z  
016  
C6  
+80%/–20%, nonpolarized  
Capacitor, 10 µF @ 6.3 V  
Capacitor, 220 µF @ 10 V  
C3  
1
2
2
2
3
2
1
1
Panasonic  
ECS–TOJY106R  
Digi-Key  
PCS1106CT–ND  
C7, C8  
R2, R4  
R6, R9  
7.3 mm (L)  
4.3 mm (W)  
Sanyo “POSCAP”  
10TPB220M  
Potentiometer, 50 k, 1/2 W,  
through-hole  
Bourns  
3323P–50K  
Digi-Key  
3323P–503–ND  
Resistor, 1 k, 1/10 W, 5%  
0805  
0805  
0805  
Panasonic  
ERJ-6GEYJ102V  
Digi-Key  
P1.0KACT-ND  
R1, R7, Resistor, 100 k, 1/10 W,  
Panasonic  
ERJ-6GEYJ104V  
Digi-Key  
P100KACT-ND  
R8  
5%  
R3, R5  
Resistor, 12 k, 1/10 W, 5%  
Panasonic  
ERJ-6GEYJ123V  
Digi-Key  
P12KACT-ND  
S1  
J1  
Switch, momentary  
Panasonic  
EVQ–PJS04K  
Digi-Key  
P8050SCT-ND  
MINI STEREO PHONE  
JACK, PCB MOUNT  
3.5 mm  
Mouser  
161–3504  
Terminal Post Headers  
14  
1
Sullins  
PTC36SABN  
Digi-Key  
S1022-36-ND  
U1  
IC, TPA0253 1-W mono  
audio amplifier  
MSOP-10  
TI  
TPA0253DGN  
2-8  
 
2.5.3 Module PCB Layers  
The following illustrations depict the TPA0253 EVM PCB layers and  
silkscreen. Thesedrawingsarenottoscale. Gerberplotscanbeobtainedfrom  
any TI Sales Office.  
Figure 2–6. TPA0253 EVM PCB  
Figure 2–7. TPA0253 EVM Silkscreen  
2-9  
 
Figure 2–8. TPA0253 EVM Bottom Layer  
2-10  
 

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