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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 Ω at 5 V, BTL
0.3 W output power into 8 Ω 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-Ω 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 kΩ) 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 kΩ
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 kΩ, 1/2 W,
through-hole
Bourns
3323P–50K
Digi-Key
3323P–503–ND
Resistor, 1 kΩ, 1/10 W, 5%
0805
0805
0805
Panasonic
ERJ-6GEYJ102V
Digi-Key
P1.0KACT-ND
R1, R7, Resistor, 100 kΩ, 1/10 W,
Panasonic
ERJ-6GEYJ104V
Digi-Key
P100KACT-ND
R8
5%
R3, R5
Resistor, 12 kΩ, 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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