Texas Instruments TPA0243 User Manual


  
 

User’s Guide

December 2000 Mixed-Signal Products

SLOU099

IMPORTANT NOTICE

T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those
pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty . Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.

Customers are responsible for their applications using TI components.
In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent

that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

Copyright  2000, Texas Instruments Incorporated

Related Documentation From Texas Instruments



TI Plug-N-Play Audio Amplifier Evaluation Platform

number SLOU011) provides detailed information on the evaluation
platform and its use with TI audio evaluation modules.



TPA0243 2-W Mono Audio Power Amplifier With Headphone

(literature number SLOS279) This is the data sheet for the

Drive

TPA0243 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.

Preface

(literature

Chapter Title—Attribute Reference

iii

iv

Running Title—Attribute Reference

Contents

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Feature Highlights 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 TP A0243 EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Operation 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.1 TPA0243 EVMs Connected for Stereo BTL Output 2-5. . . . . . . . . . . . . . . . . . . . . . .

2.4.2 TPA0243 EVM Connected for SE Stereo Headphone Output 2-6. . . . . . . . . . . . . .

2.5 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

1–1 The TI TPA0243 Audio Amplifier Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 Quick Start Platform Map 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Module Map 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 TPA0243 EVMs Connected for Stereo BTL Output 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 TPA0243 EVM Connected for Single-Ended Stereo Headphone Output 2-6. . . . . . . . . . . . . .

2–5 TPA0243 EVM Schematic Diagram 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–6 TPA0243 EVM PCB 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–7 TPA0243 EVM Silkscreen 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–8 TPA0243 EVM Bottom Layer 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T ables

2–1 Platform Jumper and Switch Settings for the TPA0243 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 TPA0243 EVM Parts List 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

v

vi

Chapter 1

Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA0243
audio amplifier evaluation module (SLOP269). 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 TP A0243 EVM Specifications 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

1-1

Feature Highlights

1.1 Feature Highlights

The TI TPA0243 audio amplifier evaluation module and the TI plug-n-play
audio amplifier evaluation platform include the following features:

 TPA0243 mono 2-W audio power amplifier with stereo headphone drive

evaluation module

 Single channel, bridge-tied load (BTL) or dual-channel single-ended

 Internal summing of left and right channels to generate mono signal
 2 W output power into 4 Ω at 5 V, BTL
 0.6 W output power into 4 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

 Evaluation module is designed to simply plug into the platform,

operation

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 DC V
 External regulated V
 Socket for onboard 5 V/3.3 V V
 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
 Mono (right) RCA phono jack output
 Mono (right) compression speaker terminal output
 Miniature stereo headphone jack output

DD

supply inputs

CC

supply input

voltage regulator EVM

DD

1-2

Introduction

1.2 Description

The TPA0243 audio power amplifier evaluation module is a complete 2-watt
mono audio power amplifier with stereo headphone drive. It consists of the TI
TPA0243 mono 2-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 TPA0243 Audio Amplifier Evaluation Module

Description

GND
RIN

C6

R4

R2

LIN

C2

GND

TPA0243 EVM Board

TEXAS
INSTRUMENTS
2000

S1

R1

SHUTDOWN

VDD GND

R3

C1

VDD GND

U1

R5

C4

C5

C3

C8 C7

+

R9 R6

RO/MO+

LO/MO+

STEREO/MONO

+

R8

R7

SHUTDOWN

J1

SLOP269

GND

GND

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 TPA0243 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,
and connects them to a versatile array of standard audio input and output jacks
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

1.3 TPA0243 EVM Specifications

Supply voltage range, V
Supply current, I

Continuous output power per channel, PO: 4-Ω BTL, VDD=5 V 2 W. . . . . . .

Audio input voltage, V
Minimum load impedance, R

DD

hook up

DD

I,

L

.

2.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1A max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Vp–p max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

1-3

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
TPA0243 audio amplifier EVM, or to connect the TPA0243 audio amplifier
EVM for stand-alone operation.

Using the TPA0243 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.

The TP A0243 audio amplifier evaluation module can also be used stand-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 VCC power input connector J1, J2, and/or VDD power
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

Power

Input

Audio
Input

5b

5b

SOURCE

VCC

J1

In

+

DC

VCC(J1)

JP1

(J2)

JP2

AC/DC

Batt

JP3

VR1

F1

C1+

Off Pwr

1

9

On

ICC
JP4

S1

5b 5b

SUPPLY

POWER

U6

F2

VR2

5a
DC

VDD

J6

Power
In/Out

+

8

Audio
Power
Amps

S2

B1

IDD

JP5

U3 U4

R2

U2

LED2

VDD

Out

Out

In/Out

J7

Right

J8

+– +–
Right

D4 J2

AC/DC

In

In

Right

J3

D3

D2

D1

LED1

VCC

R1

Signal Conditioning

Stereo

J4

7

In

U1

Speaker
Output

Headphone

Output

Left

J5

In

TEXAS

INSTRUMENTS

1997

Plug-N-Play Audio Amplifier
Evaluation Platform
SLOP097 Rev. C.1

****CAUTION****
Do not insert or remove
EVM boards with power

applied

OnOff

Conditioning

TP1

GND

U5

U2-U4

U5

HP

Source

HP(U5)

S3

R4

JP6

Polarity

Lo
Hi

JP7

+
+

R3

Out

Mode

Mute

Spk(U2-U4)

Out

JP8

C3 C2

HP Out

Left

J9

Left

Stereo

J10

R5

2-2

23

4

2.2 Quick Start List for Platform

Follow these steps when using the TP A0243 EVM with the TI plug-n-play audio
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 TPA0243

EVM JP6 JP7 JP8 S2 S3

P-N-P Platform Mode X Hi Note 2 X

Notes: 1) X = Don’t care

 Platform preparations

2) Set S2 to
to

OFF

when no signal conditioning board is installed.

ON

when signal conditioning board is installed in U1; set S2

1) Ensure that all external power sources are set to
power switch S1 is set to

OFF.

OFF

and that the platform

2) Install a TPA0243 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).

Mode

4) Set Mode/Mute jumper JP6 to

 Power supply

and Polarity jumper JP8 to

5) Select and connect the power supply (ensure power supply is set to
a) Connect an external regulated power supply set to 5 V to platform V

power input connector J6 taking care to observe marked polarity,
or

b) Install a voltage regulator EVM (SL VP097 or equiv .) in platform socket

U6. Connect a 7 V – 12 V power source to a platform V
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.

power input

CC

Hi.

OFF

):

DD

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 VCC and an onboard regulator EVM are used to provide VDD, set

platform power switch S1 to

ON.

Platform LED2 should light indicating the presence of VDD, and the evaluation
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 TP A0243 EVM stand-alone or when connecting
it into existing circuits or equipment. Connections to the TPA0243 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

GND

4

RIN

C6

6
8

4

R4

R2

LIN

C2

GND

TPA0243 EVM Board

TEXAS
INSTRUMENTS
2000

S1

R1

SHUTDOWN

2

VDD GND

R3

C1

VDD GND

U1

R5

C4

C5

C3

C8 C7

+

R9 R6

RO/MO+

LO/MO+

STEREO/MONO

+

R8

R7

SHUTDOWN

J1

5

GND

5

GND

SLOP269

 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
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.

OR

plug a

2-4

8) Adjust the signal source level or adjust potentiometers R2 and R4 on the
EVM as needed.

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 TPA0243 EVMs Connected for Stereo BTL Output

Figure 2–3 shows two TPA0243 EVMs connected for stereo BTL operation.

Figure 2–3.TPA0243 EVMs Connected for Stereo BTL Output

5 VDC

Audio

Input

(Right)

Audio

Input
(Left)

GND
RIN

C6

R4

R2

LIN

C2

GND

TPA0243 EVM Board

GND
RIN

C6

R4

R2

LIN

C2

GND

TPA0243 EVM Board

VDD GND

TEXAS
INSTRUMENTS
2000

C1

S1

R1

C4

SHUTDOWN

C3

VDD GND

5 VDC GND

VDD GND

TEXAS
INSTRUMENTS
2000

C1

S1

R1

C4

SHUTDOWN

C3

VDD GND

RO/MO+

GND

LO/MO+

STEREO/MONO

R3

R3

C5

U1

C5

U1

R5

R5

C8 C7

+

R9 R6

C8 C7

+

R9 R6

+

R8

R7

SHUTDOWN

J1

RO/MO+

LO/MO+

STEREO/MONO

+

R8

R7

SHUTDOWN

J1

GND

SLOP269

GND

GND

SLOP269

Right

Left

2-5

2.4.2 TPA0243 EVM Connected for Single-Ended Stereo Headphone Output

Figure 2–4 shows a TPA0243 EVM connected for single-ended stereo
headphone operation.

Figure 2–4.TPA0243 EVM Connected for Single-Ended Stereo Headphone Output

5 VDC

Audio

Input

(Right)

Audio

Input
(Left)

GND
RIN

C6

R4

R2

LIN

C2

GND

TPA0243 EVM Board

TEXAS
INSTRUMENTS
2000

S1

R1

SHUTDOWN

VDD GND

R3

C1

VDD GND

U1

R5

C4

C5

C3

C8 C7

+

R9 R6

RO/MO+

LO/MO+

STEREO/MONO

+

R8

R7

SHUTDOWN

J1

SLOP269

Left
Right

GND

GND

5 VDC

GND

2-6

2.5 Reference

This section includes the TP A0243 EVM schematic, the EVM parts list, and the
module PCB layers.

2.5.1 EVM Schematic

Figure 2–5 shows the TPA0243 EVM schematic.

Figure 2–5.TPA0243 EVM Schematic Diagram

L

SHUT

DOWN

R

V

DD

GND

IN

IN

C2

0.47 µF

C6

0.47 µF

R2 50 kΩ

S1

R4 50 kΩ

10 µF

C3

NO

R3

12 kΩ

R1

100 kΩ

R5

12 kΩ

1 µF

C4

C1

1 µF

1

FILT_CAP

2

SD

3

V

DD

4

BYPASS

5

R

IN

C5

0.47 µF

TPA0243

LO/M

GND

ST/M

RO/M

100 kΩ

R7 100 kΩ

C7

220 µF

10

O

9

L

IN

8
7

6

O

R8

R6

1 kΩ

R9

1 kΩ

C8
220 µF

LO/MO–

R

O/MO

J1

+

STEREO/
MONO

2-7

2.5.2 EVM Parts List

Table 2–2 is the TPA0243 EVM parts list.

Table 2–2.TPA0243 EVM Parts List

Ref. Description Size

C1, C4 Capacitor, 1 µF @ 16 V,

+80%/–20%, nonpolarized

C2, C5,C6Capacitor, 0.47 µF @ 16 V

+80%/–20%, nonpolarized

C3 Capacitor, 10 µF @ 6.3 V A 1 Panasonic

C7, C8 Capacitor , 220 µF @ 10 V 7.3 mm (L)

R2, R4 Potentiometer, 50 kΩ, 1/2 W,

through-hole

R6, R9 Resistor, 1 kΩ, 1/10 W, 5% 0805 2 Panasonic

R1, R7,R8Resistor, 100 kΩ, 1/10 W,

5%

R3, R5 Resistor, 12 kΩ, 1/10 W, 5% 0805 2 Panasonic

S1 Switch, momentary 1 Panasonic

J1 MINI STEREO PHONE

JACK, PCB MOUNT

1206 2 Murata

0805 3 Murata

4.3 mm (W)

0805 3 Panasonic

3.5 mm 1 Mouser

EVM

Qty.

2 Sanyo “POSCAP”

2 Bourns

Manufacturer/

Part Number

GRM42-6Y5V105Z16BL

GRM40-Y5V474Z16

ECS–TOJY106R

10TPB220M

3323P–50K

ERJ-6GEYJ102V

ERJ-6GEYJ104V

ERJ-6GEYJ123V

EVQ–PJS04K

Vendor Number

Arrow
GRM426Y5V105Z
016

Arrow
GRM40Y5V474Z
016

Digi-Key
PCS1106CT–ND

Digi-Key
3323P–503–ND

Digi-Key
P1.0KACT-ND

Digi-Key
P100KACT-ND

Digi-Key
P12KACT-ND

Digi-Key
P8050SCT-ND

161–3504

Terminal Post Headers 14 Sullins

U1 IC, TPA0243 2-W mono

audio amplifier

PTC36SABN

MSOP-10 1 TI

TPA0243DGN

Digi-Key
S1022-36-ND

2-8

2.5.3 Module PCB Layers

The following illustrations depict the TPA0243 EVM PCB layers and
silkscreen. These drawings are not to scale. Gerber plots can be obtained from
any TI Sales Office.

Figure 2–6.TPA0243 EVM PCB

Figure 2–7.TPA0243 EVM Silkscreen

2-9

Figure 2–8.TPA0243 EVM Bottom Layer

2-10