Texas Instruments TPA6101A2 User Manual

TPA6101A2
Audio Power Amplifier
Evaluation Module

User’s Guide

2001 Mixed-Signal Products

SLOU104A

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stated by TI for

How to Use This Manual

This document contains the following chapters:

-

-

Information About Cautions and Warnings

Preface

Read This First

Chapter 1—Introduction
Chapter 2—Quick Start

Information About Cautions and Warnings

This book may contain cautions and warnings.

This is an example of a caution statement.
A caution statement describes a situation that could potentially

damage your software or equipment.

This is an example of a warning statement.
A warning statement describes a situation that could potentially

cause harm to you

The information in a caution or a warning is provided for your protection.
Please read each caution and warning carefully.

.

Read This First

iii

Running Title—Attribute Reference

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

TPA6101A2 50-mW Stereo Audio Power Amplifier (literature
number SLOS331) This is the data sheet for the TPA6101A2 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.

iv

Running Title—Attribute Reference

Contents

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

1.1 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

1.3 TP A6101A2 EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Quick Start 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 Reference 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.1 TPA6101A2 Filterless Class-D EVM Schematic 2-5. . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.2 TPA6101A2 Audio Power Amplifier Evaluation Module Parts List 2-6. . . . . . . . . .

2.4.3 TPA6101A2 EVM PCB Layers 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter Title—Attribute Reference

v

Running Title—Attribute Reference

Figures

1–1 The TI TPA6101A2 Audio Amplifier Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

2–2 Quick Start Module Map 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 TPA6101A2 Class-D EVM Schematic Diagram 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 TPA6101A2 EVM Top Layer 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 TPA6101A2 EVM Bottom Layer 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the

TP A6101A2 EVM 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 TPA6101A2 EVM Parts List 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi

Chapter 1

Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA6101A2
audio amplifier evaluation module (SLOP336). It includes a list of EVM
features, a brief illustrated description of the module, and a list of EVM
specifications.

Topic Page

1.1 Features 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Description 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 TP A6101A2 EVM Specifications 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

1-1

Features

1.1 Features

The TI TP A6101A2 audio amplifier evaluation module and the TI plug-n-play
audio amplifier evaluation platform include the following features:

-

TPA6101A2 Stereo Audio Power Amplifier Evaluation Module

J

1.6-V to 3.6-V operation

J

Fixed-gain of 2 dB (inverting)

J

Dual channel, single-ended operation

J

50-mW output power into 16 Ω at 3.3 V

J

Very low distortion — THD+N is less than 0.08% at 1 kHz and less than

0.2% from 20 Hz to 20 kHz into 16-Ω loads, and less than 0.06% at
1 kHz and less than 0.2% from 20 Hz to 20 kHz into 32-Ω loads

J

Extremely low current consumption in shutdown mode

J

Internal thermal and short-circuit protection

J

Internal pop reduction circuitry

-

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

Platform provides flexible power options

J

Jumpers on the platform select power and module control options

J

Switches on the platform route signals

J

Platform provides quick and easy audio input and output connections

-

Platform Power Options

J

Onboard 9-V battery

J

External 5-V – 15-V (VCC) supply inputs

J

External regulated VDD supply input

J

Socket for onboard 5-V VDD voltage regulator EVM

J

Onboard overvoltage and reverse polarity power protection

-

Platform Audio Input and Output Connections

J

Left and right RCA phono jack inputs

J

Miniature stereo phone jack input

J

Left and right RCA phono jack outputs

1-2

J

Left and right compression speaker terminal outputs

J

Miniature stereo headphone jack output

Introduction

1.2 Description

The TPA6101A2 audio power amplifier evaluation module is a complete,
low-power stereo audio power amplifier for high-fidelity line-level output,
headphone, and small speaker applications. It consists of the TI TP A6101A2
50-mW stereo audio power amplifier IC in a very small MSOP package, along
with a small number of other parts mounted on a circuit board that is
approximately one and a quarter inches square (see Figure 1–1).

Figure 1–1.The TI TPA6101A2 Audio Amplifier Evaluation Module

Description

†

Due to the very small size of the MSOP IC package, the standard part number TPA6101A2 is
replaced with the code TIAJM.

Single in-line header pins are mounted to the underside of the module circuit
board to allow the EVM to be plugged into the TI plug-n-play audio amplifier
evaluation platform, or to be wired directly into existing circuits and equipment
when used stand-alone.

The platform has room for a single TPA6101A2 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 hook up.

1.3 TPA6101A2 EVM Specifications

Supply voltage range, V
Supply current, I

DD

Continuous output power, P
Audio input voltage, V
Minimum load impedance, R

DD

: 16 Ω, V

O

I

L

DD

1.6 V to 3.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

160 mA, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

= 3.3 V 50 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VDD + 0.3 Vpp, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

1-3

1-4

Introduction

Chapter 2

Quick Start

The steps in this chapter can be followed to prepare the TPA6101A2 audio
amplifier EVM for use. Using the TPA6101A2 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 T able 2–1 are typical for the
TP A6101A2 EVM and will cause the TPA6101A2 IC to shutdown/mute when
a plug is removed from platform headphone jack J10.

Table 2–1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the

TPA6101A2 EVM

EVM JP6 JP7 JP8 S2 S3

TPA6101A2 X Lo X See Note 2 U5

Notes: 1) X = Don’t care

2) Set S2 to ON when signal conditioning board is installed in U1; set S2
to OFF when no signal conditioning board is installed.

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 Reference 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Quick Start

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
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 connector J1, J2, and/or VDD power

CC

6b

Power

Input

Audio

Input

6b

SUPPLY

7b

POWER

U6

F2

VR2

6a

Off Pwr

1

10

On

ICC
JP4

S1

6b

SOURCE

VCC

J1

In

+

DC

VCC(J1)

JP1

(J2)

JP2

AC/DC

Batt

JP3

VR1

F1

C1+

DC

D4

AC/DC

In

J2

In

Right

J3

D3

D2

D1

LED1

VCC

R1

Signal Conditioning

Stereo

8

J4

In

U1

B1

Audio
Power
Amps

IDD

JP5

U3 U4

R2

U2

LED2

VDD

Out

Out

In/Out

J7

Right

J8

+ – +–
Right

VDD

J6

+

Power
In/Out

Speaker

Headphone
Output

J10

R5

Output

9

Left

J5

In

TEXAS

INSTRUMENTS

1997

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

applied

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

ConditioningS2

GND

OnOff

TP1

U5

U2-U4

U5

HP

Source

HP(U5)

S3

R4

JP6

Polarity

Lo
Hi

JP7

+
+

R3

Out

Mode
Mute

Spk(U2-U4)

Out

JP8

Stereo

C3 C2

HP Out

Left

J9

Left

2-2

3

2

5

4

Quick Start

2.2 Quick Start List for Platform

Follow these steps when using the TPA6101A2 EVM with the TI plug-n-play
audio amplifier evaluation platform (see the platform user’s guide, literature
number SLOU011, for additional details). Numbered callouts for selected
steps are shown in Figure 2–1.

-

Platform preparations

1) Ensure that all external power sources are set to OFF and that the platform
power switch S1 is set to OFF.

2) Install a TP A6101A2 module in platform socket U5, taking care to align the
module pins correctly.

3) Use switch S2 to select or bypass the signal conditioning EVM (U1).

4) Set control signal polarity jumper JP7 to Lo.

5) Set Hp source switch S3 to U5 to route the output signal to the headphone
Jack (J10).

-

Power supply

Quick Start List for Platform

6) Select and connect the power supply:

7) Connect an external regulated power supply set to a voltage between 1.6
V and 3.6 V to platform V

power input connector J6, taking care to ob-

DD

serve marked polarity,

or

8) Install a 3-V to 5-V voltage regulator EVM (SL VP097 or equiv .) in platform
socket U6. Install a 9-V battery in B1 or connect a 7-V to 12-V power
source to a platform V

power input J1 or J2 and jumper the appropriate

CC

power input (see platform user’s guide). Set jumper JP1 on the SLVP097
to 3.3-V operation.

-

Inputs and outputs

9) Ensure that signal source level is set to minimum and that potentiometers
R1 and R4 are set to the midpoint.

10) Connect the audio source to left and right RCA phono jacks J3 and J5 or
stereo miniature phone jack J4.

11) Connect 16-Ω to 32-Ω headphones to headphone jack J10.

-

Power-up

12) 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 VDD, set

CC

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.

Quick Start

2-3

Quick Start List for Stand-Alone

2.3 Quick Start List for Stand-Alone

Follow these steps to use the TP A6101A2 EVM stand-alone or when connect­ing it into existing circuits or equipment. Connections to the TP A6101A2 mod­ule header pins can be made via individual sockets, wire-wrapping, or solder­ing to the pins, either on the top or the bottom of the module circuit board.
Numbered callouts for selected steps are shown in Figure 2–2.

Figure 2–2.Quick Start Module Map

5
4

4

2

6

6

†

Due to the very small size of the MSOP IC package, the standard part number TPA6101A2 is
replaced with the code TIAJM.

-

Power supply

1) Ensure that all external power sources are set to OFF.

2) Connect an external regulated power supply set between 1.6 V and 3.3 V
to the module VDD and GND pins taking care to observe marked polarity .

-

Inputs and outputs

3) Ensure that signal source level is set to minimum.

4) Connect the shutdown pin to V

5) Connect 32-Ω headphones to the module V

through a normally open switch.

DD

1 and VO2 pins through

O

33-µF to 1000-µF output-coupling capacitors (see Figure 3–8) and return
to the GND pin, or

6) For line output, connections to the V

1 and VO2 pins must be made

O

through 33-µF to 1000-µF output-coupling capacitors and returned to
GND.

-

Power-up

2-4

7) Verify correct voltage and input polarity and set the external power supply
to ON.

The EVM should begin operation.

Quick Start

2.4 Reference

2.4.1 TPA6101A2 EVM Schematic

The TPA6101A2 EVM schematic is shown in Figure 2–3.

Figure 2–3.TPA6101A2 EVM Schematic Diagram

C1

0.1 µF

RIN

TP A6101A2 EVM Schematic

LIN

C2

0.1 µF

C3

1 µF

1

BYPASS

2

GND

3

SHUTDOWN

4

IN2–

TPA6101A2

IN1–

VO1

V

DD

VO2

8

7

6

5

ROUT

C4

0.1 µF

R1
100 kΩ

S1

SHUTDOWN

V

DD

C5

+

10 µF

LOUT

Quick Start

2-5

TP A6101A2 Audio Power Amplifier Evaluation Module Parts List

2.4.2 TPA6101A2 Audio Power Amplifier Evaluation Module Parts List

Table 2–2.TPA6101A2 EVM Parts List

Ref. Description Size Qty.

C1, C2,C4Capacitor, 0.1 µF, ±10%,

Nonpolarized, SMD

C3 Capacitor, 1 µF, ±10%,

Nonpolarized, SMD

C5 Capacitor, 10 µF, 6.3 V,

SMD

R1 Resistor, 100 kΩ, 1/16 W,

5%, SMD

S1
(SHUT­DOWN)

U1 IC, TPA6101A2DGK APA,

PnP Pins Terminal post headers 11 Sullins Digi-Key

Switch, momentary , SMD 1 Panasonic

50 mW, 2 channel

0603 1 Murata

0603 1 Murata

A 1 Panasonic

0603 4 Panasonic

MSOP-8 1 TI

Manufacturer/

Part Number

GRM39X7R104K16

GRM39Y5V105Z010

ECS–TOJY106R

ERJ-3GSYJ104

EVQ–PJS04K

TPA6101A2DGK

Vendor/Number

Arrow
GRM39X7R104K16

Arrow
GRM39Y5V105Z010

Digi-Key
PCS1106CT-ND

Digi-Key
P100KGTR-ND

Digi-Key
P8048SCT-ND

S1022-36-ND

2.4.3 TPA6101A2 EVM PCB Layers

The following illustrations depict the TP A6101A2 PCB layers. These drawings
are not to scale. Gerber plots can be obtained from any TI sales office.

Figure 2–4.TPA6101A2 EVM Top Layer

Figure 2–5.TPA6101A2 EVM Bottom Layer

2-6

Quick Start