Texas Instruments TPA2000D4 User manual

TPA2000D4
Filterless Class D With
Stereo Headphone
Audio Power Amplifier EVM
2001 Mixed-Signal Products
User’s Guide
SLOU091A

iii
Read This First
Preface
How to Use This Manual
This document contains the following chapters:
- Chapter 1—Introduction
- Chapter 2—Operation
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.
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
testedforcompliancewiththelimitsofcomputingdevicespursuanttosubpart
Jofpart15ofFCCrules,whicharedesignedtoprovidereasonableprotection
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
v
Chapter Title—Attribute Reference
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Feature Highlights 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TPA2000D4 EVM Specifications 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Reference 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.1 TPA2000D4 Audio Power Amplifier EVM Parts List 2-7. . . . . . . . . . . . . . . . . . . . . .
2.4.2 TPA2000D4 Filterless Class-D EVM Schematic 2-8. . . . . . . . . . . . . . . . . . . . . . . . .
2.4.3 TPA2000D4 Filterless Class-D EVM PCB Layers 2-9. . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference
vi
Figures
1–1 The TI TPA2000D4 Audio Amplifier EVM—Top View 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 Quick Start Platform Map 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 Module Preparation 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 Quick Start Module Map 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–4 TPA2000D4 Class-D EVM Schematic Diagram 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–5 TPA2000D4 Filterless Class-D EVM Top Assembly 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–6 TPA2000D4 Filterless Class-D EVM Bottom Assembly 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA2000D4 2-1. . . . . .
2–2 Typical TPA2000D4 EVM Jumper Settings 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 Platform Jumper and Switch Settings for the TPA2000D4 2-3. . . . . . . . . . . . . . . . . . . . . . . . . .
2–4 Typical TPA2000D4 EVM Jumper Settings 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–5 TPA2000D4 EVM Gain Settings 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–6 TPA2000D4 EVM Parts List 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction
Introduction
This chapter provides an overview of the Texas Instruments (TI) TPA2000D4
filterless class-D audio with stereo headphone amplifier evaluation module
(SLOP329). It includes a list of EVM features, a brief illustrated description of
the module, and a list of EVM specifications.
Topic Page
1.1 Feature Highlights 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TPA2000D4 EVM Specifications 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Feature Highlights
1-2 Introduction
1.1 Feature Highlights
The TI TPA2000D4 audio amplifier evaluation module and the TI plug-n-play
audio amplifier evaluation platform include the following features:
- TPA2000D4Stereo2-WFilterlessClass-DWithStereoHeadphoneAudio
Power Amplifier Evaluation Module
J Class-D without output filter
J Stereo headphone output jack
J Internal depop circuitry to minimize transients in outputs
J High efficiency
J Low distortion
J Low supply current (9 mA for class-D, 7 mA for stereo headphone)
J 2 W per channel output power into 4 Ωat 5 V
J Low current consumption in shutdown mode
J Four selectable gain settings: 5, 11, 17, and 23 dB
J Differential stereo inputs
J 32-pin TSSOP PWP package
- 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 Platformprovides quick andeasyaudio input andoutputconnections
- Platform Power Options
J External 5-V –15-V dc VCC supply inputs
J External regulated VDD supply input
J Socket for onboard 5 V/3.3 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
J Left and right compression speaker terminal outputs
J Miniature stereo headphone jack output

Description
1-3
Introduction
1.2 Description
The TPA2000D4 filterless class-D stereo audio power amplifier evaluation
module is a complete, 2-W per channel class-D stereo audio power amplifier
with stereo headphone output jack that can operate without an output filter. It
consists of the TI TPA2000D4 class-D stereo 2-W audio power amplifier IC
with stereo headphone output jack, along with a small number of other parts
mountedonacircuitboardthatmeasuresapproximately2-1/4inchesby1-1/2
inches (see Figure 1–1).
Figure 1–1.The TI TPA2000D4 Audio Amplifier EVM—Top View
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
evaluationplatform,ortobewireddirectlyintoexistingcircuitsandequipment
when used stand-alone.
The platform has room for a single TPA2000D4 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.

TPA2000D4 EVM Specifications
1-4 Introduction
1.3 TPA2000D4 EVM Specifications
Supply voltage range, VDD 4.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, IDD 2 A max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power per channel, BTL, PO: 4 Ω, VDD = 5 V 2 W. . . . . . . . . . . . . . . . . . . . . .
Continuous output power per channel, headphones, PO: 32 Ω, VDD = 5 V 85 mW. . . . . . . . . .
Minimum load impedance, BTL, RL3 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum load impedance, headphone, RL16 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1
Operation
Operation
The steps in this chapter can be followed to quickly prepare the TPA2000D4
filterless class-D audio amplifier EVM for use. Using the TPA2000D4 with the
TI plug-n-play audio amplifier evaluation platform is a quick and easy way to
connectpower, signal and controlinputs,andsignaloutputs to the EVMusing
standard connectors. However, the audio amplifier evaluation module can be
used stand-alone by making connections directly to the module pins, and can
be wired directly into existing circuits or equipment.
Theplatformswitchandjumper settings shown in Table2–1aretypicalforthe
TPA2000D4 EVM and will cause the TPA2000D4 to shut down when a plug
is inserted into platform headphone jack J10.
Table 2–1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the
TPA2000D4
EVM JP4 JP5 JP6 JP7 JP8 S2 S3
P-N-P Platform X ON Mute X Lo Note 2 U5
Notes: 1) ON = Jumper installed, OFF = Jumper NOT Installed, X = Don’t care
2) SetS2 to ONwhensignalconditioning board isinstalledinU1; setS2
to OFF when no signal conditioning board is installed.
Table 2–2. Typical TPA2000D4 EVM Jumper Settings
EVM GAIN0 GAIN1
TPA2000D4 ON ON
Note: ON = Jumper installed, OFF = Jumper NOT Installed, X = Don’t care
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Reference 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Precautions
2-2 Operation
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
Signal Conditioning
****CAUTION****
Do not insert or remove
EVM boards with power
applied
ICC
JP4
F1
VR1
R1
JP3
JP2 JP1 AC/DC
(J2)
VCC(J1)
D1 D2 D3
D4 J2
J3 J4 J5
AC/DC
In
VCC
In
+
J1
DC
SOURCE
LED1 VCC
LED2 VDD
R2
JP5 IDD
B1
U6
POWER
SUPPLY
U3 U4
U5
U1
U2
Audio
Power
Amps
OnOff ConditioningS2
J7 J8 Right
Out Left
Out
+–+–
JP6
Mode
Mute
Spk(U2-U4)
JP8
J9 Left
Out
JP7
S3 HP Source
U2-U4
U5
Polarity
Lo
Hi
HP(U5)
C3 C2
++
R3
R5
J10
Stereo
HP Out
TP1
GND
Plug-N-PlayAudio Amplifier
Evaluation Platform
SLOP097 Rev. C.1
Stereo
In
Right
In Left
In
J6 In/Out VDD
F2
VR2 +
DC
Power
In/Out
Speaker
Output
Headphone
Output
Audio
Input
Power
Input
Batt
C1+
Right
Out
On Off Pwr
S1
TEXAS INSTRUMENTS 1997
R4
7a
1
2
34
6
7b
7b
7b 7b
910
12
5

Quick Start List for Platform
2-3
Operation
2.2 Quick Start List for Platform
Follow these steps when using the TPA2000D4 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 and Figure 2–2, and details appear in
Chapter 3.
- Platform preparations
1) EnsurethatallexternalpowersourcesaresettoOFFandthattheplatform
power switch S1 is set to OFF.
2) InstallaTPA2000D4moduleinplatformsocketU2,takingcaretoalignthe
module pins correctly.
3) Use switch S2 to select or bypass the signal conditioning EVM (U1).
4) Set control signal polarity jumper JP8 to Lo.
5) Set jumper JP6 to select the Mute control input (causes the TPA2000D4
to shut down if a plug is inserted into platform headphone jack J10).
6) If a headphone amplifier will be installed in U5, set headphone source
switch S3 to U5.
Table 2–3. Platform Jumper and Switch Settings for the TPA2000D4
EVM JP4 JP5 JP6 JP7 JP8 S2 S3
P-N-P Platform X ON Mute X Lo Note 2 U5
Notes: 1) ON = Jumper installed, OFF = Jumper NOT Installed, X = Don’t care
2) SetS2 to ONwhensignal conditioning boardisinstalledin U1; setS2
to OFF when no signal conditioning board is installed.
- Power supply
7) Selectandconnectthepowersupply(ensurepowersupplyissettoOFF):
a) Connectanexternalregulatedpowersupplysetto5VtoplatformVDD
power input connector J6 taking care to observe marked polarity,
or
b) InstallavoltageregulatorEVM(SLVP097orequiv.)inplatformsocket
U6.Connecta7-V–12-VpowersourcetoaplatformVCCpowerinput
J1 or J2 and jumper the appropriate power input (see platform user’s
guide).IfusingJ1,J2,orB1,setS1toONtosupplypowertotheEVM.

Quick Start List for Platform
2-4 Operation
- Inputs and outputs
8) Ensure that the audio signal source level is set to minimum.
9) Connect the audio source to left and right RCA phono jacks J3 and J5 or
stereo miniature phone jack J4.
10) The outputs are to be configured in the following manner:
a) Connect speakers to left and right RCA jacks J7 and J9 or to stripped
wire speaker connectors J8.
or
b) Insert the headphone into the onboard headphone jack (J3).
- Evaluation Module Preparations
11) Use jumpers GAIN0 and GAIN1 to set the gain (see Figure 2–2 and
Table 2–4).
Figure 2–2.Module Preparation
11
Table 2–4. Typical TPA2000D4 EVM Jumper Settings
GAIN1 GAIN0 GAIN (dB)
ON ON 5
ON OFF 11
OFF ON 17
OFF OFF 23
Note: ON = Jumper installed, OFF = Open, X = Don’t care

Quick Start List for Stand-Alone
2-5
Operation
- Power Up
12) Verify correctvoltageand input polarity andsetthe external power supply
toON.IfVCC andanonboardregulatorEVMare usedtoprovideVDD,set
platform power switch S1 to ON.
PlatformLED2shouldlightindicatingthepresenceofVDD,andtheevaluation
modules installed on the platform should begin operation.
13) Adjust the signal source level as needed.
2.3 Quick Start List for Stand-Alone
Follow these steps to use the TPA2000D4 EVM stand-alone or when
connecting it into existing circuits or equipment. Connections to the
TPA2000D4 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 2–3.
Figure 2–3.Quick Start Module Map
4
4
2
5b 6
5a
7
5a
8
- Power supply
1) Ensure that all external power sources are set to OFF.
2) Connectanexternalregulatedpower supplysetto5Vtothemodule VDD
and GND pins taking care to observe marked polarity.

Quick Start List for Stand-Alone
2-6 Operation
- 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 RIN–(LIN–) pins.
5) The outputs are to be configured in the following manner:
a) Connect the speakers to ROUT+ (LOUT+) and ROUT–(LOUT–),
making sure that the polarities are observed.
or
b) Insert the headphone into the onboard headphone jack.
- Evaluation module preparations
6) Use jumpers GAIN0 and GAIN1 to set the gain as shown in Table 2–5.
Table 2–5. TPA2000D4 EVM Gain Settings
GAIN1 GAIN0 GAIN (dB)
ON ON 5
ON OFF 11
OFF ON 17
OFF OFF 23
Note: ON = Jumper installed, OFF = Open, X = Don’t care
- Control inputs
7) SHUTDOWN: A low shuts down the amplifier IC on the module; a high or
float allows normal operation.
- Power up
8) Connectexternalpowersupplysetto5VacrossEVMVDDandGNDpins.
9) Verify correctvoltageand input polarity andsetthe external power supply
to ON.
The EVM should begin operation.
10) Adjust the signal source level as needed.

2-7
Operation
2.4 Reference
2.4.1 TPA2000D4 Audio Power Amplifier EVM Parts List
Table 2–6.TPA2000D4 EVM Parts List
Reference Description Size EVM
Qty. Manufacturer/ Part Number
C1–4Capacitor, ceramic chip, 0.22
µF, +10%, Y5V, 16 V 0603 4 Murata GRM39–Y5V224Z16
C5, C6 Capacitor, ceramic chip, 0.1
µF, +10%, X7R, 16 V 0603 2 Murata GRM39–X7R104K16
C7 Capacitor, ceramic, 220 pF,
+10%, XICON, 50 V 0603 1 Mouser 140–CC504B221K
C8 Capacitor, ceramic, 0.47 µF,
80%/–20%, Y5V, 25 V 0805 1 Murata GRM40–Y5V474Z25
C9 –C13 Capacitor, ceramic, 1 µF,
80%/–20%, Y5V, 16 V 0805 5 Murata GRM40–Y5V105Z16
C14 (Assembled),
C15 (Not assembled) Capacitor, ceramic, 10 µF, ±20%, 16 V 1 Murata GRM235–Y5V106Z016
C16, C17 Capacitor, electrolytic, 220
µF, 80%/–20%, Y5V, 16 V 2Nic Components NACE221M16V6.3X8
R1 –R4 Resistor, chip, 20 kΩ, 1/10 W,
5%, XICON 0603 4 Mouser 301–20K
R5 –R10 Resistor, chip, 120 kΩ, 1/10
W, 5%, XICON 0603 5 Mouser 301–120K
R11, R12 Resistor, chip, 1 kΩ, 1/10 W,
5%, XICON 0603 2 Mouser 301–1K
S1 (SHUTDOWN) Switch, momentary
pushbutton, 12 V, 50 mA 0.291 x 0.138 x 0.134 I
1 Panasonic
EVQ–PJS04K
J1 (GAIN0), J2
(GAIN1) Header, 2 position shunts 2 mm 2 DigiKey 2163S–02–ND
J3 Stereo headphone jack, 2
switches 1 Mouser 161–3504
PNP Pins Headers, 0.1 in centers, 1/2 in
long 0.5 x 0.25 x 0.1
I 19 Samtec T
SW–19–8–G–S

TPA2000D4 Filterless Class-D EVM Schematic
2-8 Operation
2.4.2 TPA2000D4 Filterless Class-D EVM Schematic
The TPA2000D4 filterless class-D EVM schematic is shown in Figure 2–4.
Figure 2–4.TPA2000D4 Class-D EVM Schematic Diagram

TPA2000D4 Filterless Class-D EVM PCB Layers
2-9
Operation
2.4.3 TPA2000D4 Filterless Class-D EVM PCB Layers
The following illustrations depict the TPA2000D4 filterless class-D EVM PCB
assembly and layers. These drawings are not to scale. Gerber plots can be
obtained from any TI Sales Office.
Figure 2–5.TPA2000D4 Filterless Class-D EVM Top Assembly
Note: All open areas are solid copper planes.

TPA2000D4 Filterless Class-D EVM PCB Layers
2-10 Operation
Figure 2–6.TPA2000D4 Filterless Class-D EVM Bottom Assembly
Note: All open areas are solid copper planes.

2-12
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