TPA2000D4
Filterless ClassĆD With
Stereo Headphone
Audio Power Amplifier EVM
User’s Guide
2001 Mixed-Signal Products
SLOU091A
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
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
Read This First
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 A2000D4 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. . . . . . . . . . . . . . . . . . . . . . . .
Chapter Title—Attribute Reference
v
Running Title—Attribute Reference
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vi
Chapter 1
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 TP A2000D4 EVM Specifications 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction
1-1
Feature Highlights
1.1 Feature Highlights
The TI TP A2000D4 audio amplifier evaluation module and the TI plug-n-play
audio amplifier evaluation platform include the following features:
-
TP A2000D4 Stereo 2-W Filterless Class-D With Stereo Headphone Audio
Power Amplifier Evaluation Module
J
J
J
J
J
J
J
J
J
Class-D without output filter
Stereo headphone output jack
Internal depop circuitry to minimize transients in outputs
High efficiency
Low distortion
Low supply current (9 mA for class-D, 7 mA for stereo headphone)
2 W per channel output power into 4 Ω at 5 V
Low current consumption in shutdown mode
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
Platform provides quick and easy audio input and output connections
-
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
J
J
J
1-2
Miniature stereo phone jack input
Left and right RCA phono jack outputs
Left and right compression speaker terminal outputs
Miniature stereo headphone jack output
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
mounted on a circuit board that measures approximately 2-1/4 inches by 1-1/2
inches (see Figure 1–1).
Figure 1–1.The TI TPA2000D4 Audio Amplifier EVM—Top View
Description
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 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,
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.
Introduction
1-3
TP A2000D4 EVM Specifications
1.3 TPA2000D4 EVM Specifications
Supply voltage range, V
Supply current, I
DD
Continuous output power per channel, BTL, P
DD
: 4 Ω, V
O
Continuous output power per channel, headphones, P
Minimum load impedance, BTL, R
Minimum load impedance, headphone, R
L
L
= 5 V 2 W. . . . . . . . . . . . . . . . . . . . . .
DD
: 32 Ω, V
O
= 5 V 85 mW. . . . . . . . . .
DD
4.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 A max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4
Introduction
Chapter 2
Operation
The steps in this chapter can be followed to quickly prepare the TP A2000D4
filterless class-D audio amplifier EVM for use. Using the TP A2000D4 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 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
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) Set S2 to ON when signal conditioning board is installed in U1; set S2
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation
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
7b
Power
Input
Audio
Input
7b
SUPPLY
7b
POWER
U6
F2
VR2
7a
Off Pwr
1
12
On
ICC
JP4
S1
7b
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
9
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
10
Speaker
Headphone
Output
J10
R5
Output
5
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
C3 C2
HP Out
Left
J9
Left
Stereo
2-2
3
2
6
4
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) 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 A2000D4 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 control signal polarity jumper JP8 to Lo.
5) Set jumper JP6 to select the Mute control input (causes the TP A2000D4
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.
Quick Start List for Platform
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) Set S2 to ON when signal conditioning board is installed in U1; set S2
to OFF when no signal conditioning board is installed.
-
Power supply
7) Select and connect the power supply (ensure power supply is set to OFF):
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 VCC power input
J1 or J2 and jumper the appropriate power input (see platform user’s
guide). If using J1, J2, or B1, set S1 to ON to supply power to the EVM.
DD
Operation
2-3
Quick Start List for Platform
-
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
Table 2–4. Typical TPA2000D4 EVM Jumper Settings
2-4
11
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
Operation
-
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 VDD, and the evaluation
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
Quick Start List for Stand-Alone
2
8
5a
4
7
4
5a
-
Power supply
5b
6
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.
Operation
2-5
Quick Start List for Stand-Alone
-
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
-
Power up
-
Control inputs
7) SHUTDOWN
: A low shuts down the amplifier IC on the module; a high or
float allows normal operation.
8) Connect external power supply set to 5 V across EVM VDD and GND pins.
9) Verify correct voltage and input polarity and set the external power supply
to ON.
The EVM should begin operation.
10) Adjust the signal source level as needed.
2-6
Operation
2.4 Reference
2.4.1 TPA2000D4 Audio Power Amplifier EVM Parts List
Table 2–6.TPA2000D4 EVM Parts List
Reference Description Size
C1–4 Capacitor, ceramic chip, 0.22
µF, +10%, Y5V, 16 V
C5, C6 Capacitor, ceramic chip, 0.1
µF, +10%, X7R, 16 V
C7 Capacitor, ceramic, 220 pF,
+10%, XICON, 50 V
C8 Capacitor, ceramic, 0.47 µF,
80%/–20%, Y5V, 25 V
C9 – C13 Capacitor , ceramic, 1 µF,
80%/–20%, Y5V, 16 V
C14 (Assembled),
C15 (Not assembled)
C16, C17 Capacitor, electrolytic, 220
R1 – R4 Resistor, chip, 20 kΩ, 1/10 W,
R5 – R10 Resistor, chip, 120 kΩ, 1/10
Capacitor, ceramic, 10 µF,
±20%, 16 V
µF, 80%/–20%, Y5V, 16 V
5%, XICON
W, 5%, XICON
EVM
Qty.
0603 4 Murata
0603 2 Murata
0603 1 Mouser
0805 1 Murata
0805 5 Murata
1 Murata
2 Nic Components
0603 4 Mouser
0603 5 Mouser
Manufacturer/
Part Number
GRM39–Y5V224Z16
GRM39–X7R104K16
140–CC504B221K
GRM40–Y5V474Z25
GRM40–Y5V105Z16
GRM235–Y5V106Z016
NACE221M16V6.3X8
301–20K
301–120K
R1 1, R12 Resistor, chip, 1 kΩ, 1/10 W,
5%, XICON
S1 (SHUTDOWN) Switch, momentary
pushbutton, 12 V, 50 mA
J1 (GAIN0), J2
(GAIN1)
J3 Stereo headphone jack, 2
PNP Pins Headers, 0.1 in centers, 1/2 in
Header, 2 position shunts 2 mm 2 DigiKey
switches
long
0603 2 Mouser
0.291 x 0.138 x
0.134
I
0.5 x 0.25 x 0.1
I
301–1K
1 Panasonic
EVQ–PJS04K
2163S–02–ND
1 Mouser
161–3504
19 Samtec T
SW–19–8–G–S
Operation
2-7
TPA2000D4 Filterless Class-D EVM Schematic
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
2-8
Operation
TPA2000D4 Filterless Class-D EVM PCB Layers
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.
Operation
2-9
TPA2000D4 Filterless Class-D EVM PCB Layers
Figure 2–6.TPA2000D4 Filterless Class-D EVM Bottom Assembly
Note: All open areas are solid copper planes.
2-10
Operation
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2-12
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