Texas Instruments TPA2031D1 User manual

User's GuideSLOU212 – May 2008
TPA2031D1 Audio Power Amplifier Evaluation Module
Contents1 Introduction ................................................................................................................... 21.1 Related Documentation From Texas Instruments .............................................................. 21.2 Feature Highlights .................................................................................................. 21.3 Description ........................................................................................................... 31.4 TPA2031D1EVM Specifications .................................................................................. 32 Operation ..................................................................................................................... 42.1 Precautions .......................................................................................................... 42.2 Quick Start List for Platforms ...................................................................................... 62.3 Quick Start List for Stand-Alone Operation ...................................................................... 72.4 References .......................................................................................................... 8
List of Figures
1 Quick Start Platform Map ................................................................................................... 52 TPA2031D1 EVM Connected for Stereo BTL Output ................................................................... 83 TPA2031D1 EVM Schematic Diagram.................................................................................... 94 TPA2031D1 EVM Top Layer ............................................................................................. 105 TPA2031D1 EVM Bottom Layer.......................................................................................... 10
List of Tables
1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA2031D1 EVM .......................... 42 Platform Jumper and Switch Settings for the TPA2031D1 EVM ...................................................... 63 TPA2031D1 EVM Parts List ................................................................................................ 9
NanoFree is a trademark of Texas Instruments.
SLOU212 – May 2008 TPA2031D1 Audio Power Amplifier Evaluation Module 1Submit Documentation Feedback

1 Introduction
1.1 Related Documentation From Texas Instruments
1.2 Feature Highlights
Introduction www.ti.com
This chapter provides an overview of the Texas Instruments (TI) TPA2031D1 NanoFree™ WCSPaudio-amplifier evaluation module (TPA2031D1YZF EVM). It includes a list of EVM features, a briefillustrated description of the module, and a list of EVM specifications.
•TI Plug-N-Play Audio Amplifier Evaluation Platform (literature number SLOU011 ) provides detailedinformation on the evaluation platform and its use with TI audio evaluation modules.•TPA2031D1 2.5-W Mono Filter-Free Class-D Audio Power Amplifier (literature number SLOS417 )This is the data sheet for the TPA2031D1 audio amplifier integrated circuit.
The TI TPA2031D1 audio amplifier evaluation module and the TI Plug-N-Play audio amplifier evaluationplatform include the following features:•TPA2031D1 Low-Voltage Audio Power Amplifier Evaluation Module– 1,45 mm ×1,45 mm NanoFree™ WCSP– Fully-differential filter-free Class-D amplifier– Single channel, bridge-tied load (BTL)– 2.5-V to 5.5-V operation– 2.5-W output power into 4 Ωat 5 V, BTL– Internal depop and quick start-up circuitry– Internal thermal and short-circuit protection– Module gain is set at 2 V/V•Quick and Easy Configuration With the TI Plug-N-Play Audio Amplifier Evaluation Platform– Evaluation module is designed to simply plug into the platform, 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– Onboard 9-V battery– External 5-V to 15-V (V
CC
) supply inputs– External regulated V
DD
supply inputs– Socket for onboard 5-V/3.3-V V
DD
voltage regulator EVM– 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– Left and right RCA phono jack outputs– Left and right compression speaker terminal outputs– Miniature stereo headphone jack output
TPA2031D1 Audio Power Amplifier Evaluation Module2 SLOU212 – May 2008Submit Documentation Feedback

1.3 Description
1.4 TPA2031D1EVM Specifications
www.ti.com Introduction
The TPA2031D1 audio power amplifier evaluation module is a complete, low-power single-channel audiopower amplifier. It consists of the TI TPA2031D1 2.5-W low-voltage Class-D audio power amplifier IC in avery small NanoFree™ WCSP package, along with a small number of other parts mounted on a circuitboard that is approximately 1.25-inches square.
Single in-line header pins are mounted to the underside of the module circuit board. These pins allow theEVM to be plugged into the TI Plug-N-Play audio-amplifier evaluation platform, or to be wired directly intoexisting circuits and equipment when used stand-alone.
The platform, which has room for a pair of TPA2031D1 evaluation modules, is a convenient vehicle fordemonstrating TI's audio power amplifier and related evaluation modules. The EVMs simply plug into theplatform, which automatically provides power to the modules, interconnects them correctly, and connectsthem to a versatile array of standard audio input and output jacks and connectors. Easy-to-useconfiguration controls allow the platform and EVMs to quickly model many possible end-equipmentconfigurations.
There is nothing to build, nothing to solder, and nothing but the speakers included with the platform toconnect.
V
DD
Supply voltage range 2.5 V to 5.5 VPower supply current rating required 1 AP
O
Continuous output power, 4 ΩBTL, V
DD
= 5 V 2.5 WV
I
Audio Input Voltage 0 V to V
DD
, maxZ
L
Minimum load impedance 4 Ω
SLOU212 – May 2008 TPA2031D1 Audio Power Amplifier Evaluation Module 3Submit Documentation Feedback

2 Operation
2.1 Precautions
Operation www.ti.com
Follow the steps in this chapter to prepare the TPA2031D1 audio-amplifier EVM for use. Using theTPA2031D1 EVM with the TI Plug-N-Play audio-amplifier evaluation platform is a quick, easy way toconnect 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 directlyto the module pins, and it can be wired directly into existing circuits or equipment.
The platform switch and jumper settings shown in Table 1 are typical for the TPA2031D1 EVM. In thisconfiguration, inserting a plug into the platform headphone jack (J10) shuts down the TPA2031D1amplifier IC on the EVM.
Table 1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for theTPA2031D1 EVM
EVM JP6 JP7 JP8 S2 S37
TPA2031D1 Mute X
(1)
Lo See
(2)
X
(1)
X = Don't care(2)
Set S2 to On when signal conditioning board is installed in U1; set S2 to Off when no signalconditioning board is installed.
CAUTION
Power Supply Input Polarity and Maximum Voltage
Always ensure that the polarity and voltage of the external power connected toVCC power input connector J1, J2, and/or VDD power input connector J6 arecorrect. Overvoltage or reverse-polarity power applied to these terminals canopen onboard soldered-in fuses and cause other damage to the platform,installed evaluation modules, and/or the power source.
CAUTION
Inserting or Removing EVM Boards
Do not insert or remove EVM boards with power applied—damage to the EVMboard, the platform, or both may result.
TPA2031D1 Audio Power Amplifier Evaluation Module4 SLOU212 – May 2008Submit Documentation Feedback

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
On
Off
Conditioning
S2
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-Play Audio 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
6a
1
3
6b
6b
6b 6b
89
10
9
2
4
5
www.ti.com Operation
Figure 1. Quick Start Platform Map
SLOU212 – May 2008 TPA2031D1 Audio Power Amplifier Evaluation Module 5Submit Documentation Feedback

2.2 Quick Start List for PlatformsOperation
www.ti.com
Follow these steps when using the TPA2031D1 EVM with the TI Plug-N-Play audio-amplifier evaluationplatform (see the platform user's guide (SLOU011 ) for additional details).•Platform preparations
1) Ensure that all external power sources are set to OFF and that the platform power switch S1 isset to Off2) Install a TPA2031D1 module in platform sockets U3 and U4 for stereo operation (or a module ineither U3 or U4 for single channel operation), 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. Jumper, J1, on the TPA2031D1 EVM must beopen to allow the TPA2031D1 to shut down if a plug is inserted into platform headphone jackJ10.
Table 2. Platform Jumper and Switch Settings for the TPA2031D1 EVM
EVM JP6 JP7 JP8 S2 S37
TPA2031D1 Mute X
(1)
Lo See
(2)
X
(1)
X = Don't care(2)
Set S2 to On when signal conditioning board is installed in U1; set S2 to Off when no signalconditioning board is installed.•Power supply
6) Select and connect the power supply:a) Connect an external regulated power supply set to a voltage between 2.5 V and 5.5 V toplatform V
DD
power input connector J6, taking care to observe marked polarityORb) Install a voltage regulator EVM (SLVP097 or equivalent.) in platform socket U6. Install a 9-Vbattery in B1 or connect a7 V-12 V power source to a platform V
CC
power input J1 or J2 and jumper the appropriatepower input (see platform user's guide).
•Inputs and Outputs
7) Ensure that signal source level is set to minimum.8) Connect the audio source to left (J5) or right (J3) RCA phono jacks, or both if using twoTPA2031D1 modules, or to stereo miniature phone jack (J4).9) Connect 4- Ωto 32- Ωspeakers to left (J9) or right (J7) RCA jacks, or both if using twoTPA2031D1 modules, or to stripped wire connector (J8).
•Power Up
10) Verify correct voltage and input polarity and set the external power supply to ON. If V
CC
and anon-board regulator EVM are used to provide V
DD
, set platform power switch S1 to On.Platform LED2 lights, indicating the presence of V
DD
, and the evaluation modules installed on theplatform begin operation.11) Adjust the signal source level as needed.
TPA2031D1 Audio Power Amplifier Evaluation Module6 SLOU212 – May 2008Submit Documentation Feedback

2.3 Quick Start List for Stand-Alone Operation
www.ti.com Operation
Follow these steps to use the TPA2031D1 EVM stand-alone or when connecting it into existing circuits orequipment. Connections to the TPA2031D1 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.•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 V
DD
and GND pins, takingcare to observe marked polarity.
•Inputs and outputs
3) Ensure that the signal source level is set to minimum.4) Connect the positive lead from the audio source to the module IN+ pin and the negative lead tothe IN– pin.5) SHUTDOWN can be enabled by either depressing switch S1, or by driving the SHUTDOWN EVMpin with TTL level logic.6) Connect a 4- Ωto 32- Ωspeaker to the module OUT+ and OUT–. pins.
•Power Up
7) Verify correct voltage and input polarity and set the external power supply to ON.The EVM begins operation.8) Adjust the signal-source level as needed.
SLOU212 – May 2008 TPA2031D1 Audio Power Amplifier Evaluation Module 7Submit Documentation Feedback

2.4 References
2.4.1 TPA2031D1 EVM Connected for Stereo BTL Output
5 VDC
Right
Audio
Input
(Right)
Audio
Input
(Left)
External Mute Control
5 VDC
Left
Operation www.ti.com
NOTE: Due to the very small size of the NanoFree™ WCSP IC package, the standard part number TPA2031D1 isreplaced with the code AKO (Pb-free version).
Figure 2. TPA2031D1 EVM Connected for Stereo BTL Output
TPA2031D1 Audio Power Amplifier Evaluation Module8 SLOU212 – May 2008Submit Documentation Feedback

2.4.2 TPA2031D1 EVM Schematic Diagram
IN+
C2
0.22 mFR2
150 kW(1)
0.22 mF
C1
150 kW(1)
R1
SHUTDOWN
S1
100 kW
R3
IN+
VDD
IN−
SHUTDOWN
GND
VO−
VO+
PVDD
C4
10 mF
C3
0.22 mF
GND
A2, A3
A3
C3
B2
A1
B1
C1
C2
OUT−
OUT+
GND
IN−
VDD
2.5 V to 5.5 V
2.4.3 TPA2031D1 Audio Power Amplifier Evaluation Module Parts List
www.ti.com Operation
(1) Values shown are for EVM revision A only. For non-rev A EVMs, R1 = R2 = 60.4 k Ω, A
V
= 5 V/V.
Figure 3. TPA2031D1 EVM Schematic Diagram
Table 3. TPA2031D1 EVM Parts List
Manufacturer/ Digi-Key
(3)Qty Reference Description SMD
(1)
Size
(2)
Part Number Number
Panasonic Digi-Key3 C1, C2, C3 Capacitor, 0.22 µF, 80%/–20%, nonpolarized 0603
ECJ-1VF1C224Z PCC1790TR-NDPanasonic Digi-Key1 C4 Capacitor, 10 µF, 6.3 V A
ECS-TOJY106R PCS1106CT-NDPanasonic Digi-Key2 R1, R2
(4)
Resistor, 150 k Ω, 1/16 W, 1% 0603
ERJ-3EKF6042V P60.4KHTR-NDPanasonic Digi-Key(2)1 R3 Resistor, 100 k Ω, 1/16 W, 10% 0603
ERJ-3EKF1003V P100KHTR-NDPanasonic Digi-Key1 S1 Momentary switch
P8048SCT-ND P8048SCT-NDSullins
PTC36SABN
Digi-Key7 Terminal post headers OR
S1022-36-NDSAMTEC
TSW-19-8-G-S1,45 mm ×1,45 mm TI1 U1 IC, TPA2031D1, Mono Class-D audio amplifier
WCSP package TPA2031D1YZF1 PCB1 Printed-circuit board, TPA2031D1 EVM(1)
All items are SMD except terminal posts. All components are Pb free.(2)
Due to the very small size of the NanoFree™ WCSP IC package, the standard part number TPA2031D1 is replaced with the code AKO(Pb-free version).(3)
Call Digi-Key for Pb-free information.(4)
Values shown are for EVM revision A only. For non-rev A EVMs, R1 = R2 = 60.4 k Ω, AV = 5 V/V.
The is TPA2031D1 EVM is completely Pb-free. The device, all the components, and the printed-circuitboard are all Pb-free. In addition, no lead is used in the manufacture or assembly of the module.
SLOU212 – May 2008 TPA2031D1 Audio Power Amplifier Evaluation Module 9Submit Documentation Feedback

2.4.4 TPA2031D1 EVM PCB Layers
Operation www.ti.com
The following illustrations depict the TPA2031D1 EVM PCB layers and silkscreen. These drawings are notto scale. Gerber plots can be obtained from any TI sales office.
Figure 4. TPA2031D1 EVM Top Layer
Figure 5. TPA2031D1 EVM Bottom Layer
10 TPA2031D1 Audio Power Amplifier Evaluation Module SLOU212 – May 2008Submit Documentation Feedback