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Texas Instruments TPA2051D3EVM - User guides
User's Guide
SLOU254 – June 2009
TPA2051D3EVM
1
2
3
4
5
Contents
Introduction ................................................................................................................... 1
Operation ..................................................................................................................... 2
TPA2051D3EVM Schematic ............................................................................................... 9
TPA2051D3EVM PCB Layers ............................................................................................ 11
TPA2051D3EVM Parts List ............................................................................................... 13
List of Figures
1
2
3
4
5
6
7
8
9
10
11
12
Stereo Differential Mode Input Configuration ............................................................................ 3
Non-Differential Mode Input Configuration ............................................................................... 3
Place Shunts Horizontally Across SCL and SDA ........................................................................ 4
Starting the TPA2051D3 Interface ......................................................................................... 5
TPA2051D3EVM Graphical User Interface............................................................................... 6
Connect I2C Controls to JP3 ............................................................................................... 8
TPA2051D3EVM Schematic ............................................................................................... 9
TPA2051D3EVM Schematic .............................................................................................. 10
TPA2051D3EVM – Top Layer ............................................................................................ 11
TPA2051D3EVM – Layer 2 .............................................................................................. 11
TPA2051D3EVM – Layer 3 ............................................................................................... 12
TPA2051D3EVM – Bottom Layer ........................................................................................ 12
List of Tables
1
2
Jumpers Default Setting .................................................................................................... 2
TPA2051D3EVM Parts List ............................................................................................... 13
1
Introduction
1.1
Description
The TPA2051D3 is a mono Class-D power amplifier along with a stereo DirectPath™ headphone amplifier
and bypass switch. TPA2051D3 has SmartGain™ technology to prevent output clipping. The input
channels have 32-step volume control and the DirectPath headphone amplifier has a 9-step level gain
control. The volume is controlled through an I2C™ interface. All amplifiers have output short-circuit and
thermal-overload protection.
The TPA2051D3EVM ( evaluation module) is a complete, stand-alone audio board. It contains the
TPA2051D3 WCSP(YFP) Class-D audio subsystem.
All components and the EVM are lead free.
DirectPath, SmartGain are trademarks of Texas Instruments.
Windows is a trademark of Microsoft Corporation.
I2C is a trademark of Philips Electronics.
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Operation
1.2
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TPA2051D3EVM Specifications
PARAMETER
UNITS
V
1.5 Maximum
A
1.25
W
25
mW
Minimum load impedance (Speaker)
4
Ω
Minimum load impedance (Headphone)
16
Ω
Supply voltage range
IDD
Supply current
PO
RL
2
VALUE
–0.3 to 6
VDD
Speaker Continuous output power per channel,
8 Ω, VDD = 5 V, THD + N = 1%
Headphone Continuous output power per channel,
16 Ω, VDD = 5 V, THD + N = 1%
Operation
The TPA2051D3EVM can be evaluated in a stand-alone mode or when connected to existing circuits with
I2C controls.
2.1
Quick Start for Stand-Alone Operation
A desktop or laptop computer running the Windows™ XP operating system is required for the stand-alone
operation. Connect the EVM to a computer using a USB cable. A jumper (USBPWR) provides the option
for the TPA2051D3 to receive power from the USB or an external supply using banana plugs. The inputs
accept standard RCA plugs. The speaker output connection accepts banana plugs. The headphone output
connection accepts standard 3.5 mm headphone plugs.
2.1.1
1.
2.
3.
4.
Software Installation Sequence
Insert the TPA2051D3EVM Software Installation CD provided.
Unzip the files to a temporary folder onto a PC.
Install TPA2051D3 software by double-clicking the filename setup.exe located in TPA2051D3 Setup
folder.
Accept license agreement and defaults; then complete the installation.
Note:
2.1.2
Uninstall the TPA2051D3 software at a later time using the Add/Remove Programs found
under the Windows Control Panel. It is unnecessary to repeat the preceding steps, once the
software is installed.
Evaluation Module Setup
1. Configure the jumpers using Table 1 for the default settings:
Table 1. Jumpers Default Setting
2
TPA2051D3EVM
Jumper
Default Setting
DVDD, JP10
Shunt
J1, J2
Shunt across each other
JP6, JP7, JP8, JP9
As shown in Figure 2
USBPWR, JP1, JP2, JP3,
JP4 , JP5
Remove
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Operation
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2. Configure the input according to the desired TPA2051D3 operation mode:
a. Differential Modes
Install shunts and connect RCA plugs as shown in Figure 1.
L
R
Mono Channel
Plugs Here
Bypass Channel
Plugs Here
Right Channel
Plugs Here
Left Channel
Plugs Here
Figure 1. Stereo Differential Mode Input Configuration
b. For single-ended modes, install shunts and connect RCA plugs as shown in Figure 2.
R
L
Mono Channel
Plugs Here
Bypass Channel
Plugs Here
Stereo 2
Plugs Here
R
L
Stereo 1
Plugs Here
Figure 2. Non-Differential Mode Input Configuration
3. Shunt JP3 to connect BYPASS+ input to MONO+. Shunt JP4 to connect BYPASS- input to MON0input.
4. Remove shunts of JP1 and JP2 to allow R1 and R2 in series with bypass switch. Shunt JP1 and JP2
to short R1 and R2.
5. Install shunts in J1 and J2 as shown in Figure 3. This sets the TPA2051D3 to accept I2C inputs from
the EVM itself.
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Operation
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Figure 3. Place Shunts Horizontally Across SCL and SDA
6. Ensure all external power sources are set to OFF.
7. Connect an external regulated power supply adjusted from 2.5 V to 5.5 V to the VDD and GND banana
jacks, taking care to observe the marked polarity.
8. Install shunt in jumper DVDD if DVDD is powered by the 1.8 V regulated supply from the EVM itself. If
DVDD is powered by another supply(between 1.8 V and 3.3 V), remove shunt in jumper DVDD and
connect the supply at pin 2 of the jumper.
9. Connect audio source as mentioned in step two.
10. Connect headphones.
11. Connect speakers (8 Ω to 32 Ω) to the output banana jacks OUTP and OUTM.
12. Turn on power sources.
13. Plug in the USB.
14. Press button S2 and release to reset TPA2051D3.
15. The TPA2051D3 can also be powered by USB cable if the audio amplifier output power is less than
100mW. Shunt USBPWR and remove the power supply at VDD and GND for USB power option.
4
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Operation
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2.1.3
Using the Software
1. Start the TPA2051D3 Interface by clicking the Start menu and clicking the All Programs → Texas
Instruments Inc → TPA2051D3 Interface cascading menus shown in Figure 4.
Figure 4. Starting the TPA2051D3 Interface
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Operation
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2. The TPA2051D3 software graphical user interface displays as shown in Figure 5.
Figure 5. TPA2051D3EVM Graphical User Interface
Note:
The TPA2051D3 powers up with the amplifiers disabled. To hear an output, enable and
remove the disable for each channel, increase the gain to a higher value.
3. Follow these steps only if using a PC is both the music source and the computer on which the
TPA2051D3 GUI is run.
When using WinXP, if after initially installing the software, the PC does not play music out of the
headphone jack:
a. Display the Control Panel.
b. Select the Sounds, Speech, and Audio Device item under the Control Panel.
c. Click Sounds and Audio Device Properties link.
d. Select the Audio tab.
e. Verify that the Default device under Sound playback is the audio driver of the PC HW, not the
USBMODEVM TPA2051D3 GUI driver.
f. Change the driver in the menu to the PC Audio HW driver.
g. Click OK.
4. Click the HW Reset button to reset the device.
5. Turn off Software Shutdown.
6. Toggle Class-D Enable/Disable to enable/disable speaker output.
7. Toggle Headphone Enable/Disable to enable/disable headphone output.
8. Select input mode in Mode.
6
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Operation
9. Adjust the volume for input amplifiers by sliding the bar in Stereo 1 Volume, Stereo 2 Volume or Mono
Volume.
10. Select the Class-D gain at Speaker Gain.
11. Adjust the headphone gain by sliding the bar in Headphone Gain.
12. Total System Gain shows the total gain of speaker output and headphone output.
13. Toggle Limiter Enable/Disable to enable/disable limiter.
14. Select the Class-D limiter level by clicking Class-D Limiter and select the levels at Class-D limiter.
15. The Class-D limiter power level is calculated at Class-D Limiter. Change Load Resistance value to
calculate different limiter power.
16. Select the headphone limiter level by clicking Headphone Limiter and select the levels at HP limiter.
17. The headphone limiter power level is calculated at Headphone Limiter. Change Load Resistance value
to calculate different limiter power.
18. Change the attack time and release time at Limiter Response.
19. I2C Status box reports the status of I2C communications. An error or failure has occurred if it turns
red.
20. Thermal box reports the status of thermal failure. A thermal fault has occurred if it turns red.
21. PA Fault reports the status of Class-D amplifier. A short-circuit fault has occurred if it turns red.
2.1.4
Using the I2C Programming Function
The GUI has a built-in I2C programming interface. It has a log feature to record the configuration
selections made in the GUI.
To use the I2C programming function:
1. At the top left corner of the GUI, click File to access the I2C programming interface.
2. To save the current register values in a script.
a. Select Save Script button.
b. Click the folder icon to navigate to the folder where the script is to be stored.
c. Provide a name for the file and save as text (txt) format.
d. Select OK to save.
3. To load the previously saved script to program the entire register file.
a. Select Load Script button.
b. Click the folder icon to navigate to the folder where the script text file is located.
c. Select the desired filename.
d. Click OK.
e. Click Load button.
4. I2C interface can program individual register values of TPA2051D3. Select I2C Interface >> I2C
address is xE0, which is the address of TPA2051D3. Device address is from 1 to 6, which is the
register address of TPA2051D3.
5. To record all the changes made in the GUI and store the changes in a text file.
a. Select Record Script button.
b. Click the folder icon to navigate to the folder where the GUI changes are recorded.
c. Provide a name for the file and save as text (txt) format.
d. Click Record Off that toggles to Record On. The green light turns red to indicate active recording of
the GUI changes.
e. Click Exit button.
f. Make changes in the TPA2051D3 software GUI.
g. Select Record Script button.
h. Click Record On that toggles to Record Off. The red light turns green to indicate the GUI changes
are no longer recording.
i. Click Exit button. All the changes are recorded in the selected text file that was named in the third
step.
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2.2
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2
Quick Start List When Connected to External I C Controller
The TPA2051D3EVM can be connected to existing circuits with I2C controls. Connections to the EVM
module can be made using banana plugs for the power supply. The inputs accept standard RCA plugs.
The output connection accepts standard 3.5-mm headphone plugs.
2.2.1
Evaluation Module Setup
1. Install shunts in jumpers JP10. Remove shunts in J1 and JP2 and connect I2C controls to JP3 as
shown in Figure 6.
2. The two options to power DVDD:
• Connect USB cable to supply 1.8V for DVDD.
• Disconnect USB cable. Remove shunt for jumper DVDD and connect an external power supply
(from 1.75 V to 1.95 V) at pin 2 of jumper DVDD.
Figure 6. Connect I2C Controls to JP3
3. For all the other connections, follow the steps in Evaluation Module Setup.
8
TPA2051D3EVM
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FROM
TAS1020
P1.0
FROM
CONTROLLER
J2
RCA (Black)
INR2
RCA (Black)
INL2
RCA (Black)
INR1
RCA (Black)
INL1
RCA (Black)
MONO
RCA (Black)
J1
SCL
Q1
D
1
S2
2
C11
C2
E1
D2
E2
D3
C1
D1
4
3
2
1
GND
GND
White
SDA
JP9
White
G
S
GND
BSS138ZXCT
SOT23-DBV3
GND
GND
DNP
0603
E
A
GND
GND
INR1
VREF
INL2
INR2
SCL
INL1
SDA
BYP-
PGND
MONO-
BYP+
PVDD
MONO+
AVDD
OUT+
1
GND
E4
AGND
HPVDD
EN
DVDD
OUT-
5
HPR
HPVSS
HPL
CPP
CPN
A3
2.2ufd/10V
0603
C14
GND
D5
WCSP25-YFF
TPA2051D3YFF
TOP VIEW
1.0ufd/16V
0603
C10
E3
C4
1
A2
D4
A5
B5
E5
C5
A4
U1
B4
B3
B1
DNP
PWR
GND
A1
GND
1.0ufd/16V
0603
C8
Vdd
GND
1.0ufd/16V
0603
C9
Vdd
B2
3
0.47ufd/10V
0402
C6
0.47ufd/10V
0402
C5
100K
0603
R3
C3
JP8
2
JP7
1.0ufd/10V
0402
C2
1.0ufd/10V
0402
C1
1.0ufd/16V
0603
C7
DVDD
+1.8VD
2
GND
1
3
2
GND
1
0.47ufd/10V
0402
C4
IN
DNP
JP6/9
1
1
C3
JP2
10
0603
R2
0.47ufd/10V
0402
1-2 = DIFF
2-3 = SE
JP6
2
JP4
10
0603
3
3
3
JP5
JP3
JP1
R1
2
GND
1
3
2
GND
1
3
2
1
3
2
GND
2.2ufd/10V
0603
C13
R7
0.0
0805
0.0
0805
R6
C12
GND
1000pfd/50V
0603
C16
GND
1000pfd/50V
0603
C15
1.0ufd/16V
0603
100ohms/4A
0805
FB1
100ohms/4A
0805
FB1
GND
10ufd/16V
1206
C33
GND
1206
DNP
R9
GND
1206
DNP
R8
OUT-
USB+
USBPWR
GND
VDD
White
HPR
White
HPL
DNP
OUT
OUT+
Vdd
1.0K
0805
GND
GND
GND
5 NC 4
GND
Black
GND
GND
Black
GND
Black
GND
HEADPHONE
Right
Left
OUTM
GND
Black
GND
1
2
3
GND
4700pfd/50V
0603
C18
White
OUTP
White
4700pfd/50V
0603
C17
R5 GND
1.0K
0805
R4
MEASUREMENT FILTER
3
Shield
BYPASS
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TPA2051D3EVM Schematic
TPA2051D3EVM Schematic
Figure 7. TPA2051D3EVM Schematic
TPA2051D3EVM
9
10
TPA2051D3EVM
FB3
NC
NC
Case
Case
Case
Case
USB MINIB
GND
2
1
600 Ohms/2A
0805
11
10
9
8
7
6
J3
GND
5v
Data-
Data+
ID_NC
J1
1
SDA 2
SCL 3
4
5
4
1
2
3
2mm
J2
FB4
2
1
600 Ohms/2A
0805
2
1
0.0
0805
R17
GND
USB+
27.4
0603
R15
27.4
0603
R14
1.50K
0603
R13
GND
1
+1.8VD
5
4
GND
0.1ufd/16V
0603
10ufd/6.3V
1206
GND
C24
4
3
2
1
C23
GND
6
3
TPS77518D
1.8V,500mA
8
7
1
7
TPS77533D
3.3V/500mA
SOT23-DBV5
GND
VR2
1.0ufd/10V
0603
C22
+1.8VD
5
6
7
8
6
5
2
3
4
8
47pfd/50v
0603
100ufd/10V
TANT2412
GND
+
C25
+3.3VD
+3.3VD
1
100K
0603
24LC64-I/SN
SOP8-D(SOIC)
5
4
R12
C20
8
7
6
U3
U2
3
GND
2
GND
2
VR1
GND
1
2
+3.3VD
GND
JP10
47pfd/50v
0603
C19
DNP
0603
R11
DNP
0603
R10
S1
2
GND
0.1ufd/16V
0603
C26
+3.3VD
GND
1
GND
0.1ufd/16V
0603
C27
100K
0603
R18
+3.3VD
C30
+3.3VD
100pfd/50V
0603
GND
R19
3.09K
0603
1
47
45
44
U4
43
42
41
18
19
20
21 22
39
23
38
24
37
36
35
27
28
29
30
31
32
33
34
R20
2.00K
0603
+3.3VD
0.5in
0.5in
0.5in
GND GND GND GND
0.5in
STANDOFF HARDWARE
GND
0.1ufd/16V
0603
C32
GND
P1.0
25
16 17
40
12
15
TAS1020BPFB
46
GND
33pfd/50V
0603
C29
26
13
1000pfd/50V
48
0603
14
2
11
10
9
8
7
6
5
4
3
2
Y1
6.00MHz
HC49/US
1
GND
C31
33pfd/50V
0603
C28
TO
TPA2051
EN
GND
+3.3VD
TPA2051D3EVM Schematic
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Figure 8. TPA2051D3EVM Schematic
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TPA2051D3EVM PCB Layers
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4
TPA2051D3EVM PCB Layers
Figure 9. TPA2051D3EVM – Top Layer
Figure 10. TPA2051D3EVM – Layer 2
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TPA2051D3EVM PCB Layers
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Figure 11. TPA2051D3EVM – Layer 3
Figure 12. TPA2051D3EVM – Bottom Layer
12
TPA2051D3EVM
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TPA2051D3EVM Parts List
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5
TPA2051D3EVM Parts List
Table 2. TPA2051D3EVM Parts List
QTY
Ref Des
Description
Vendor
Vendor Part No.
MANU
MANU Part No.
TI-SEMICONDUCTORS
1
U1
AUDIO SUBSYSTEM,MONO CLASS-D DIRECTPATH
AMPS WCSP25-YFF ROHS
Texas Instruments
TPA2051D3YFF
Texas Instruments
TPA2051D3YFF
1
U2
2-BIT BIDIR LEVEL TRANSLATOR VSSOP8-DCU
ROHS
Digi-Key
296-21931-1
Texas Instruments
TXS0102DCUR
1
U4
USB STREAMING CONTROLLER TQFP48-PFB
ROHS
Digi-Key
296-13041-5
Texas Instruments
TAS1020BPFB
1
VR1
VOLT REG 1.8V 500mA LDO FAST TRANSIENT
RESPONSE SOP8-D ROHS
Digi-Key
296-2774-5
Texas Instruments
TPS77518D
1
VR2
VOLT REG 3.3V 500mA LDO FAST TRANSIENT
RESPONSE SOP8-D ROHS
Digi-Key
296-2776-5
Texas Instruments
TPS77533D
1
U3
64K I2C SERIAL EEPROM SOP8-D
Digi-Key
24LC64-I/SN
Microchip
24LC64-I/SN
1
Q1
N-CH ENHANCEMENT MODE VERT DMOS FET
SOT23-DBV3 ROHS
Digi-Key
BSS138ZXCT
Zetex
BSS138TA
1
Y1
CRYSTAL, 6.000MHz, SMT-HC49/US CSM-7 ROHS
Digi-Key
XC1295CT
ECS
ECS-60-32-5PXDN-TR
SEMICONDUCTORS
2
C28, C29
CAP SMD0603 33pF 50V 5% CERM NPO ROHS
Digi-Key
PCC330ACVCT
Panasonic
ECJ-1VC1H330J
2
C19, C20
CAP SMD0603 47pF 50V 5% CERM NPO ROHS
Digi-Key
PCC470ACVCT
Panasonic
ECJ-1VC1H470J
1
C30
CAP SMD0603 100pF 50V 5% CERM NPO ROHS
Digi-Key
PCC101ACVCT
Panasonic
ECJ-1VC1H101J
4
C24, C26, C27, C32
CAP SMT0603 0.1µF 16V 10% CERM X7R ROHS
Digi-Key
PCC1762CT
Panasonic
ECJ-1VB1C104K
6
C1–C6
CAP SMD0402 1.0µF 10V 20% CERM X5R ROHS
Digi-Key
PCC2364CT
Panasonic
ECJ-0EB1A105M
1
C22
CAP SMD0603 1.0µF 10V 10% CERM X5R ROHS
Digi-Key
PCC2174CT
Panasonic
ECJ-1VB1A105K
5
C7–C10, C12
CAP SMD0603 1.0µF 16V 10% CERM X5R ROHS
Digi-Key
399-5090-1
Kemet
C0603C105K4PACTU
2
C13, C14
CAP SMD0603 2.2µF 10V 10% CERM X7R ROHS
Digi-Key
490-4520-1
Murata
GRM188R71A225KE15D
1
C31
CAP SMD0603 1000pF 50V 10% CERM X7R ROHS
Digi-Key
PCC1772CT
Panasonic
ECJ-1VB1H102K
2
C17, C18
CAP SMD0603 4700pF 50V CERM X7R ROHS
Digi-Key
PCC1780CT
Panasonic
ECJ-1VB1H472K
1
C33
CAP SMD1206 10µF 16V 10% CERM X5R ROHS
Digi-Key
399-5091-1
Kemet
C1206C106K4PACTU
1
C23
CAP SMD1206 10µF 6.3V 10% CERM X5R ROHS
Digi-Key
445-1388-1
TDK
C3216X5R0J106K
1
C25
CAP TANT2412 10µFD10V 10% B45197A ROHS
Digi-Key
495-1528-1
Kemet
B45197A2107K309
RESISTORS
3
R6, R7, R17
RESISTOR SMD0805 0 Ω 1/8W 5% ROHS
Digi-Key
P0.0ACT
Panasonic
ERJ-6GEY0R00V
2
R1, R2
RESISTOR SMD0603 10 Ω 1/10W 5% ROHS
Digi-Key
311-10GRCT
Yageo
RC0603JR-0710RL
2
R14, R15
RESISTOR SMD0603 27.4 Ω 1/10W 1% ROHS
Digi-Key
541-27.4HCT
Vishay
CRCW060327R4FKEA
0
R4, R5
RESISTOR SMD0805 1.0K 5% 1/8W ROHS
Digi-Key
P1.0KACT
Panasonic
ERJ-6GEYJ102V
1
R13
RESISTOR SMD0603 1.50 kΩ 1/10W 1% ROHS
Digi-Key
P1.50KHCT
Panasonic
ERJ-3EKF1501V
1
R20
RESISTOR SMD0603 2.00 kΩ 1/16W 1% ROHS
Digi-Key
P2.00KHCT
Panasonic
ERJ-3EKF2001V
1
R19
RESISTOR SMD0603 3.09 kΩ 1/10W 1% ROHS
Digi-Key
P3.09KHCT
Panasonic
ERJ-3EKF3091V
3
R3, R12, R18
RESISTOR SMD0603 100 kΩ 1/10W 5% ROHS
Digi-Key
P100KGCT
Panasonic
ERJ-3GEYJ104V
FERRITE BEADS
2
FB3, FB4
FERRITE SMD0805 600 Ω 0.24 A RDC=0.14 ROHS
Digi-Key
445-1554-1
TDK
MMZ2012R601A
2
FB1, FB2
FERRITE BEAD SMD0805 80 Ω at 100MHz 5A ROHS
Digi-Key
240-2395-1
Steward
HI0805R800R-10
HEADERS AND JACKS
11
J2, JP1–JP5,JP7,
JP9, DVDD, JP10,
USBPWR
HEADER 2 PIN, PCB 2,0 mm ROHS
Digi-Key
2663S-02
Norcomp
26630201RP2
2
JP6, JP8
HEADER 3 PIN, PCB 2,0 mm ROHS
Digi-Key
2663S-03
Norcomp
26630301RP2
1
J1
HEADER 4 PIN, PCB 2,0 mm ROHS
Digi-Key
2663S-04
Norcomp
26630401RP2
1
J3
JACK USB MINIB SMT-RA 5 PIN ROHS
Digi-Key
H2959CT
Hirose
UX60-MB-5ST
6
INL1 ,INL2,INR1,
INR2,MONO,
BYPASS
JACK, RCA 3-PIN PCB-RA BLACK ROHS
Newark
65K7770
Switchcraft
PJRAN1X1U01X
1
HEADPHONE
JACK,MINI-STEREO,ROHS
Mouser
806-STX-3000
Kycon
STX-3000
TESTPOINTS AND SWITCHES
4
GNDx4
PC TESTPOINT, BLACK, ROHS
Digi-Key
5001K
Keystone Electronics
5001
6
HPL, HPR, SCL,
SDA, OUTM, OUTP
PC TESTPOINT, WHITE, ROHS
Digi-Key
5002K
Keystone Electronics
5002
2
S1, S2
SWITCH, MOM, 160G SMT 4×3 mm ROHS
Digi-Key
EG4344CT
E-Switch
TL1015AF160QG
SLOU254 – June 2009
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TPA2051D3EVM
13
TPA2051D3EVM Parts List
www.ti.com
Table 2. TPA2051D3EVM Parts List (continued)
QTY
Ref Des
Description
Vendor
Vendor Part No.
MANU
MANU Part No.
J587
Emerson NPCS
111-2223-001
SP2-001E
Norcomp Inc.
810-002-SP2L001
BINDING POSTS
4
GND, VDD,OUT+,
OUT–
BINDING-POST,NONINS,THRU,ROHS
Digi-Key
USBPWR,JP10, J1,
J2,DVDD, JP7, JP9,
JP6(SE), JP8(SE)
SHUNT, BLACK AU FLASH 2mmLS
Digi-Key
4
SO1–SO4
4-40 SCREW, STEEL 0.250 IN
Digi-Key
H342
Building Fasteners
PMS 440 0025 PH
4
SO1–SO4
STANDOFF, 4-40, 0.5 in 3/16 in, ALUM RND F-F
Digi-Key
2027K
Keystone Electronics
2027
Component Count
107
SHUNTS
STANDOFFS AND HARDWARE
COMPONENTS NOT ASSEMBLED
C11, R8, R9, R10, R11, C15, C16, R4, R5, OUT, PWR, IN
14
TPA2051D3EVM
SLOU254 – June 2009
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