Texas Instruments TPA2050D4EVM User manual

1 Introduction
1.1 Description
User's GuideSLOU206 – July 2008
TPA2050D4EVM Evaluation Module
Contents1 Introduction ................................................................................................................... 12 Operation ..................................................................................................................... 23 TPA2050D4EVM Schematic ............................................................................................... 84 TPA2050D4EVM PCB Layers ............................................................................................. 95 TPA2050D4EVM Parts List ............................................................................................... 11
List of Figures
1 Stereo Differential Mode Input Configuration ............................................................................ 32 Non-Differential Mode Input Configuration ............................................................................... 33 Place Shunts Horizontally Across SCL and SDA ........................................................................ 44 Starting the Software ........................................................................................................ 55 Software Interface ........................................................................................................... 66 Connect I
2
C Controls to JP3 ............................................................................................... 77 TPA2050D4EVM Schematic ............................................................................................... 88 TPA2050D4EVM – Top Layer ............................................................................................. 99 TPA2050D4EVM – Layer 2 ................................................................................................ 910 TPA2050D4EVM – Layer 3 ............................................................................................... 1011 TPA2050D4EVM – Bottom Layer ........................................................................................ 10
List of Tables
1 Jumpers Default Setting .................................................................................................... 22 Test Points Information ..................................................................................................... 43 TPA2050D4EVM Parts List ............................................................................................... 11
The TPA2050D4 is a stereo Class-D power amplifier along with a stereo DirectPath™ headphoneamplifier. Both input channels have 32-step volume control and the DirectPath™ headphone amplifier hasa 4-step level gain control with power limiter. The volume is controlled through an I
2
C™ interface. Allamplifiers have output short-circuit and thermal-overload protection.
The TPA2050D4 evaluation module(EVM) is a complete, stand-alone audio board. It contains theTPA2050D4 WCSP(YZK) Class-D audio subsystem.
All components and the EVM are Pb free.
DirectPath is a trademark of Texas Instruments.Windows is a trademark of Microsoft Corporation.I
2
C is a trademark of Philips Electronics.
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1.2 TPA2050D4EVM Specifications
2 Operation
2.1 Quick Start for Stand-Alone Operation
2.1.1 Software Installation Sequence
2.1.2 Evaluation Module Setup
Operation www.ti.com
VDD Supply voltage range –0.3 V to 6 VIDD Supply current 1.5 A MaximumPO Speaker Continuous output power per channel, 8 Ω, Vdd = 5 V, THD + N = 1% 1.25 WHeadphone Continuous output power per channel, 16 Ω, Vdd = 5 V, THD + N = 1% 145 mWRL Minimum load impedance (Speaker) 8 ΩMinimum load impedance (Headphone) 16 Ω
The TPA2050D4EVM can be evaluated in a stand-alone mode or when connected to existing circuits withI
2
C controls.
A desktop or laptop with Windows™ XP installed is required in the stand-alone operation. Connect theEVM to a computer with a USB cable. A jumper allows the TPA2050D4 to receive power from either theUSB or an external supply via banana plugs. The inputs accept standard RCA plugs. The speaker outputconnection accepts banana plugs. The headphone output connection accepts standard 3.5-mmheadphone plugs.
1. Insert the CD provided.2. Unzip the files to a temporary folder.3. Install TPA2050D4 software by executing setup.exe located in TPA2050D4 Setup.
Accept license agreement and defaults, and complete installation. Note: you can uninstall later withAdd/Remove Programs. It is unnecessary to repeat the preceding steps, once the software is installed.
1. Configure the jumpers as the following table for a default setting:
Table 1. Jumpers Default Setting
Jumper Default Setting
JP1 (DVDD) ShuntJP2, JP3 Shunt across each otherJP4 ShuntJP5, JP6, JP7, JP8 As shown in Figure 2JP9 (USB PWR) Remove
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Left Channel
Plugs Here
Right Channel
Plugs Here
LR
Stereo 1
RCA Plugs
Here
Stereo 2
RCA Plugs
Here
RLL R
www.ti.com Operation
2. There are different modes of input operation in for TPA2050D4, configure the input according to thefollow:
a. Stereo Differential Mode (MODE[2:0] = 011):Install shunts and connect RCA plugs as shown in Figure 1 .
Figure 1. Stereo Differential Mode Input Configuration
b. For all other modes, install shunts and connect RCA plugs as shown in Figure 2 .
Figure 2. Non-Differential Mode Input Configuration
3. Install shunts in JP2 and JP3 as shown in Figure 3 . This sets the TPA2050D4 to accept I
2
C inputsfrom the EVM itself.
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Shunts, Across SCL and SDA
Operation www.ti.com
Figure 3. Place Shunts Horizontally Across SCL and SDA
4. Ensure that all external power sources are set to OFF.5. Connect an external regulated power supply adjusted from 2.5 V to 5.5 V to the module VDD (J5) andGND (J6) banana jacks, taking care to observe the marked polarity.6. Install shunt in JP1 if DVDD is powered by the 1.8 V regulated supply from the EVM itself. If DVDD ispowered by another supply(between 1.8 V and 3.3 V), remove shunt in JP1 and connect the supply atheader 1 of JP1.7. HPVDD is set to VDD by default. If HPVDD is powered by another supply (between 2.5 V and 5.5 V),remove R17 and connect the supply at TP24.8. Connect audio source as mentioned in step 2.9. Connect headphones to J4.10. Connect speakers (8 Ωto 32 Ω) to the output (J11, J12 for LOUT and J13, J14 for ROUT). Thespeakers can also be connected to J2 and J3 if header connection is available in the speakers.11. Plug in the USB.12. Turn on power sources.13. The TPA2050D4 can also be powered by USB cable if the audio amplifier output power is less than100mW. Shunt JP9 and remove the power supply at J5 and J6 for USB power option.14. The following table provides the test points information on the EVM:
Table 2. Test Points Information
Test Point Description
TP1, TP2, TP3, TP4 OUTR+, OUTR-, OUTL-, OUTL+TP5, TP6, TP7, TP8 Filtered OUTR+, OUTR-, OUTL-, OUTL+TP9 HPVSSTP10 INR_1TP11 INL_1TP12 INL_2TP13 INR_2T14 HPRIGHTT15 HPLEFTTP18 DVDDTP20 SCLTP23 SDATP24 HPVDDTP27 VREFTP19, TP21, TP22, TP25, TP26 GND
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2.1.3 Using the Software
www.ti.com Operation
1. Start the TPA2050D4 Interface by clicking the Start menu and clicking on the Texas Instruments Inc ->TPA20050D4 icon.
Figure 4. Starting the Software
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Operation www.ti.com
2. The TPA2050D4 software interface is as shown in Figure 5 .
Figure 5. Software Interface
Note: The TPA2050D4 powers up with the amplifiers disabled, muted, and the gain set to theminimum. To hear an output, enable and unmute each channel, and set the gain to a higherlevel.
3. Follow these steps only if using a PC is both the music source and the computer on which theTPA2050D4 GUI is run.
When using WinXP, if after initially installing the software, the PC does not play music out of theheadphone jack:a. Open the Control Panel.b. Click on Sounds, Speech, and Audio Device Link under the Control Panel.c. Click on Sounds and Audio Device Properties link.d. Click on the Audio tab.e. Verify that the Default device under Sound playback is the audio driver of the PC HW, not theUSBMODEVM TPA2050D4 GUI driver.f. Change the driver in the menu to the PC Audio HW driver.g. Click on OK.4. Click the button in SW Shutdown to activate/deactivate software shutdown.5. Click the button in Speaker Output to enable/disable speaker output.6. Click the button in HP Output to enable/disable headphone output.A. Check/uncheck HP Left Mute to place headphone left output in/out of mute.B. Check/uncheck HP Right Mute to place headphone right output in/out of mute.7. Select input mode in the Channel Mode.8. Adjust the volume for both channels of the speaker amplifier by sliding the bar in Chan 1 and Chan 2.9. Adjust the headphone gain in HP Gain by sliding the bar.10. Select the headphone limiter level by clicking the voltage limit.11. Select the headphone impedance in Load Resistance, the Headphone Limiter Power Level will be
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2.2 Quick Start List When Connected to External I
2
C Controller
2.2.1 Evaluation Module Setup
GND
SCL
SDA
GND
External I C
Source
2
www.ti.com Operation
displayed.
12. I2C Status box reports the status of I
2
C communications. An error or failure has occurred if it turnsred.
13. Thermal box reports the status of thermal failure. A thermal fault has occurred if it turns red.14. The GUI has a built-in I2C programming interface. It has a log feature to record the changes that wasmade in the GUI. Follow the steps below to use the I2C programming function.
•At the top left corner of the GUI, click File to access the I2C programming interface.•Save Script can record the current register values. Select Save Script >> Click the folder icon tobrowse to the place where you want to save the script >> name the file in txt format then select OKto save.•Load Script can load the previously saved script to program the entire register file. Select LoadScript >> Click the folder icon to browse to the place where the script is located >> Select the filethen click OK >> Click Load.•I2C interface can program individual register value of TPA2050D4. Select I2C Interface >> I2Caddress is xE0, which is the address of TPA2050D4. Device address is from 1 to 7, which is theregister address of TPA2050D4.•Record Script can record all the changes made in the GUI and store the changes in a text file.Select Record Script >> Click the folder icon to browse to the place where you want to record thescript and then name the file in txt format >> Click Record Off to Record On, the green light will turnred to indicate that the recording is activated >> Click Exit >> Make changes in the GUI >> SelectRecord Script >> Click Record On to Record Off. The red light will turn green to indicate that therecording is deactivated. >> Click exit. All the changes will be recorded in the selected txt file.
The TPA2050D4EVM can be easily connected to existing circuits with I
2
C controls. Connections to theEVM module can be made using banana plugs for the power supply. The inputs accept standard RCAplugs. The output connection accepts standard 3.5-mm headphone plugs.
1. Install shunts in jumpers JP4. Remove shunts in JP2 and JP3 and connect I
2
C controls to JP3 asshown in Figure 6 .2. There are 2 options to power DVDD.•a. Connect USB cable to supply 1.8V for DVDD and remove R17.•b. Disconnect USB cable. Remove JP1 and connect an external power supply(from 1.75 V to 1.95V) at TP18 (to DVDD).
Figure 6. Connect I
2
C Controls to JP3
3. For all the other connections, follow the steps in section 2.1.2.
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3 TPA2050D4EVM Schematic
TPA2050D4EVM Schematic www.ti.com
Figure 7. TPA2050D4EVM Schematic
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4 TPA2050D4EVM PCB Layers
www.ti.com TPA2050D4EVM PCB Layers
Figure 8. TPA2050D4EVM – Top Layer
Figure 9. TPA2050D4EVM – Layer 2
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TPA2050D4EVM PCB Layers www.ti.com
Figure 10. TPA2050D4EVM – Layer 3
Figure 11. TPA2050D4EVM – Bottom Layer
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5 TPA2050D4EVM Parts List
www.ti.com TPA2050D4EVM Parts List
Table 3. TPA2050D4EVM Parts ListIte Ref Description Size Qty MFR / Part No. Vendor / Part No.m
10 C15, C44 CAP, TANT, 100 µF, 10V, 10%, LOESR SMD C 2 EPCOS/B45197A2107K309 DigiKey/495-1528-2-ND
12 C1–C4 Capacitor, ceramic, 1.0uF, ±10%, X5R, 10 V 603 4 TDK/C1608X5R1A105K Digikey/445-1321-2-ND
16 C6, C11 C16, Capacitor, ceramic, 1.0 µF, ±10%, X5R, 10 V 603 6 TDK/C1608X5R1A105KT DigiKey/445-1321-2C17, C22, C23
17 C5 Capacitor, ceramic, 1.0 µF, ±10%, X5R, 10 V 603 1 TDK/C1608X5R1A105KT DigiKey/445-1321-2
C6, C7 Capacitor, ceramic, 1.0 µF, ±10%, X5R, 10 V 603 2 TDK/C1608X5R1A105KT DigiKey/445-1321-2
19 C8, C9, C40 Capacitor, Ceramic, 0.1uF, ±10%, X5R, 25V 603 3 AVX/06033D104KAT2A DigiKey/478-1244-2-ND
20 C10, C41 Capacitor, ceramic, 1.0 µF, ±10%, X5R, 10 V 805 2 AVX/0805ZD105KAT2A DigiKey/478-1412-1-ND
23 C12, C43 6.3V, 10 µF, Ceramic Chip Capacitor, ±10%, 1206 2 TDK/C3216X5R0J106K DigiKey/445-1388-1X5R
24 C13, C14 Capacitor, ceramic, 47pF 50V C0G 5% 603 2 TDK/C1608C0G1H470J DigiKey/445-1277-2
28 C18, C19 50V, 33pF, Ceramic Chip Capacitor, ±5%, NPO 603 2 TDK/C1608C0G1H330J Digikey/445-1275-1-ND
30 C20 50V, 100pF, Ceramic Chip Capacitor, +/-5%, 603 1 TDK/C1608C0G1H101J DigiKey/445-1293-1NPO
31 C21 50V, 1 nF, Ceramic Chip Capacitor, ±5%, NPO 603 1 TDK/C1608C0G1H102J Mouser/810-
C1608C0G1H102J
34 C24– C27, C39, Capacitor, ceramic, 0.1 µF, ±10%, X5R, 25 V 603 6 AVX/06033D104KAT2A DigiKey/478-1244-2-NDC42
38 C28–C31 Capacitor, Ceramic, 25V, X5R, 1nF, 10% 603 DNP TDK/C0603X5R1E102K DigiKey/445-1790-2-ND
42 C32– C35 Capacitor, Ceramic, 50V, 5%, X7R, 4700 pF 805 DNP AVX/08055C472JAT2A Digikey/478-3770-2-ND
46 C36 Capacitor, Ceramic,47 µF, ±20%,X5R 1206 DNP Taiyo Yuden/LMK316BJ476ML-T Digi-Key/587-1780-1-ND
47 C37 Capacitor, ceramic, 1.0 µF, ±10%, X5R, 10 V 603 1 TDK/C1608X5R1A105KT DigiKey/445-1321-2
16 C38 Capacitor, ceramic, 1.0 µF, ±10%, X5R, 10 V 603 1 TDK/C1608X5R1A105KT DigiKey/445-1321-2
56 C47 Capacitor, Ceramic,47 µF, ±20%,X5R 1206 1 Taiyo Yuden/ LMK316BJ476ML-T Digi-Key/587-1780-1-ND
57 L1, L2 Inductor Bead, 600- Ω, 2A 805 2 TDK/MPZ2012S601A Digi-Key/445-2206-1-ND
59 L4–L7 Inductor Bead, 100 Ω, 4A 805 4 TDK/MPZ2012S101A DigiKey/445-1567-1-ND
59 L4–L7 Resistor, thick film, 0 Ω, 1/8 W, 5% 805 DNP Panasonic/ERJ-6GEY0R00V DigiKey/P0.0ATR-ND
65 JP1(DVDD) Header, 2 position, male, 2mm 1 Norcomp/26633601RP2 DigiKey/2663S-36-ND
66 JP2(I2C) Header, 2 position, male, 2mm 1 Norcomp/26633601RP3 DigiKey/2663S-36-ND
67 JP4(EEPROM) Header, 2 position, male, 2mm 1 Norcomp/26633601RP4 DigiKey/2663S-36-ND
68 JP7(INL_2) Header, 2 position, male, 2mm 1 Norcomp/26633601RP5 DigiKey/2663S-36-ND
69 JP8(INL_1) Header, 2 position, male, 2mm 1 Norcomp/26633601RP6 DigiKey/2663S-36-ND
70 JP9 (USB PWR) Header, 2 position, male, 2mm 1 Norcomp/26633601RP7 DigiKey/2663S-36-ND
71 JP10(MONO-) Header, 2 position, male, 2mm 1 Norcomp/26633601RP8 DigiKey/2663S-36-ND
73 JP5 (INR_2) Header, 3 position, male, 2mm 1 Norcomp/26633601RP10 DigiKey/2663S-36-ND
74 JP6 (INR_1) Header, 3 position, male, 2mm 1 Norcomp/26633601RP11 DigiKey/2663S-36-ND
75 JP3(I2C) Header, 4 position, male, 2mm 1 Norcomp/26633601RP2 DigiKey/2663S-36-ND
R1, R21 1206 DNP
108 R18 resistor chip, 100 k Ω, 0.1W, 1% 603 1 Panasonic/ERJ-3EKF1003V DigiKey/P100KHCT-ND
109 R2, R3, R15, DNP 603 DNPR16
111 R4, R8 Resistor, chip, 100 k Ω, 1/16W, 5% 603 2 Panasonic/ERJ-3GEYJ104V DigiKey/P100KGCT-ND
112 R5 Resistor, chip, 1.5 k Ω, 1/10W, 5% 603 1 Panasonic/ERJ-3GEYJ152V DigiKey/P1.5KGTR-NDT
113 R6, R7 Resistor, chip, 27.4 Ω, 1/16W 1% 603 2 Panasonic/ERJ-3EKF27R4V DigiKey/P27.4HCT-ND
116 R9 Resistor, chip, 3.09 k Ω, 1/16W 1% 603 1 Panasonic/ERJ-3EKF3091V DigiKey/P3.09KHCT-ND
117 R10 Resistor, chip, 2 k Ω, 1/10W, 5% 603 1 Panasonic/ERJ-3GEYJ202V DigiKey/P2.0KGCT-ND
118 R11– R14 Resistor, chip, 1 k Ω, 1/8W, 5% 805 4 Panasonic/ERJ-6GEYJ102V DigiKey/P1.0KACT-ND
R17 (VDDHP) Resistor, thick film, 0 Ω, 1/8 W, 5% 805 1 Panasonic/ERJ-6GEY0R00V DigiKey/P0.0ATR-ND
R19 603 DNP
134 Y1 6MHz Crystal SMD, 32 pF cap loading 1 ECS/ECS-60-32-5PXDN-TR DigiKey/XC1259CT-ND
133 J1 USB Type B Slave Connector Thru-Hole USB-B 1 Mill-Max/897-30-004-90-000000 DigiKey/ED90003-ND
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TPA2050D4EVM Parts List www.ti.com
Table 3. TPA2050D4EVM Parts List (continued)Ite Ref Description Size Qty MFR / Part No. Vendor / Part No.m
J2, J3 Header, 2 position, male, 2.54mm 2 Sullins/PBC36SAAN DigiKey/S1011E-36-ND
103 J7–J10 Phono jack, PC mount, switched 4 Switchcraft/PJRAN1X1U03 Newark/16C1860
J5, J6, J11–J14 Banana Jack w/knurled Thumbnut (nickel plate) 6 Emerson/111-2223-001 Digi-Key/J587
124 J4 Stereo headphone jack, 3.5mm STEREO 1 Kycon/STX-3000 Mouser/806-STX-3000-SMALL
125 S1, S2 Switch, momentary, SMD, low profile 2 Panasonic/EVQ-PPBA25 DigiKey/P8086SCT-ND
129 U1 Audio amplifier subsystem CSP25 1 TI/TPA2052D4 YZK
128 U2 USB Streaming Controller QFP48-5 1 TI/TAS1020BPFB
131 U3 3.3V LDO Regulator with reset output SOIC8 1 TI/TPS77533DGN
U4 64K 2-Wire Serial EEPROM I2C 1 Microchip/24LC64I/SN DigiKey/24LC64-I/SN-ND
130 U5 1.8V LDO Regulator with reset output SOIC8 1 TI/TPS77518DGN
132 U6 Bi-directional level translator DCU8 1 TI/TXS0102DCU
Q1 MOSFET N-CH 50V 220MA SOT-23 Fairchild/BSS138 Digikey/BSS138CT-ND
80 TP1(OUTL+), white stand off PAD 4TP2(OUTL-),
TP3(OUTR-),
TP4(OUTR+)
84 TP5– TP8 white stand off PAD 4
88 TP9(HPVSS) white stand off PAD 1
92 TP10–TP14 white stand off PAD 7(HPRIGHT),
TP15(HPLEFT),
TP18(DVDD)
98 TP19, black PAD 4TP21,TP22,
TP25, TP26(ground)
99 TP20(SCL), white PAD 4TP23(SDA),
TP24 (HPVDD),
TP27(VREF)
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EVALUATION BOARD/KIT IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSESONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must haveelectronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be completein terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmentalmeasures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit doesnot fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days fromthe date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYERAND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OFMERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claimsarising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and allappropriate precautions with regard to electrostatic discharge.EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANYINDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents orservices described herein.
Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. Thisnotice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/orsafety programs, please contact the TI application engineer or visit www.ti.com/esh .No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, orcombination in which such TI products or services might be or are used.FCC Warning
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSESONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radiofrequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which aredesigned to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments maycause interference with radio communications, in which case the user at his own expense will be required to take whatever measures maybe required to correct this interference.
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of -0.3 V to 6 V and the output voltage range of -0.3 V to VDD +0.3 .Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questionsconcerning the input range, please contact a TI field representative prior to connecting the input power.Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,please contact a TI field representative.During normal operation, some circuit components may have case temperatures greater than 85 °C. The EVM is designed to operateproperly with certain components above 85 °C as long as the input and output ranges are maintained. These components include but arenot limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identifiedusing the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation,please be aware that these devices may be very warm to the touch.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2008, Texas Instruments Incorporated

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