Texas Instruments TPA3125D2 EVM User manual

1 Introduction
1.1 Description
User's GuideSLOU250 – January 2009
TPA3125D2 EVM
Contents1 Introduction ................................................................................................................... 12 Quick Start for Stand-alone Operation .................................................................................... 33 Schematic and PCB Layers ................................................................................................ 54 Bill of Materials ............................................................................................................... 8
List of Figures
1 TPA3125D2 Audio Power Amplifier EVM - Top View ................................................................... 22 TPA3125D2 Audio Power Amplifier EVM - Bottom View ............................................................... 23 TPA3125D2 EVM Schematic............................................................................................... 54 TPA3125D2 EVM – Top Side Layout ..................................................................................... 65 TPA3125D2 EVM – Bottom Side Layout ................................................................................. 7
List of Tables
1 TPA3125D2 EVM Specifications .......................................................................................... 32 Gain Jumper Settings ...................................................................................................... 43 TPA3125D2 EVM Bill of Materials ......................................................................................... 8
The TPA3125D2 evaluation module (EVM) consists of a single 10-W, class-D, stereo audio poweramplifier, complete with a small number of external components mounted on a printed-circuit board. TheEVM can be used to directly drive speakers with an external analog audio source as the input. Figure 1and Figure 2 display the top and bottom views of the EVM, respectively. For additional information, consultthe TPA3125D2 data sheet (SLOS611 ).
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Introduction www.ti.com
Figure 1. TPA3125D2 Audio Power Amplifier EVM - Top View
Figure 2. TPA3125D2 Audio Power Amplifier EVM - Bottom View
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1.2 EVM Specifications
2 Quick Start for Stand-alone Operation
2.1 Power Supply
2.2 Evaluation Module Preparations
2.2.1 Inputs and Outputs
2.2.2 Control Inputs
www.ti.com Quick Start for Stand-alone Operation
Table 1. TPA3125D2 EVM Specifications
Value Units
VCC Supply voltage range 10 to 26 VICC Supply current 3 AContinuous output power per channelP
O
10 W8Ω, VCC = 24V, THD+N=10%R
L
Minimum load impedance 4 Ω
Use these procedures to operate the TPA3125D2 EVM in a stand-alone configuration, or when connectingit into existing circuits or equipment. Connections to the EVM module can be made by inserting strippedwire for the power supplies. Two pin male headers are provided for the speaker connections and theinputs accept standard RCA plugs.
1. Ensure that all external power sources are set to OFF.2. Connect an external regulated power supply adjusted from 10 V to 26 V to the module VCC and GNDterminal block ( J1), taking care to observe marked polarity.
1. Connect the left and right speakers across LOUT and ROUT respectively.2. Install both gain jumpers GAIN0 and GAIN1. This sets the amplifier gain to the lowest level, 20 dB.
•SHUTDOWN (S1) —terminal is active LOW. A LOW on the device terminal (less than 0.8 V) shutsdown the amplifier; a HIGH (greater than 2 V) on the device terminal places the amplifier in the activestate. Pressing and holding the switch S1 places the amplifier in the SHUTDOWN state. Releasing theS1 switch returns the amplifier to the active state. This terminal is VCC compliant.•MUTE (S2)—terminal is active HIGH. A HIGH (greater than 2 V) on this terminal immediatelyterminates audio playback through the speakers; a LOW (less than 0.8 V) enables the device. Theoutputs remain switching with a 50% duty cycle. The EVM S2 switch controls the state of the MUTEterminal. Pressing and holding the S2 switch places the amplifier in the MUTE state. Releasing the S2switch returns the amplifier to the active state. This terminal is VCC compliant.•GAIN0/GAIN1—Together, these terminals determine the gain of the amplifier (see Table 2 ). Installinga jumper in GAIN0 or GAIN1 sets the respective terminal to GND. Removing the jumper sets therespective terminals to VCC. Removing jumpers increases the gain while installing jumpersdecreases the gain. Logic levels are TTL compatible. These terminals are VCC compliant.
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2.2.3 Applying Power to the EVM
Quick Start for Stand-alone Operation www.ti.com
Table 2. Gain Jumper Settings
(1)
GAIN1 GAIN0 Amplifier Gain (dB)
ON ON 20ON OFF 26OFF ON 32OFF OFF 36(1)
OFF denotes jumper is REMOVED; ON denotes jumperINSTALLED.
1. Verify correct voltage and input polarity for the external power supplies. Turn ON. The EVM startsoperation.
2. Adjust the input signal.3. Adjust the control inputs to the desired settings as described in the Control Inputs section.4. Adjust the amplifier gain by installing or removing the gain jumpers, GAIN0 and GAIN1 to yield thegain values described in Table 2 .
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3 Schematic and PCB Layers
PVCC U1
FB1
PVCCR
C5
0603
1.0ufd/16V
C6
1.0ufd/16V 0603
C2 0805 1.0ufd/50V
GND
1000pfd/50V 0603 C3
GND
GND
470ufd/35V HE C1
+
1.0ufd/50V 0805 C10
GND
C11 0603 1000pfd/50V
GND
GND
C9 HE 470ufd/35V
+
PVCC
C7
1.0ufd/16V
0603
GND
C4 0603 1.0ufd/16V
GND
10K
0603
R1
PVCC
R2
0603 10K
0603
1.0ufd/16V
C8
GND
GND
GND
GND
0.22ufd/25V 0603
C12
GND
C15
0603
0.22ufd/25V
GAIN0
2
1
2mm
GND GND
10K 0603
R3 R4
0603 10K
C13 0603 1000pfd/50V
GND GND
TPA3125D2N
4 3 2 1 5
10
6
7
8 9
19 20 18 17
16 11
12
13
15 14
C20
HE
470ufd/35V
+
1500pfd/50V 0603 C16
10,1/4W 1206
R5
GND
C17 0603 1500pfd/50V
R6
1206 10,1/4W
GND
0.22ufd/63V MKT C18
GND
1.00K 0603
R7
GND
470ufd/35V
HE
C21
+
C19 MKT 0.22ufd/63V
GND
R8
0603 1.00K
GND
2mm
1
2GAIN1
0.875in
GND
0.875in
GND
0.875in
GND
0.875in
GND
GAIN0 GAIN1
1
2
3
RCA (Red)
RCA (Black)
3
2
1GND
GND
S1
GND
S2
PVCC
1
2LOUT
GND
2
1
ROUT
GND
PVCC
GND
0.0
1210
R9
2 1 2W@60C
HS1
GND
33uH/2.3A
L1
L2
33uH/2.3A
10ufd/50V 1210 C14
0805
80ohms/100MHz
12
80ohms/100MHz
0805
FB2
12
80ohms/100MHz
0805
FB3
12
FB4
0805
80ohms/100MHz
12
6A/250V
GRAY
J1
2
1
STANDOFFS
SHUNTS
PVCCR
www.ti.com Schematic and PCB Layers
Figure 3. TPA3125D2 EVM Schematic
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Schematic and PCB Layers www.ti.com
Figure 4. TPA3125D2 EVM – Top Side Layout
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www.ti.com Schematic and PCB Layers
Figure 5. TPA3125D2 EVM – Bottom Side Layout
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4 Bill of Materials
Bill of Materials www.ti.com
All components should be lead-free.
Table 3. TPA3125D2 EVM Bill of MaterialsRefDes Description Qty Mfr Part No. Mfr Vendor Part No. Vendor
U1 10W STEREO CLASS-D AUDIO POWER AMP 1 TPA3125D2N Texas TPA3125D2N TexasN20-DIP ROHS Instruments Instruments
C3, C11, C13 CAP 1000PFD 50V 5% CERM 0603 COG ROHS 3 C1608C0G1H102J TDK Corp. 445-1293-1 Digi-Key
C16, C17 CAP SMD0603 CERM 1500pfd 50V 10% X7R ROHS 2 C0603C152K5RACTU Kemet 399-1084-1 Digi-Key
C12, C15 CAP SMT0603 CERM 0.22 µF, 25V 10% X5R ROHS 2 06033D224KAT2A AVX 478-1245-1 Digi-Key
C18, C19 METAL POLY CAP THU MKT 0.22 µF, 63V 10% 2 B32559C224K000 EPCOS 495-2814 Digi-KeyROHS
C4–C8 CAP SMT0603 CERM 1.0 µF, 16V 10% X5R ROHS 5 ECJ-1VB1C105K Panasonic PCC2224CT Digi-Key
C2, C10 CAP SMT0805 CERM 1.0 µF, 50V 10% X7R ROHS 2 GRM21BR71H105KA12L Murata 490-4736-1 Digi-Key
C14 CAP SMD1210 CERM 10 µF, 50V Y5V ROHS 1 ECJ-4YF1H106Z Panasonic PCC2308CT Digi-Key
C1, C9, C20, CAP 470UFD 35V RAD ALUM ELEC HE ROHS 4 UHE1V471MHD6 Nichicon 493-1583 Digi-KeyC21
R7, R8 RES 1.00K OHM 1/10W 1% SMD 0603 ROHS 2 RC0603FR-071KL Yageo 311-1.00KHRCT Digi-Key
R9 RESISTOR SMD1210 0.0 Ω1/3W ROHS 1 CRCW12100000Z0EA Vishay 541-0.0VCT Digi-Key
R1–R4 RES SMT0603 10K 5% 1/10W ROHS 4 ERJ-3GEYJ103V Panasonic P10KGCT Digi-Key
R5, R6 RESISTOR SMT1206 10.0 Ω1% 1/4W ROHS 2 ERJ-8ENF10R0 Panasonic P10.0FCT Digi-Key
L1, L2 INDUCTOR SERIES 11RHBP/A7503AY 33 µH/2.3A 2 A7503AY-330M TOKO A7503AY-330M TOKOROHS
FB1–FB4 FERRITE BEAD SMD0805 80 Ωat 100MHz 5A 4 HI0805R800R-10 Steward 240-2395-1 Digi-KeyROHS
GAIN0, HEADER 2 PIN, PCB 2.0MM ROHS 2 26630201RP2 Norcomp 2663S-02 Digi-KeyGAIN1
LOUT, ROUT HEADER MALE 2PIN 100LS W/ FRICTION LOCK 2 22-23-2021 Molex WM4200 Digi-KeyROHS
RIN JACK, RCA 3-PIN PCB-RA RED ROHS 1 PJRAN1X1U03X Switchcraft 89K7617 Newark
LIN JACK, RCA 3-PIN PCB-RA BLACK ROHS 1 PJRAN1X1U01X Switchcraft 65K7770 Newark
J1 TERMINAL BLOCK 2PIN 6A/250V GRAY 7mm 1 ED655/2DS On Shore ED1534 Digi-KeyPITCH 16-28AWG ROHS Technology
S1, S2 SWITCH MOM TACT 100GF TH 4PIN 6 ×6MM ROHS 2 FSMCDH Tyco- 450-1654 Digi-KeyAlcoswitch
GAIN0, SHUNT, BLACK AU FLASH 2mmLS 2 810-002-SP2L001 Norcomp Inc. SP2-001E Digi-KeyGAIN1
HS1 HEATSINK DIP20 BLACK 2W ROHS 1 580400B00000G AAVID 580400B00000G AAVIDThermalloy Thermalloy
SO1–S04 4-40 SCREW, STEEL 0.250 IN 4 PMS 440 0025 PH Building H342 Digi-KeyFasteners
SO1–S04 STANDOFF, 4-40, 0.875IN ×3/16IN, ALUM RND F-F 4 2030 Keystone 2030K Digi-KeyElectronics
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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.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2008, Texas Instruments Incorporated
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 10 V to 30 V and the output voltage range of 0 V to 30 V.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 © 2009, Texas Instruments Incorporated

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