Texas Instruments TPA3125D2 EVM Manual de usuario

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

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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

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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

10 W8Ω, VCC = 24V, THD+N=10%R

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

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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

0603

1.0ufd/16V

1.0ufd/16V 0603

0805

1.0ufd/50V

GND

1000pfd/50V

0603

GND

470ufd/35V

1.0ufd/50V

0805

C10

GND

C11

0603

1000pfd/50V

GND

470ufd/35V

PVCC

1.0ufd/16V

0603

GND

0603

1.0ufd/16V

GND

10K

0603

PVCC

0603

10K

0603

1.0ufd/16V

GND

0.22ufd/25V 0603

C12

GND

C15

0603

0.22ufd/25V

GAIN0

2mm

GND

10K

0603

R3 R4

0603

10K

C13

0603

1000pfd/50V

GND GND

TPA3125D2N

C20

470ufd/35V

1500pfd/50V

0603

C16

10,1/4W

1206

GND

C17

0603

1500pfd/50V

1206

10,1/4W

GND

0.22ufd/63V

MKT

C18

GND

1.00K

0603

GND

470ufd/35V

C21

C19

MKT

0.22ufd/63V

GND

0603

1.00K

GND

2mm

2GAIN1

0.875in

GND

0.875in

GND

0.875in

GND

0.875in

GND

GAIN0 GAIN1

RCA (Red)

RCA (Black)

1GND

GND

PVCC

2LOUT

GND

ROUT

GND

PVCC

GND

0.0

1210

2 1 2W@60C

HS1

GND

33uH/2.3A

10ufd/50V

1210

C14

0805

80ohms/100MHz

0805

FB2

80ohms/100MHz

0805

FB3

FB4

0805

80ohms/100MHz

6A/250V

GRAY

STANDOFFS

SHUNTS

PVCCR

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Schematic and PCB Layers

Figure 3. TPA3125D2 EVM Schematic

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Schematic and PCB Layers

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Figure 4. TPA3125D2 EVM – Top Side Layout

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Schematic and PCB Layers

Figure 5. TPA3125D2 EVM – Bottom Side Layout

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4 Bill of Materials

Bill of Materials

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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.

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.

IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,and other changes to its products and services at any time and to discontinue any product or service without notice. Customers shouldobtain the latest relevant information before placing orders and should verify that such information is current and complete. All products aresold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standardwarranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except wheremandated by government requirements, testing of all parameters of each product is not necessarily performed.TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products andapplications using TI components. To minimize the risks associated with customer products and applications, customers should provideadequate design and operating safeguards.TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Informationpublished by TI regarding third-party products or services does not constitute a license from TI to use such products or services or awarranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectualproperty of the third party, or a license from TI under the patents or other intellectual property of TI.Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompaniedby all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptivebusiness practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additionalrestrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids allexpress and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is notresponsible or liable for any such statements.TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonablybe expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governingsuch use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, andacknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their productsand any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may beprovided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products insuch safety-critical applications.TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products arespecifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet militaryspecifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely atthe Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products aredesignated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designatedproducts in automotive applications, TI will not be responsible for any failure to meet such requirements.Following are URLs where you can obtain information on other Texas Instruments products and application solutions:Products ApplicationsAmplifiers amplifier.ti.com Audio www.ti.com/audioData Converters dataconverter.ti.com Automotive www.ti.com/automotiveDLP® Products www.dlp.com Broadband www.ti.com/broadbandDSP dsp.ti.com Digital Control www.ti.com/digitalcontrolClocks and Timers www.ti.com/clocks Medical www.ti.com/medicalInterface interface.ti.com Military www.ti.com/militaryLogic logic.ti.com Optical Networking www.ti.com/opticalnetworkPower Mgmt power.ti.com Security www.ti.com/securityMicrocontrollers microcontroller.ti.com Telephony www.ti.com/telephonyRFID www.ti-rfid.com Video & Imaging www.ti.com/videoRF/IF and ZigBee® Solutions www.ti.com/lprf Wireless www.ti.com/wireless
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