Texas Instruments TPA6047A4 User manual

1 Introduction

1.1 Description

1.2 TPA6047A4EVM Specifications

User's GuideSLOU240 – August 2007

TPA6047A4 Audio Power Amplifier Evaluation Module

Contents1 Introduction ................................................................................................................... 12 Operation ..................................................................................................................... 23 Schematic and Bill of Materials ............................................................................................ 4

List of Figures

1 EVM Schematic .............................................................................................................. 42 Top Side Layout.............................................................................................................. 53 Bottom Side Layout .......................................................................................................... 6

List of Tables

1 Gain Settings ................................................................................................................. 3

The TPA6047A4 evaluation module (EVM) consists of a single 2-W stereo speaker amplifier and 100-mWDirectPath™ headphone amplifier complete with a small number of external components mounted on acircuit board that can be used to drive speakers and headphones directly with external analog audiosources as inputs. The TPA6047A4 also contains an LDO capable of outputting 4.75 V with a load of 120mA.

Supply voltage range, VDD 4.5 V to 5.5 VSupply current, IDD 1 A, maximumSpeaker amplifier output power per channel, P

: 4 Ω, VDD = 5 V, THD+N=1% 2 WHeadphone output power per channel, P

: 16 Ω, VDD = 5 V, THD+N=10% 100 mW

DirectPath is a trademark of Texas Instruments.

SLOU240 – August 2007 TPA6047A4 Audio Power Amplifier Evaluation Module 1Submit Documentation Feedback

2 Operation

2.1 Quick-Start List for Stand-Alone Operation

2.1.1 Speaker Amplifier

2.1.2 Power Supply

2.1.3 Evaluation Module Preparations

Operation

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Follow these steps to use the TPA6047A4EVM stand-alone or when connecting it into existing circuits orequipment. Connections to the EVM can be made by inserting stripped wire or using banana plugs for thepower supply and output connections. The inputs accept standard RCA plugs.

1. Ensure that all external power sources are set to OFF.2. Connect an external regulated power supply adjusted to 5 V to the module VDD and GND bananajacks, taking care to observe marked polarity.

Inputs and Outputs1. If connecting to a fully differential input or a grounded input (the shield of the RCA is GND), removejumpers JP1 and JP2 from the EVM. If connecting to a floating source like a portable CD, installjumpers JP1 and JP2. After setting the JP1 and JP2 jumpers appropriately, connect the input source toeither the speaker inputs (SPKR_LIN, SPKR_RIN) or the headphone inputs (HP_INL, HP_INR) orboth.

2. Connect a speaker across LOUT+ and LOUT-. Connect another speaker across ROUT+ and ROUT-.3. Install both gain jumpers GAIN0 and GAIN1 at position 0. This sets the gain of the amplifier to thelowest level, 10 dB.4. Connect a set of headphones to the headphone output jack (HP_OUT).

Control Inputs1. Speaker Enable: Set jumper SPKR_EN at position 1 to enable the speaker amplifer. Set at 0 todisable the amplifier.2. Headphone Enable: Set jumper HP_EN at position 1 to enable the headphone amplifer. Set at 0 todisable the amplifier.3. GAIN0/GAIN1: Together, these terminals determine the gain of the amplifier. See Table 1 .4. Regulator Enable: Set jumper REG_EN at position 1 to enable the regulator. Set at 0 to disable theregulator.

List of Tables2 SLOU240 – August 2007Submit Documentation Feedback

2.1.4 Power Up

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Operation

Table 1. Gain Settings

GAIN1

(1)

GAIN0

(1)

Amplifier Gain (dB)

0 0 100 1 121 0 15.61 1 21.6(1)

OFF = Jumper REMOVED; ON = Jumper INSTALLED

1. Verify correct voltage and input polarity, and turn on the external power supplies.The EVM should begin operation.2. Adjust the input signal.3. Adjust the control inputs to the desired settings.4. Adjust the amplifier gain by installing/removing the gain jumpers, GAIN0 and GAIN1.

SLOU240 – August 2007 List of Tables 3Submit Documentation Feedback

3 Schematic and Bill of Materials

3.1 TPA6047A4EVM Schematic

Vdd

HPVddHPVdd

Vdd

HPVdd

10ufd/10V

C11

10ufd/10V

C16

1.0ufd/10V

C12

1.0ufd/10V

C13

1.0ufd/10V

C14

1.0ufd/10V

C15

1.0ufd/10V

C10

0.47ufd/16V

VDD

HPVDD

GND

0.1ufd/25V

2.2ufd/10V

HP_OUT

Shield

Right

Left

4NC5

JP1

JP2

GAIN0

GAIN1

HP_EN

SPKR_EN

REG_EN

HP_INL 3

HP_INR 3

ROUT+

ROUT-

LOUT-

LOUT+

R1 R2

HPR HPL

TPA6047A4RHB

1 2 3 4

567

1920

2122

2324

LINE IN

HEADPHONE IN

RCA (Red)

RCA (Black)

RCA (Red)

(3.5mm STEREO Mini)

HEADPHONE OUT

RIGHT SPEAKER OUT

LEFT SPEAKER OUT

0805

DNP

POWER INPUTS

(4.5-5.5V)

BOM ONLY

HP_EN

GAIN0

REG_EN

GAIN1

SPKR_EN

STANDOFFS

SHUNTS

(ALL SHUNTS JUMPERED P1-P2)

ALL CAPS AND RESISTORS ARE 0603 UNLESS SPECIFICALLY NOTED

Schematic and Bill of Materials

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Figure 1. EVM Schematic

List of Tables4 SLOU240 – August 2007Submit Documentation Feedback

3.2 TPA6047A4EVM PCB Layers

TPA6047A4RHB EVM

ROUT-

LOUT+

ROUT+

LOUT-

SPKR_RIN

C16

GAIN0

SPKR_LIN

HPL

HPR

HPVDD

C14

C12

C13

C15

GND

GAIN1

HP_EN

HP_INL

HP_INR

VDD

HP_OUT

C11

C10

SPKR_EN

REG_EN

JP1

JP2

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Schematic and Bill of Materials

Figure 2. Top Side Layout

SLOU240 – August 2007 List of Tables 5Submit Documentation Feedback

TPA6047A4RHB EVM

Schematic and Bill of Materials

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Figure 3. Bottom Side Layout

List of Tables6 SLOU240 – August 2007Submit Documentation Feedback

3.3 TPA6047A4EVM Bill of Materials

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Schematic and Bill of Materials

REF. DESCRIPTION SIZE QTY MFG PART NO. VENDOR NO.

C3–C6 Capacitor, ceramic, 0.47- µF, X7R, 16-V 0603 1 AVX 06033D104KAT2A Digi-Key/478-1244-1

C1, C2, C10, Capacitor, ceramic, 1- µF, ±10%, X5R,

0603 7 AVX ECJ-1VB1A105K Digi-Key/PCC2174TRC12-C15 10-V

C8 Capacitor, ceramic, 0.1- µF, X7R, 25-V 0603 1 AVX 06033D104KAT2A Digi-Key/478-1244-1

Murata GRM188R71A225KC9 Capacitor, ceramic, 2.2- µF, 10-V, X7R 0603 1 Digi-Key/490-4520-2Electronics E15D

Murata GRM21BR71A106KC7, C11, C16 Capacitor, ceramic, 10- µF, 10-V, X7R 0805 3 Digi-Key/490-3905-2Electronics E51L

R1, R2 Not Assembled

JP1, JP2 Header 2 pin, PCB 2 mm 2 Norcomp 26630201RP2 Digi-key/2663S-02

Gain0, Gain1,

HP_EN,

Header 3 pin, PCB 2 mm 5 Norcomp 26630301RP2 Digi-Key/2663S-03REG_EN,

SPKR_EN

HP_OUT Jack, mini-stereo, PCB-RA 3.5 mm 1 KYCON STX-3000 Mouser/806-STX-3000

HP_INL,

Jack, RCA 3 pin PCB-RA black 2 Switchcraft PJRAN1X1U01X Newark/65K7770SPKR_LIN

HP_INR,

Jack, RCA 3 pin PCB-RA red 2 Switchcraft PJRAN1X1U03X Newark/89K7617SPKR_RIN

KeystoneHPL, HPR PC testpoint, white 2 5002 Digi-Key/5002KElectronics

LOUT+, LOUTM, EmersonBinding post, 15-A uninsulated 4 111-2223-001 Digi-Key/J587ROUT+, ROUTM NPCS

KeystoneGND Binding post, black 15-A econo 1 7007 Digi-Key/7007KElectronics

KeystoneHPVDD, VDD Binding post, red, 15-A econo 2 7006 Digi-Key/7006KElectronics

Gain0(1-2),

Gain1(1-2)

NorcompHP_EN(1-2), Shunt, black AU flash 2 mm 5 810-002-SP2L001 Digi-Key/SP2-001EInc.REG_EN(1-2),

SPKR_EN(1-2)

2W stereo amp with stereo HP Texas TexasU1 1 TPA6047A4RHBQFN32-RHB Instruments Instruments/TPA6047A4RHB

HW1, HW2, BuildingHex Nut, 4-40, Zinc/Steel 4 HNZ440 Digi-Key/H216HW3, HW4 Fasteners

HW1, HW2, Standoff 4-40 Threaded M/F 0.50 in. Keystone

4 8401 Digi-Key/8401KHW3, HW4 Alum-Hex Electronics

32-pin QFN 5-mm sq. and 0,5-mm spacing and exposed thermal pad

SLOU240 – August 2007 List of Tables 7Submit Documentation Feedback

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 4.5 V to 5.5 V and the output voltage range of 0 V to 5.5 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 ＝2008, Texas Instruments Incorporated

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/automotiveDSP dsp.ti.com Broadband www.ti.com/broadbandClocks and Timers www.ti.com/clocks Digital Control www.ti.com/digitalcontrolInterface interface.ti.com Medical www.ti.com/medicalLogic logic.ti.com Military www.ti.com/militaryPower Mgmt power.ti.com Optical Networking www.ti.com/opticalnetworkMicrocontrollers microcontroller.ti.com Security www.ti.com/securityRFID www.ti-rfid.com Telephony www.ti.com/telephonyRF/IF and ZigBee® Solutions www.ti.com/lprf Video & Imaging www.ti.com/videoWireless www.ti.com/wireless

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