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
O
: 4 Ω, VDD = 5 V, THD+N=1% 2 WHeadphone output power per channel, P
O
: 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 www.ti.com
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
www.ti.com 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
Vdd
Vdd
Vdd
HPVddHPVdd
Vdd
Vdd Vdd Vdd Vdd
HPVdd
C7
10ufd/10V
10ufd/10V
C11
10ufd/10V
C16
C1
1.0ufd/10V
1.0ufd/10V
C2
C12
1.0ufd/10V
1.0ufd/10V
C13
1.0ufd/10V
C14
1.0ufd/10V
C15
1.0ufd/10V
C10
C3
0.47ufd/16V
0.47ufd/16V
C4
0.47ufd/16V
C5
0.47ufd/16V
C6
VDD
HPVDD
GND
C8
0.1ufd/25V
C9
2.2ufd/10V
HP_OUT
Shield
Right
Left
4NC5
3
2
1
JP1
21
12
JP2
GAIN0
3
2
1
1
2
3
GAIN1
2
3
HP_EN
SPKR_EN
3
2
1
REG_EN
3
2
1
HP_INL 3
2
1 1
2
3
HP_INR 3
2
1 1
2
3
ROUT+ ROUT-
LOUT- LOUT+
R1 R2
HPR HPL
TPA6047A4RHB
U1
1 2 3 4
17
10 11
12
9
567
25 26
27
28 32 31 30 29
8
13
14
15
16
18
1920
2122
2324
LINE IN
HEADPHONE IN
RCA (Red)
RCA (Black)
RCA (Black)
RCA (Red)
(3.5mm STEREO Mini)
HEADPHONE OUT
RIGHT SPEAKER OUT
LEFT SPEAKER OUT
0805
0805
0805
DNP
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 www.ti.com
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
<<
U1
C8
C6
<
<<
GAIN1
HP_EN
C4
<
HP_INL
HP_INR
VDD
<
C7
<
C2
HP_OUT
1
0
C11
C10
1
>1
0
C5
0>
1
SPKR_EN
C3
0
C1
C9
REG_EN
JP1
JP2
www.ti.com Schematic and Bill of Materials
Figure 2. Top Side Layout
SLOU240 – August 2007 List of Tables 5Submit Documentation Feedback

TPA6047A4RHB EVM
R2
R1
Schematic and Bill of Materials www.ti.com
Figure 3. Bottom Side Layout
List of Tables6 SLOU240 – August 2007Submit Documentation Feedback

3.3 TPA6047A4EVM Bill of Materials
www.ti.com 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.
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