Texas Instruments TPA6043A4 User manual

1 Introduction
1.1 Description
User's GuideSLOU204 – August 2007
TPA6043A4 Audio Power Amplifier Evaluation Module
Contents1 Introduction ................................................................................................................... 12 Operation ..................................................................................................................... 33 Schematic and Bill of Materials ............................................................................................ 5
List of Figures
1 TI TPA6043A4 Audio Power Amplifier EVM – Top View ............................................................... 22 TPA6043A4 EVM Schematic ............................................................................................... 53 Top Side Layout.............................................................................................................. 64 Bottom Side Layout .......................................................................................................... 6
List of Tables
1 Gain Settings ................................................................................................................. 4
The TPA6043A4 evaluation module (EVM) consists of a single 2-W stereo speaker amplifier and 85-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 TPA6043A4 also contains an LDO capable of outputting 3.3 V with a maximumload of 120 mA.
DirectPath is a trademark of Texas Instruments.
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1.2 TPA6043A4 EVM Specifications
Introduction
Figure 1. TI TPA6043A4 Audio Power Amplifier EVM – Top View
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, 2 WTHD+N=10%
Headphone output power per channel, P
O
: 32 Ω, VDD = 5 V, THD+N=10% 85 mW
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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
Follow these steps to use the TPA6043A4 EVM 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 (J13) and GND (J14)banana jacks, 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 J3 and J4 from the EVM. If connecting to a floating source like a portable CD, install jumpersJ3 and J4. After setting the J3 and J4 jumpers appropriately, connect the input source to either thespeaker inputs (J1 and J2) or the headphone inputs (J11 and J12) or both.2. Connect a speaker across +LOUT (J15) and –LOUT (J16). Connect another speaker across +ROUT(J17) and –ROUT (J18).3. Install both gain jumpers GAIN0 (J5) and GAIN1 (J6). This sets the gain of the amplifier to the lowestlevel, 6 dB.4. Connect a set of headphones to the headphone output jack (J10).
Control Inputs1. Speaker Enable: This terminal is active-low. A LOW on the device terminal (<0.8 V) enables theamplifier; a HIGH (>2 V) on the device terminal places the amplifier in the SHUTDOWN state. Holdingdown switch S1 places the amplifier in the SHUTDOWN state. Releasing S1 returns the amplifier tothe active state.2. Headphone Enable: This terminal is active-high. A LOW on the device terminal (<0.8 V) shuts downthe headphone amplifier; a HIGH (>2 V) on the device terminal places the headphone amplifier in theactive state. Holding down switch S2 places the headphone amplifier in the SHUTDOWN state.Releasing S2 returns the headphone amplifier to the active state.3. GAIN0/GAIN1: Together, these terminals determine the gain of the amplifier. See Table 1 . Installing ajumper in J5 or J6 sets the respective terminal to GND. Removing the jumper sets the respectiveterminals to VDD. Removing jumpers increases the gain whereas installing jumpers decreases thegain. Logic levels are TTL compatible.4. Regulator Enable: Shunt J7 and remove jumper for J19 to enable the regulator output. Removejumper for J7 and shunt J19 to disable the regulator output. Never shunt J19 if J7 is shunt.
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2.1.4 Power Up
Operation
Table 1. Gain Settings
GAIN0 (J5)
(1)
GAIN1 (J6)
(1)
Amplifier Gain (dB)
ON ON 6ON OFF 10OFF ON 15.6OFF OFF 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, J5 and J6.
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3 Schematic and Bill of Materials
3.1 TPA6043A4 EVM Schematic
Schematic and Bill of Materials
Figure 2. TPA6043A4 EVM Schematic
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3.2 TPA6043A4 EVM PCB Layers
K002
Schematic and Bill of Materials
Figure 3. Top Side Layout
Figure 4. Bottom Side Layout
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3.3 TPA6043A4 EVM Bill of Materials
Schematic and Bill of Materials
REF. DESCRIPTION SIZE QTY MFG PART NO. VENDOR NO.
Capacitor, ceramic, 0.47- μF, ±10%,C1–C4 0603 4 TDK C1608X5R1A474K Digi-Key/445-1320-2-NDX5R, 10-V
Capacitor, ceramic, 1- μF, ±10%, X5R,C5–C12 0603 8 TDK C1608X5R1A105KT Digi-Key/445-1321-210-V
Capacitor, ceramic, 0.1- μF, ±10%,C13 0603 1 TDK C1608X7R1H104KT Digi-Key/445-1314-2X7R, 50-V
Capacitor, ceramic, 2.2- μF, 6.3 V,C14 0603 1 TDK C1608X5R0J225M Digi-Key/445-1323-1-NDX5R, 20%
Capacitor, ceramic, 10- μF, 6.3 V,C15–C17 0805 3 TDK C2012X5R0J106 Digi-Key/445-1363-1-NDY5R, 20%
R1–R5 Resistor, chip, 100 k Ω, 1/10W, 5% 0603 5 Panasonic ERJ-3GEYJ104V Digi-Key/P100KG
J1, J2, J11, J12 Phono jack, PC mount, switched 4 Switchcraft PJRAN1X1U03 Newark/16C1860
J3–J7 Header, 2 position, male 2 mm 5 Norcomp 2163-36-01-P2 Digi-Key/2163S-36
J10 Headphone jack 3 Kycon, Inc. STX-3081-5N Mouser/806-STX-3081-5t
Banana jack w/knurled thumbnutJ15–J18 6 Johnson 111-2223-001 Digi-Key/J587(nickel plate)
J19, J20 2 pin 0.1 in. breakaway header 0.1 in. 2 Sullins PBX26SAAN Digi-Key/PBC36SAAN
S1, S2 Switch, momentary, SMD, low profile 2 Panasonic EVQ-PPBA25 Digi-Key/P8086S
TPA6043A4 2-W stereo audio powerU1 RTV (S-PQFP-N32) 1 TI TPA6043A4amplifier
32-pin QFN 5-mm sq. and 0,5-mm spacing and exposed thermal pad
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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 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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