Texas Instruments TPA6141A2 Manuel utilisateur

1 Introduction

1.1 Description

1.2 EVM Specifications

User's GuideSLOU261 – June 2009

TPA6141A2 EVM

Contents1 Introduction ................................................................................................................... 12 Operation ..................................................................................................................... 23 Reference ..................................................................................................................... 34 TPA6141A2EVM Bill of Materials .......................................................................................... 5

List of Tables

1 TPA6141A2EVM Bill of Materials .......................................................................................... 5

This section provides an overview of the Texas Instruments (TI) TPA6141A2 DirectPath™ stereoheadphone amplifier evaluation module (EVM). It includes a brief description of the module and a list ofEVM specifications.

The TPA6141A2 is a DirectPath™ stereo headphone amplifier capable of delivering 25 mW/Ch into 16 Ωand requires no output DC blocking capacitors.

The TPA6141A2 EVM is a complete, stand-alone audio board. It contains the TPA6141A2 WCSP (YFF)DirectPath™ stereo headphone amplifier. All components are Pb-free.

Supply voltage range, V

2.5 V to 5.5 VSupply current, I

0.5 A, maximumContinuous output power, P

, V

= 5 V, 16 Ω, THD+N = 1 % 25 mW

DirectPath is a trademark of Texas Instruments.

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2 Operation

2.1 Quick-Start List for Stand-Alone Operation

2.1.1 Power and Ground

2.1.2 Inputs and Outputs

2.1.2.1 Audio

2.1.2.2 Shutdown Controls

2.1.3 Gain Setting

2.1.4 Power Up

Operation

www.ti.com

This section describes how to operate the TPA6141A2EVM.

Use the following steps when operating the TPA6141A2EVM stand alone or when connecting the EVMinto an existing circuit.

1. Verify that the external power sources are set to OFF.2. Set the power supply voltage between 2.5 V and 5.5 V. When connecting the power supply to theEVM, first connect the ground connection to the GND connector, and then connect the positive supplyto the V

connector. Verify that the connections are made to the correct banana jacks.

1. Verify that the audio source is set to the minimum level.2. Connect the audio source to the inputs, INL and INR. Shunt JP1 and JP2 for single-ended input.3. Connect a headset or other load to the headphone jack.

1. Shutdown is controlled by pushbutton S1. Press and hold S1 to place the TPA6141A2 in shutdown.Release S1 to reactivate the TPA6141A2.

Set the gain of the TPA6141A2 at GAIN. Set GAIN = 0 for 0 dB. Set GAIN = 1 for 6 dB.

1. Verify the correct connections as described in Sections 2.1.1 and 2.1.2.2. Verify the correct voltage setting of the power supply and turn ON the power supply. Proper operationof the EVM should begin.3. Adjust the audio signal source as needed.

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3 Reference

3.1 TPA6141A2EVM Schematic

OUT

0.5in 0.5in 0.5in 0.5in

Vdd

1.0ufd/16V

JP1 2

2.2ufd/10V

1.0ufd/16V

0.0

INR

INL 3

JP2

HPVDD

OUTL

OUTR

VDD

GND

Vdd

3 2

1 2

JP3

DNP

0.1ufd/16V

R6 100K

DNP

TPA6141A2YFF

Vdd

0.0

0805

STANDOFF HARDWARE

GND GND

www.ti.com

Reference

This section includes the EVM schematic, board layout reference, and parts list.

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3.2 TPA6141A2EVM PCB Layers

BOTTOM LAYER

TOP LAYER

TPA6141A2YFFEVM 6508214 - Rev A

GND

LOW

GND

HIGH

Reference

www.ti.com

TPA6141A2 EVM4 SLOU261 – June 2009Submit Documentation Feedback

4 TPA6141A2EVM Bill of Materials

www.ti.com

TPA6141A2EVM Bill of Materials

Table 1. TPA6141A2EVM Bill of Materials

Manufacturer/Qty. Reference Description SND Size

Part Number

C1, C2, C3, C4, Panasonic6 Capacitor, ceramic, 1 µF, 10 V, X5R 0603C5, C6 ECJ-1VB1A105K1 C7 Capacitor, not populated 0603

Murata2 C8, C9 Capacitor, ceramic, 2.2 µF, 10 V, X7R 0603

GRM188R71A225KE15DEN, GND,

HPVDD, Keystone7 PC test point, whiteHPVSS, OUTL, 5002OUTR

Johnson Components2 GND,VDD Binding post, 15a, uninsulated

111-2223-001

Norcomp2 GAIN, HIZ Header, 3 pin, PCB 2.0mm ROHS

26630301RP2GAIN, HIZ JP1, Norcomp4 Shunt, black au flash 2 mmJP2 800-002-SP2-001HW1, HW2, Building Fasteners4 Hex nut, 4-40, zinc/steelHW3, HW4 HNZ440HW1, HW2, Keystone Electronics4 Standoff, 4-40 threaded M/F 0.50 in. ALUM-HEXHW3, HW4 8401

Switchcraft1 INL Jack, RCA black, PCB-ra ROHS

PJRAN1X1U01X

Switchcraft1 INR Jack, RCA red, PCB-ra ROHS

PJRAN1X1U03XJP1, JP2, G1, Norcomp4 Header, 2 pin, PCB 2 mm ROHSG0 26630201RP2

Kycon, Inc., P/N1 OUT Jack, mini-stereo, PCB-ra, 3.5 mm ROHS

STX-3000

Panasonic1 R1 Resistor, 100 k Ω, 1/10 W, 5%, SMD, ROHS 0603

ERJ-3GEYJ104V2 R2, R3 Resistor, not populated 1206

Vishay/Dale1 R4 Resistor, 0 Ω, 1/4W, SMD, ROHS

CRCW12060000Z0EA

Panasonic1 S1 Momentary switch, SMT-short, black tab, 160g

EVQ-PPBA25WCSP 16-ball Texas Instruments1 U1 DirectPath headphone amplifier

(YFF) TPA6141A2YFF

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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 HPVSS - 0.3 V to HPVDD + 0.3 V and the output voltage range ofHPVSS to HPVDD.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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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.
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