User's Guide
SLOU308–January 2011
TPA6139A2 EVM
This section provides an overview of the Texas Instruments (TI) TPA6139A2 DirectPath™ stereo
headphone amplifier evaluation module (EVM). It includes a brief description of the module and a list of
EVM specifications.
Contents
1
2
3
Description ................................................................................................................... 2
EVM Specifications ......................................................................................................... 2
Operation ..................................................................................................................... 2
3.1
Quick-Start List for Stand-Alone Operation ..................................................................... 2
4
5
Reference .................................................................................................................... 3
4.1
4.2
TPA6139A2EVM Schematic ...................................................................................... 4
TPA6139A2EVM PCB Layers .................................................................................... 5
TPA6139A2EVM Bill of Materials ......................................................................................... 6
List of Figures
1
2
3
4
5
TPA6139A2 EVM Top View ...............................................................................................
TPA6139A2 EVM Bottom View ...........................................................................................
TPA6139A2EVM Schematic...............................................................................................
Top Silkscreen...............................................................................................................
Bottom Silkscreen...........................................................................................................
List of Tables
1
2
EVM Specifications .........................................................................................................
TPA6139A2EVM Bill of Materials.........................................................................................
Figure 1. TPA6139A2 EVM Top View
1
SLOU308–January 2011
TPA6139A2 EVM
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Reference
3.1.2.2
Shutdown Controls
1. Shutdown is controlled by pushbutton S1. Press and hold S1 to place the TPA6139A2 in shutdown.
Release S1 to reactivate the TPA6139A2.
3.1.3
3.1.4
4
Gain Setting
The gain setting is programmed with the GAIN pin and is latched when the MUTE pin is set high. The
default gain of the TPA6139A2EVM is set to 3.5dB using a 49.9 kΩ resistor (R2). The gain resistor can be
adjusted to achieve a gain range from 0 dB to 20 dB. Refer to the datasheet for more details on gain
settings.
Power Up
Verify the correct voltage setting of the power supply and turn ON the power supply. Proper operation
of the EVM should begin.
2. Adjust the audio signal source as needed.
Reference
This section includes the EVM schematic and board layout reference.
3
SLOU308–January 2011
TPA6139A2 EVM
© 2011, Texas Instruments Incorporated
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TPA6139A2EVM Bill of Materials
5
TPA6139A2EVM Bill of Materials
Table 2. TPA6139A2EVM Bill of Materials
SMD
Size
Qty. Reference
Description
Manufacturer
Part Number
1
1
2
U1
Headphone AMP with 2 Vrms output TSSOP14-PW ROHS
LED, GREEN 2.0V SMD0805 ROHS
0603
0805
0603
TPA6139A2PW
LUMEX OPTO
LITTLEFUSE
LED1
SML-LXT0805GW-TR
SMAJ100A
TVS1, TVS2
TRANSIENT VOLTAGE SUPPRESSION SMA 100V 400W
ROHS
2
1
5
1
2
1
1
C7, C9
C8
CAP SMD0603 CERM 33PFD 50V 5% NPO ROHS
CAP SMD0603 CERM 100PFD 50V 5% NPO ROHS
CAP SMD0603 CERM 1.0UFD 10V 10% X5R ROHS
CAP SMD0805 CERM 10UFD 16V 10% X5R ROHS
RESISTOR SMD0603 ZERO OHMS 1/10W ROHS
RESISTOR SMD0603 330 OHMS 5% 1/10W ROHS
0603
0603
0603
0603
0603
0603
0805
MURATA
MURATA
MURATA
MURATA
GRM1885C1H330JA01D
GRM1885C1H101JA01D
GRM185R61A105KE36D
GRM21BR61C106KE15L
C1–C5
C6
R4, R6
R1
STACKPOLE ELECTRONICS RMCF0603ZT0R00
PANASONIC
VISHAY
ERJ-3GEYJ331V
R2
RESISTOR SMD0805 49.9K OHMS 1% 1/8W THICK FILM
ROHS
CRCW080549K9FKEA
3
R3, R8, R9
RESISTOR SMD0603 100K OHM 1% THICK FILM 1/10W
ROHS
0603
PANASONIC
ERJ-3EKF1003
1
1
1
1
J1
HEADER MALE 2PIN 100LS W/ FRICTION LOCK ROHS
JACK, RCA 3-PIN PCB-RA BLACK ROHS
JACK, RCA 3-PIN PCB-RA RED ROHS
MOLEX
22-23-2021
LIN
SWITCHCRAFT
SWITCHCRAFT
KYCON
PJRAN1X1U01X
PJRAN1X1U03X
STX-3150-5N-577C
RIN
HPOUT
JACK MINI STEREO 3.5mm LIME GREEN W/SHUNTS
ROHS
1
S1
SWITCH, MOM, 160G SMT 4X3MM ROHS
E-SWITCH
TL1015AF160QG
Components not assembled: C7, C9, R2, R5, R7, TVS1, and TVS2.
6
TPA6139A2 EVM
SLOU308–January 2011
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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
PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the
product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are
not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety and environmental measures typically found in end products that incorporate such semiconductor
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Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30
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This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
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EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 3.0 V to 3.6 V and the output voltage range of 3.0 V to 3.6 V .
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning 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 60°C. The EVM is designed to
operate properly with certain components above 40°C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using 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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