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Texas Instruments TPA6141A2YFFEVM - User guides
User's Guide
SLOU261 – June 2009
TPA6141A2 EVM
1
2
3
4
Contents
Introduction ...................................................................................................................
Operation .....................................................................................................................
Reference .....................................................................................................................
TPA6141A2EVM Bill of Materials ..........................................................................................
1
2
3
5
List of Tables
1
1
TPA6141A2EVM Bill of Materials .......................................................................................... 5
Introduction
This section provides an overview of the Texas Instruments (TI) TPA6141A2 DirectPath™ stereo
headphone amplifier evaluation module (EVM). It includes a brief description of the module and a list of
EVM specifications.
1.1
Description
The TPA6141A2 is a DirectPath™ stereo headphone amplifier capable of delivering 25 mW/Ch into 16 Ω
and 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.
1.2
EVM Specifications
Supply voltage range, VDD
Supply current, IDD
Continuous output power, PO, VDD = 5 V, 16 Ω, THD+N = 1 %
2.5 V to 5.5 V
0.5 A, maximum
25 mW
DirectPath is a trademark of Texas Instruments.
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TPA6141A2 EVM
1
Operation
2
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Operation
This section describes how to operate the TPA6141A2EVM.
2.1
Quick-Start List for Stand-Alone Operation
Use the following steps when operating the TPA6141A2EVM stand alone or when connecting the EVM
into an existing circuit.
2.1.1
Power and Ground
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 the
EVM, first connect the ground connection to the GND connector, and then connect the positive supply
to the VDD connector. Verify that the connections are made to the correct banana jacks.
2.1.2
Inputs and Outputs
2.1.2.1
1.
2.
3.
Audio
Verify that the audio source is set to the minimum level.
Connect the audio source to the inputs, INL and INR. Shunt JP1 and JP2 for single-ended input.
Connect a headset or other load to the headphone jack.
2.1.2.2
Shutdown Controls
1. Shutdown is controlled by pushbutton S1. Press and hold S1 to place the TPA6141A2 in shutdown.
Release S1 to reactivate the TPA6141A2.
2.1.3
Gain Setting
Set the gain of the TPA6141A2 at GAIN. Set GAIN = 0 for 0 dB. Set GAIN = 1 for 6 dB.
2.1.4
Power Up
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 operation
of the EVM should begin.
3. Adjust the audio signal source as needed.
2
TPA6141A2 EVM
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JP2
2
1
VDD
JP1
2
1
Vdd
2
3
1
1
GND
1.0ufd/16V
C4
1.0ufd/16V
C3
1.0ufd/16V
C2
1.0ufd/16V
C5
0805
L1
2
GND
2.2ufd/10V
1
3
J1
2
1
Vdd
EN
HPVDD
SW
A4
R6
C9
S1
GND
0.1ufd/16V
1
2
TPA6141A2YFF
100K
Vdd
D1
D2
B3
A1
D4
C4
B4
A3
C3
B1
A2
C1
B2
C2
D3
C7
1.0ufd/16V
1.0ufd/16V
C6
Vdd
2.2ufd/10V
C8
0.0
R2
0.0
R1
OUTR
OUTL
0.0
GND
R5
1
2
DNP
GND
JP3
1
2
3
5
4
0.5in 0.5in 0.5in 0.5in
STANDOFF HARDWARE
DNP
R4
DNP
R3
OUT
3.1
3
2
U1
3
INR
INL
C1
www.ti.com
Reference
Reference
This section includes the EVM schematic, board layout reference, and parts list.
TPA6141A2EVM Schematic
TPA6141A2 EVM
3
Reference
3.2
www.ti.com
TPA6141A2EVM PCB Layers
1
GND
LOW
HIGH
1
GND
TPA6141A2YFFEVM 6508214 - Rev A
TOP LAYER
1
1
BOTTOM LAYER
4
TPA6141A2 EVM
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TPA6141A2EVM Bill of Materials
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4
TPA6141A2EVM Bill of Materials
Table 1. TPA6141A2EVM Bill of Materials
Qty.
6
Reference
Description
C1, C2, C3, C4,
Capacitor, ceramic, 1 µF, 10 V, X5R
C5, C6
1
C7
2
C8, C9
7
EN, GND,
HPVDD,
HPVSS, OUTL,
OUTR
2
SND Size
0603
Capacitor, not populated
0603
Capacitor, ceramic, 2.2 µF, 10 V, X7R
0603
Manufacturer/
Part Number
Panasonic
ECJ-1VB1A105K
Murata
GRM188R71A225KE15D
PC test point, white
Keystone
5002
GND,VDD
Binding post, 15a, uninsulated
Johnson Components
111-2223-001
2
GAIN, HIZ
Header, 3 pin, PCB 2.0mm ROHS
Norcomp
26630301RP2
4
GAIN, HIZ JP1,
JP2
Shunt, black au flash 2 mm
Norcomp
800-002-SP2-001
4
HW1, HW2,
HW3, HW4
Hex nut, 4-40, zinc/steel
Building Fasteners
HNZ440
4
HW1, HW2,
HW3, HW4
Standoff, 4-40 threaded M/F 0.50 in. ALUM-HEX
Keystone Electronics
8401
1
INL
Jack, RCA black, PCB-ra ROHS
Switchcraft
PJRAN1X1U01X
1
INR
Jack, RCA red, PCB-ra ROHS
Switchcraft
PJRAN1X1U03X
4
JP1, JP2, G1,
G0
Header, 2 pin, PCB 2 mm ROHS
Norcomp
26630201RP2
1
OUT
Jack, mini-stereo, PCB-ra, 3.5 mm ROHS
Kycon, Inc., P/N
STX-3000
1
R1
2
R2, R3
1
R4
Resistor, 0 Ω, 1/4W, SMD, ROHS
Vishay/Dale
CRCW12060000Z0EA
1
S1
Momentary switch, SMT-short, black tab, 160g
Panasonic
EVQ-PPBA25
1
U1
DirectPath headphone amplifier
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Resistor, 100 kΩ, 1/10 W, 5%, SMD, ROHS
0603
Resistor, not populated
1206
WCSP 16-ball
(YFF)
Panasonic
ERJ-3GEYJ104V
Texas Instruments
TPA6141A2YFF
TPA6141A2 EVM
5
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
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Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This
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This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
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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 of
HPVSS to HPVDD.
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 85°C. The EVM is designed to operate
properly with certain components above 85°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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Copyright 2009, Texas Instruments Incorporated
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