Texas Instruments TPS40074EVM-001 User manual

User’s Guide
TPS40074 Buck Controller Evaluation Module User's
Guide
Table of Contents
1 Introduction.............................................................................................................................................................................2
1.1 Description......................................................................................................................................................................... 2
1.2 Applications........................................................................................................................................................................2
1.3 Features............................................................................................................................................................................. 2
2 TPS40074EVM-001 Electrical Performance Specifications................................................................................................ 2
3 Schematic ...............................................................................................................................................................................4
3.1 Adjusting Output Voltage (R5 and R6)............................................................................................................................... 5
3.2 Using Remote Sense (J3).................................................................................................................................................. 5
3.3 5V Input Operation (R10 and R15).................................................................................................................................... 5
4 Test Setup................................................................................................................................................................................6
4.1 Equipment.......................................................................................................................................................................... 6
4.2 Equipment Setup................................................................................................................................................................7
4.3 Start-Up/Shutdown Procedure........................................................................................................................................... 8
4.4 Equipment Shutdown......................................................................................................................................................... 8
5 TPS40074EVM Typical Performance Data and Characteristic Curves...............................................................................9
5.1 Efficiency............................................................................................................................................................................9
5.2 Line and Load Regulation.................................................................................................................................................. 9
6 EVM Assembly Drawings and Layout.................................................................................................................................10
7 List of Materials.....................................................................................................................................................................13
8 Revision History................................................................................................................................................................... 14
List of Figures
Figure 3-1. TPS40074EVM-001 Power Stage/Control Schematic Reference Only, See Table 3 for Specific Values................. 4
Figure 4-1. TPS40074EVM-001 Recommended Test Setup....................................................................................................... 7
Figure 4-2. Output Ripple Measurement – Tip and Barrel using TP15 and TP16....................................................................... 8
Figure 5-1. TPS40074EVM-001 Efficiency V12V_IN = 10 V–14 V, V1V5_OUT = 1.5 V, I1V5_OUT = 0 A–15 A...................................9
Figure 5-2. TPS40074EVM-001 Line and Load Regulation – ±1% Window............................................................................... 9
Figure 6-1. TPS40074EVM-001 Component Placement (Viewed from Top).............................................................................10
Figure 6-2. TPS40074EVM-001 Silkscreen (Viewed from Top).................................................................................................10
Figure 6-3. TPS40074EVM-001 Top Copper (Viewed from Top)............................................................................................... 11
Figure 6-4. TPS40074EVM-001 Layer 2 (X-Ray View from Top)...............................................................................................11
Figure 6-5. TPS40074EVM-001 Layer 3 (X-Ray View from Top).............................................................................................. 12
Figure 6-6. TPS40074EVM-001 Bottom Copper (X-Ray View from Top).................................................................................. 12
List of Tables
Table 2-1. TPS40074EVM-001 Electrical and Performance Specifications.................................................................................2
Table 3-1. Adjusting V1V5_OUT With R14...................................................................................................................................... 5
Table 7-1. TPS40074EVM-001 Bill of Materials.........................................................................................................................13
Trademarks
All trademarks are the property of their respective owners.
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1 Introduction
The TPS40074EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.5-V
output at up to 15 A from a 12-V input bus. The EVM is designed to start up from a single supply, so no
additional bias voltage is required for start-up. The module uses the TPS40074 high frequency controller with
remote sense.
1.1 Description
The TPS40074EVM-001 is designed to use a regulated 12-V (between 10-V and 14-V) bus to produce a high
current, regulated 1.5-V output at up to 15 A of load current. The TPS40074EVM-001 is design to demonstrate
the TPS40074 in a typical regulated bus to low-voltage application while providing a number of test points to
evaluate the performance of the TPS40074 in a given application. The EVM can be modified to support output
voltages from 0.9 V to 3.3 V by changing a single resistor. The TPS40074EVM-001 has been built to the sample
application used in the TPS40074 Midrange Input Synchronous Buck Controller With Voltage Feed-Forward
Data Sheet, except the switching frequency has been lowered to 400 kHz to reduce switching losses in the
power FETs, and the RKFF resistor (R10) increased to maintain the UVLO level.
1.2 Applications
• Non-isolated medium current point of load and low voltage bus converters
• Merchant power modules
• Networking equipment
• Telecommunications equipment
• DC power distributed systems
1.3 Features
• 10-V to 14-V input range
• 1.5-V fixed output, adjustable with single resistor
• 15-ADC steady state output current
• 400-kHz switching frequency
• Single main switch MOSFET and single synchronous rectifier MOSFET single
• Component side, surface mount design on a 3-inch × 3-inch evaluation board
• Four-layer PCB with all components on the top side
• Convenient test points for probing critical waveforms and non-invasive loop response testing
2 TPS40074EVM-001 Electrical Performance Specifications
Table 2-1. TPS40074EVM-001 Electrical and Performance Specifications
PARAMETER NOTES AND CONDITIONS MIN TYP MAX UNIT
INPUT CHARACTERISTICS
Input voltage range 10 14 V
Max input current VIN = 10 V, IOUT = 15 A 2.75 A
No-load input current VIN = 14 V, IOUT = 0 A 45 mA
OUTPUT CHARACTERISTICS
Output voltage R6 = 9.53 k, R5 = 105 k 1.45 1.50 1.55 V
Output voltage regulation Line regulation (10 V < VIN < 14 V, IOUT = 5 A) 1%
Load regulation (10 V < IOUT < 15 A, VIN = 12 V) 1%
Output voltage ripple VIN = 14 V, IOUT = 15 A 25 50 mVpp
Output load current 0 15 A
Output over current 23 A
SYSTEM CHARACTERISTICS
Switching frequency 360 400 440 kHz
Peak efficiency VOUT = 1.5 V, 8 A < IOUT < 12 A V12V_IN = 10 V 87%
V12V_IN = 12 V 85%
V12V_IN = 14 V 83%
Introduction www.ti.com
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Table 2-1. TPS40074EVM-001 Electrical and Performance Specifications (continued)
PARAMETER NOTES AND CONDITIONS MIN TYP MAX UNIT
Full load efficiency VOUT = 1.5 V, IOUT = 15 A V12V_IN = 10 V 84%
V12V_IN = 12 V 83%
V12V_IN = 14 V 81%
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3 Schematic
+
+++
+
Figure 3-1. TPS40074EVM-001 Power Stage/Control Schematic Reference Only, See Table 3 for Specific
Values
Schematic www.ti.com
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3.1 Adjusting Output Voltage (R5 and R6)
The regulated output voltage can be adjusted within a limited range by changing the ground resistor in the
feedback resistor divider (R6 and R5). The output voltage is given by Equation 1.
VVOUT +VVREF R5 )R65 )R3
R5 )R6
(1)
where
• VVREF = 0.700 V
• R3 = 10.0 kΩ
Table 3-1 contains common values for R6 to generate popular output voltages with R5 open R5 can be used to
increase the accuracy that can be obtained without using more expensive resistors. The TPS40074EVM-001 is
stable through these output voltages but the efficiency can suffer as the power stage is optimized for the 1.5-V
output.
Table 3-1. Adjusting V1V5_OUT With R14
VOUT R16
3.3 V(1) 2.67 K
2.5 V(1) 3.83 K
2.2 V(1) 4.64 K
2.0 V(1) 8.36 K
1.8 V 6.34 K
1.5 V 8.66 K
1.2 V 14.0 K
(1) Due to higher duty cycles associated with higher output voltages or lower input voltages, output
current should be limited to 10 A when operating with output voltages greater than 2.0 V or input
voltages below 6 V to reduce conduction losses in the main switching FET (Q1). Under these
conditions, a lower RdsON FET would normally be selected.
3.2 Using Remote Sense (J3)
The TPS40074EVM-001 provides the user with remote sense capabilities through the connector J3. When
remote sense is used, J3 should be connected at the load to provide more accurate load regulation by
compensating for losses over the terminal connections and load wire connections. When remote sense
is connected the output voltage measured between TP15 and TP16 can show a positive load regulation
characteristic (increasing output voltage with increasing load). This is the result of the compensation of the
controller of resistive losses between the local sense voltage (TP15 and TP16) and the remote sense connection
(J3). TP17 and TP18 are connected to the remote sense lines and thus will show the voltage at the load when
remote sense is connected.
Excessive phase shift from inductive components in the load or remote sense connections can cause instability
if care is not taken to minimize these parasitic effects in the remote sense line. A twisted pair of insulated cables
from the load connection to J3 is preferred to minimize noise injection and inductance in the remote sense line.
In a device layout, care should be taken to shield the remote sense line from high-noise, high-current, or digital
signals to limit noise injection into the feedback path and provide the most accurate regulation possible.
3.3 5V Input Operation (R10 and R15)
To operate with a 5-V input, two resistors need to be changed. R10 (RKFF) sets the voltage ramp amplitude and
needs to be reduced to 53.6 kΩ to lower the UVLO to 3.9 V for 5-V operation. In addition, a 330-kΩ resistor
should be added at R15 to prevent an internal race condition during soft start.1
1Due to higher duty cycles associated with higher output voltages or lower input voltages, output current should be limited to 10 A when
operating with output voltages greater than 2.0 V or input voltages below 6 V to reduce conduction losses in the main switching FET
(Q1). Under these conditions, a lower RdsON FET would normally be selected.
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4 Test Setup
4.1 Equipment
4.1.1 Voltage Source
V12V_IN
The input voltage source (V12V_IN) should be a 0-V to 15-V variable DC source capable of 5 ADC. Connect
V12V_IN to J1 as shown in Figure 4-2.
4.1.2 Meters
A1: 0 ADC 5 ADC, ammeter
V1: V12V_IN, 0-Vto 15-V voltmeter
V2: V1V5_OUT 0-V to 5-V voltmeter
4.1.3 Loads
LOAD1
The output load (LOAD1) should be an electronic constant current mode load capable of 0 ADC–15 ADC at 1.5 V.
4.1.4 Recommended Wire Gauge
V12V_IN to J1
The connection between the source voltage, V12V_IN, and J1 of HPA095 can carry as much as 3 ADC. The
minimum recommended wire size is AWG #16 with the total length of wire less than four feet (2-feet input, 2-feet
return).
J2 to LOAD1 (Power)
The power connection between J2 of HPA095 and LOAD1 can carry as much as 15 ADC. The minimum
recommended wire size is 2× AWG #16, with the total length of wire less than four feet (2-feet output, 2-feet
return).
J3 to LOAD1 (Remote Sense)
If remote sense is used, the remote sense connection between J3 of HPA095 and LOAD1 can carry less than 1
ADC. The minimum recommended wire size is AWG #22, with the total length of wire less and four feet (2-feet
output, 2-feet return).
4.1.5 Other
FAN
This evaluation module includes components that can get hot to the touch, because this EVM is not enclosed
to allow probing of circuit nodes, a small fan capable of 200–400 lfm is required to reduce component surface
temperatures to prevent user injury. The EVM should not be left unattended while powered or probed while the
fan is not running.
OSCILLOSCOPE
A 60-MHz or faster oscilloscope can be used to determine the ripple voltage on 1V5_OUT. The oscilloscope
should be set for the following to take output ripple measurements:
• 1-MΩ impedance
• AC coupling
• 1-μs/division horizontal resolution
• 20-mV/division vertical resolution
TP15 and TP16 can be used to measure the output ripple voltage by placing the oscilloscope probe tip through
TP15 and holding the ground barrel to TP16 as shown in Figure 4-2. For a hands-free approach, the loop in
TP16 can be cut and opened to cradle the probe barrel. Using a leaded ground connection can induce additional
noise due to the large ground loop area.
Test Setup www.ti.com
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4.2 Equipment Setup
Figure 4-2 shows the basic recommended test setup to evaluate the TPS40074EVM-001. Note that although the
return for J1 and J2 are the same, the connections should remain separate as shown in Figure 4-1.
4.2.1 Procedure
1. Working at an ESD workstation, make sure that any wrist straps, bootstraps, or mats are connected
referencing the user to earth ground before power is applied to the EVM. An electrostatic smock and safety
glasses should also be worn.
2. Prior to connecting the DC input source, V12V_IN, it is advisable to limit the source current from V12V_IN to
5.0-A maximum. Make sure V12V_IN is initially set to 0 V and connected as shown in Section 4.2.2.
3. Connect the ammeter A1 (0-A to 5-A range) between V12V_IN and J1 as shown in Figure 4-1.
4. Connect voltmeter V1 to TP1 and TP2 as shown in Figure 4-1.
5. Connect LOAD1 to J2 as shown in Figure 3-1. Set LOAD1 to constant current mode to sink 0 ADC before
V12V_IN is applied.
6. Connect voltmeter, V2 across TP17 and TP18 as shown in Figure 4-1.
7. Connect an oscilloscope probe to TP16 and TP15 as shown in Figure 4-2.
8. Place a fan as shown in Figure 4-1. Turn it on, making sure air is flowing across the EVM.
4.2.2 Diagram
LOAD1
1.5V @
15A
-
+
-+
V1
FAN
-1V5_OUT +
+12V_IN -
+-
Oscilloscope
1M!, AC
10mV / div
20MHz
+
+
-
-
A1
V
-
+
12V_IN
TP1 TP2
TP16
TP15
TP5 TP7 TP6
TEXAS INSTRUMENTS
TPS40074EVM-001
12V to 1.5V @ 15A with Remote Sense
HPA095A
J2
J1
V2
+
-
-+
TP18
TP17
GND CHA CHB
See Tip and Barrel
Measurement for
Vout ripple
Figure 4-1. TPS40074EVM-001 Recommended Test Setup
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TP16TP15
Metal Ground Barrel
Probe Tip
Tip and Barrel Vout ripple
measurement
Figure 4-2. Output Ripple Measurement – Tip and Barrel using TP15 and TP16
4.3 Start-Up/Shutdown Procedure
1. Increase V12V_IN (V1) from 0 V to 10 VDC.
2. Vary LOAD1 from 0 A–10 ADC.
3. Vary V12V_IN (V1) from 10 VDC to 14 VDC.
4. Decrease LOAD1 to 0 A.
5. Decrease V12V_IN to 0 V.
4.4 Equipment Shutdown
1. Shut down the oscilloscope.
2. Shut down LOAD1.
3. Shut down V12V_IN.
4. Shut down FAN.
Test Setup www.ti.com
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5 TPS40074EVM Typical Performance Data and Characteristic Curves
Figure 5-1 through Figure 6-2 present typical performance curves for the TPS40074EVM-001. Since actual
performance data can be affected by measurement techniques and environmental variables, these curves are
presented for reference and may differ from actual field measurements.
5.1 Efficiency
TPS40074EVM-001
EFFICIENCY
LOAD CURRENT
vs
70
72
74
76
78
80
82
84
86
88
90
0 2 4 6 8 10 12 14 16
I - Load Current - A
L
Efficiency - %
10
12
14
Revision Tested A
V = 10-14 V,
V = 1.5 V,
I = 0-15 A
12 V_IN
1V5_OUT
1V5_OUT
Figure 5-1. TPS40074EVM-001 Efficiency V12V_IN = 10 V–14 V, V1V5_OUT = 1.5 V, I1V5_OUT = 0 A–15 A
5.2 Line and Load Regulation
TPS40074EVM
LINE AND LOAD REGULATION
1.495
1.5
1.505
1.51
1.515
1.52
1.525
0 2 4 6 8 10 12 14 16
I - Load Current - A
L
V - Output Voltage - V
O
Revision Tested A
14 12
10
Figure 5-2. TPS40074EVM-001 Line and Load Regulation – ±1% Window
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6 EVM Assembly Drawings and Layout
Figure 6-1 through Figure 6-6 show the design of the TPS40074EVM-001 printed circuit board. The EVM
has been designed using a 4-layer, 2-oz copper-clad circuit board 3.0 inch × 3.0 inch with all components
on the top side to allow the user to easily view, probe, and evaluate the TPS40074 control IC in a practical
application. Moving components to both sides of the PCB or using additional internal layers can offer additional
size reduction for space constrained systems.
Figure 6-1. TPS40074EVM-001 Component Placement (Viewed from Top)
Figure 6-2. TPS40074EVM-001 Silkscreen (Viewed from Top)
EVM Assembly Drawings and Layout www.ti.com
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Figure 6-3. TPS40074EVM-001 Top Copper (Viewed from Top)
Figure 6-4. TPS40074EVM-001 Layer 2 (X-Ray View from Top)
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Figure 6-5. TPS40074EVM-001 Layer 3 (X-Ray View from Top)
Figure 6-6. TPS40074EVM-001 Bottom Copper (X-Ray View from Top)
EVM Assembly Drawings and Layout www.ti.com
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7 List of Materials
Table 7-1 lists the EVM components as configured according to the schematic shown in Figure 3-1 and Figure
4-1.
Table 7-1. TPS40074EVM-001 Bill of Materials
Count RefDes Description Size Mfr Part Number
0 C1, C6 Capacitor, 470 μF, 16 V, 21 mΩ, 25% 8mm Panasonic EEUFL1C470U
1 C3 Capacitor, 470 μF, 16 V, 21 mΩ, 25% 8mm Panasonic EEUFL1C470U
1 C2 Capacitor, ceramic, 4700 pF, 50 V, X7R, 10% 0603 Std Std
1 C4 Capacitor, ceramic, 150 pF, 50 V, X7R, 10% 0603 Std Std
1 C5 Capacitor, ceramic, 6800 pF, 50 V, X7R, 10% 0603 Std Std
1 C7 Capacitor, ceramic, 0.047 μF, 50 V, X7R, 10% 0603 Std Std
1 C8 Capacitor, ceramic, 1.5 μF, 16 V, X7R, 20% 0805 TDK C2012X7R1C115M
2 C9, C10 Capacitor, ceramic, 0.1 μF, 50 V, X7R, 20% 0603 Std Std
1 C11 Capacitor, ceramic, 22 pF, 50 V, NPO, 10% 0603 Std Std
1 C12 Capacitor, ceramic, 10 μF, 16 V, X7R, 20% 1206 TDK C3216X7R1C106M
2 C13, C16 Capacitor, ceramic, 2.2 μF, 16 V, X7R, 10% 1206 Std Std
0 C14 Capacitor, ceramic, 2.2 μF, 16 V, X7R, 10% 1206 Std Std
0 C15 Capacitor, ceramic, 1000 pF, 25 V, X7R, 20% 0805 Std Std
2 C17, C18 Capacitor, 1000 μF, 10 V, 16 mΩ, 25% 8mm Panasonic EEUFL1A102U
1 C19 Capacitor, Ceramic, 10 μF, 6.3 V, X5R, 20% 1206 Std Std
1 D1 Diode, Schottky, 200 mA, 30 V SOD323 On-Semi BAT54HT1
1 J1 Terminal Block, 2-pin, 15 A, 5,1 mm 0.40 × 0.35 OST ED1609
1 J2 Terminal Block, 4-pin, 15 A, 5,1 mm 0.80 × 0.35 OST ED2227
1 J3 Terminal Block, 2-pin, 6 A, 3,5 mm 0.27 × 0.25 OST ED1514A
1 L1 Inductor, SMT, 1.3 μH, 26 A, 2 mΩ 0.51 × 0.51 Pulse PG0077.142
1 Q1 Mosfet, N-Ch, 25 V, 81.4 A, 8.9 mΩ LFPAK Philips PH6325L
1 Q2 Mosfet, N-Ch, 25 V, 118 A, 4.1 mΩ LFPAK Philips PH2625L
1 R1 Resistor, Chip, 0-Ω jumper, 1/10-W, 5% 0805 Std Std
1 R2 Resistor, Chip, 680 Ω, 1/16-W, 1% 0603 Std Std
2 R3,R9 Resistor, Chip, 10 kΩ, 1/16-W, 1% 0603 Std Std
1 R4 Resistor, Chip, 6.20 kΩ, 1/16-W, 1% 0603 Std Std
1 R5 Resistor, Chip, 105 kΩ, 1/16-W, 1% 0603 Std Std
1 R6 Resistor, Chip, 9.53 kΩ, 1/16-W, 1% 0603 Std Std
1 R7 Resistor, Chip, 49.9 Ω, 1/16-W, 1% 0603 Std Std
1 R8 Resistor, Chip, 118 kΩ, 1/16-W, 1% 0603 Std Std
1 R10 Resistor, Chip, 133 kΩ, 1/16-W, 1% 0603 Std Std
1 R11 Resistor, Chip, 1.13 kΩ, 1/16-W, 1% 0603 Std Std
0 R12 Resistor, Chip, 3.3 Ω, 1/10-W, 1% 0805 Std Std
2 R13, R14 Resistor, Chip, 10 Ω, 1/16-W, 1% 0603 Std Std
0 R15 Resistor, Chip, Ω, 1/16-W, 1% 0603 N/A N/A
1 R16 Resistor, Chip, 1.0 Ω, 1/16-W, 1% 0603 Std Std
3 TP1, TP15, TP17 Test Point, Red, Thru Hole 0.125 × 0.125 Keystone 5010
8 TP2–TP5, TP10, TP14,
TP16, TP18
Test Point, Black, Thru Hole 0.125 × 0.125 Keystone 5011
7 TP6–TP9, TP11–TP13 Test Point, White, Thru Hole 0.125 × 0.125 Keystone 5012
1 U1* IC QFN-20 TI TPS40074RHL
1 — PCB, 4-Layer FR4, 3.0 inch × 3.0 inch × 0.062 inch 2.4 inch × 2.1
inch
Any HPA095A
4 — Bumpon, Transparent 0.44 inch × 0.2
inch
3M SJ5303
Notes: 1. These assemblies are ESD sensitive, ESD precautions shall be observed.
2. These assemblies must be clean and free from flux and all contaminants. Use of no clean flux is not acceptable.
3. These assemblies must comply with workmanship standards IPC-A-610 Class 2.
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Table 7-1. TPS40074EVM-001 Bill of Materials (continued)
Count RefDes Description Size Mfr Part Number
4. Install Bumpons on back side(unpopulated side) of PCB. Install one in each corner after cleaning.
5. Ref designators marked with an * cannot be substituted. All other components can be substituted with equivalent components of MFG.
8 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision * (June 2006) to Revision A (January 2022) Page
• Updated the numbering format for tables, figures, and cross-references throughout the document. ................2
• Updated the user's guide title............................................................................................................................. 2
Revision History www.ti.com
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STANDARD TERMS FOR EVALUATION MODULES
1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or
documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance
with the terms set forth herein. User's acceptance of the EVM is expressly subject to the following terms.
1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms that accompany such Software
1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.
2Limited Warranty and Related Remedies/Disclaimers:
2.1 These terms do not apply to Software. The warranty, if any, for Software is covered in the applicable Software License
Agreement.
2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for a nonconforming EVM if (a) the nonconformity was caused by
neglect, misuse or mistreatment by an entity other than TI, including improper installation or testing, or for any EVMs that have
been altered or modified in any way by an entity other than TI, (b) the nonconformity resulted from User's design, specifications
or instructions for such EVMs or improper system design, or (c) User has not paid on time. Testing and other quality control
techniques are used to the extent TI deems necessary. TI does not test all parameters of each EVM.
User's claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects in the EVMs within ten (10)
business days after delivery, or of any hidden defects with ten (10) business days after the defect has been detected.
2.3 TI's sole liability shall be at its option to repair or replace EVMs that fail to conform to the warranty set forth above, or credit
User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the warranty
period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to repair or
replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall be
warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.
WARNING
Evaluation Kits are intended solely for use by technically qualified,
professional electronics experts who are familiar with the dangers
and application risks associated with handling electrical mechanical
components, systems, and subsystems.
User shall operate the Evaluation Kit within TI’s recommended
guidelines and any applicable legal or environmental requirements
as well as reasonable and customary safeguards. Failure to set up
and/or operate the Evaluation Kit within TI’s recommended
guidelines may result in personal injury or death or property
damage. Proper set up entails following TI’s instructions for
electrical ratings of interface circuits such as input, output and
electrical loads.
NOTE:
EXPOSURE TO ELECTROSTATIC DISCHARGE (ESD) MAY CAUSE DEGREDATION OR FAILURE OF THE EVALUATION
KIT; TI RECOMMENDS STORAGE OF THE EVALUATION KIT IN A PROTECTIVE ESD BAG.

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2
3Regulatory Notices:
3.1 United States
3.1.1 Notice applicable to EVMs not FCC-Approved:
FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software
associated with the kit to determine whether to incorporate such items in a finished product and software developers to write
software applications for use with the end product. This kit is not a finished product and when assembled may not be resold or
otherwise marketed unless all required FCC equipment authorizations are first obtained. Operation is subject to the condition
that this product not cause harmful interference to licensed radio stations and that this product accept harmful interference.
Unless the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must
operate under the authority of an FCC license holder or must secure an experimental authorization under part 5 of this chapter.
3.1.2 For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:
CAUTION
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.
FCC Interference Statement for Class A EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
FCC Interference Statement for Class B EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
3.2 Canada
3.2.1 For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210 or RSS-247
Concerning EVMs Including Radio Transmitters:
This device complies with Industry Canada license-exempt RSSs. Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.
Concernant les EVMs avec appareils radio:
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concerning EVMs Including Detachable Antennas:
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types
listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated.
Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited
for use with this device.

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3
Concernant les EVMs avec antennes détachables
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
l'émetteur
3.3 Japan
3.3.1 Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に
輸入される評価用キット、ボードについては、次のところをご覧ください。
http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page
3.3.2 Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan may not be certified
by TI as conforming to Technical Regulations of Radio Law of Japan.
If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required to follow the
instructions set forth by Radio Law of Japan, which includes, but is not limited to, the instructions below with respect to EVMs
(which for the avoidance of doubt are stated strictly for convenience and should be verified by User):
1. Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal
Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for
Enforcement of Radio Law of Japan,
2. Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to
EVMs, or
3. Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.
【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて
いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの
措置を取っていただく必要がありますのでご注意ください。
1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用
いただく。
2. 実験局の免許を取得後ご使用いただく。
3. 技術基準適合証明を取得後ご使用いただく。
なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。
上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ
ンスツルメンツ株式会社
東京都新宿区西新宿６丁目２４番１号
西新宿三井ビル
3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧ください。http:/
/www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
3.4 European Union
3.4.1 For EVMs subject to EU Directive 2014/30/EU (Electromagnetic Compatibility Directive):
This is a class A product intended for use in environments other than domestic environments that are connected to a
low-voltage power-supply network that supplies buildings used for domestic purposes. In a domestic environment this
product may cause radio interference in which case the user may be required to take adequate measures.

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4EVM Use Restrictions and Warnings:
4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT
LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling
or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information
related to, for example, temperatures and voltages.
4.3 Safety-Related Warnings and Restrictions:
4.3.1 User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user
guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and
customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input
and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or
property damage. If there are questions concerning performance ratings and specifications, User should contact a TI
field representative prior to connecting interface electronics including input power and intended loads. Any loads applied
outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible
permanent damage to the EVM and/or interface electronics. Please consult the EVM user 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, even with the inputs and outputs kept within the specified allowable ranges, some circuit
components may have elevated case temperatures. These components include but are not limited to linear regulators,
switching transistors, pass transistors, current sense resistors, and heat sinks, which can be identified using the
information in the associated documentation. When working with the EVM, please be aware that the EVM may become
very warm.
4.3.2 EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the
dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.
User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,
affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic
and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely
limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and
liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or
designees.
4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,
state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all
responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and
liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local
requirements.
5. Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate
as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as
accurate, complete, reliable, current, or error-free.
6. Disclaimers:
6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY MATERIALS PROVIDED WITH THE EVM (INCLUDING, BUT NOT
LIMITED TO, REFERENCE DESIGNS AND THE DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL
FAULTS." TI DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT
NOT LIMITED TO ANY EPIDEMIC FAILURE WARRANTY OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADE
SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.
6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS SHALL BE
CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY OTHER INDUSTRIAL OR
INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD PARTY, TO USE THE
EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY INVENTION, DISCOVERY OR
IMPROVEMENT, REGARDLESS OF WHEN MADE, CONCEIVED OR ACQUIRED.
7. USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS
LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS. THIS OBLIGATION SHALL APPLY
WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY OTHER LEGAL
THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.

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5
8. Limitations on Damages and Liability:
8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE,
INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE
TERMS OR THE USE OF THE EVMS , REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED TO, COST OF REMOVAL OR
REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, RETESTING,
OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS, LOSS OF SAVINGS, LOSS OF
USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL BE BROUGHT AGAINST TI
MORE THAN TWELVE (12) MONTHS AFTER THE EVENT THAT GAVE RISE TO THE CAUSE OF ACTION HAS
OCCURRED.
8.2 Specific Limitations. IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY USE OF AN EVM PROVIDED
HEREUNDER, INCLUDING FROM ANY WARRANTY, INDEMITY OR OTHER OBLIGATION ARISING OUT OF OR IN
CONNECTION WITH THESE TERMS, , EXCEED THE TOTAL AMOUNT PAID TO TI BY USER FOR THE PARTICULAR
EVM(S) AT ISSUE DURING THE PRIOR TWELVE (12) MONTHS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE
CLAIMED. THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT.
9. Return Policy. Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s)
will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in
a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable
order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s),
excluding any postage or packaging costs.
10. Governing Law: These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas,
without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to
these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas.
Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief
in any United States or foreign court.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2019, Texas Instruments Incorporated

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IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
PARTY INTELLECTUAL PROPERTY RIGHTS.
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate
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