Texas Instruments TPS40345EVM-353 User manual

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TPS40345EVM-353 Evaluation Module
User's Guide
SNVU588–November 2017
TPS40345EVM-353 Evaluation Module
The TPS40345EVM-353 evaluation module (EVM) is a synchronous buck converter providing a fixed
1.2-V output at up to 20 A from a 12-V input bus. The EVM is designed to start-up from a single supply,
which means no additional bias voltage is required for start-up. The module uses the TPS40345 high-
performance, mid-input voltage synchronous buck controller and TI’s NexFET™ high performance
MOSFETs.
Contents
1 Description.................................................................................................................... 3
1.1 Applications.......................................................................................................... 3
1.2 Features.............................................................................................................. 3
2 TPS40345EVM-353 Electrical Performance Specifications............................................................ 3
3 TPS40345EVM-353 Schematic............................................................................................ 4
4 Connector and Test Point Descriptions................................................................................... 5
4.1 Enable Jumper (JP2)............................................................................................... 5
4.2 Frequency Spread Spectrum – FSS Jumper (JP1) ............................................................ 5
4.3 Test Point Descriptions ............................................................................................ 5
5 Test Setup .................................................................................................................... 7
5.1 Equipment ........................................................................................................... 7
5.2 Equipment Setup.................................................................................................... 7
5.3 Start-Up/Shutdown Procedure .................................................................................... 9
5.4 Output Ripple Voltage Measurement Procedure ............................................................... 9
5.5 Control Loop Gain and Phase Measurement Procedure...................................................... 9
5.6 Equipment Shutdown............................................................................................. 10
6 TPS40345EVM-353 Test Data ........................................................................................... 10
6.1 Efficiency ........................................................................................................... 10
6.2 Line and Load Regulation........................................................................................ 11
6.3 Output Voltage Ripple ............................................................................................ 11
6.4 Switch Node........................................................................................................ 12
6.5 Control Loop Bode Diagram ..................................................................................... 12
6.6 Additional Waveforms ............................................................................................ 13
7 TPS40345EVM-353 Assembly Drawings and Layout................................................................. 13
8 TPS40345EVM-353 Bill of Materials..................................................................................... 17
List of Figures
1 TPS40345EVM-353 Schematic............................................................................................ 4
2 TPS40345EVM-353 Recommended Test Set-Up....................................................................... 8
3 Output Ripple Measurement – Tip and Barrel using TP3 and TP4................................................... 8
4 Control Loop Measurement Setup......................................................................................... 9
5 TPS40345EVM-353 Efficiency vs Load Current ....................................................................... 10
6 TPS40345EVM-353 Output Voltage vs Load Current................................................................. 11
7 TPS40345EVM-353 Output Voltage Ripple ............................................................................ 11
8 TPS40345EVM-353 Switching Waveforms............................................................................. 12
9 TPS40345EVM-353 Gain and Phase vs Frequency .................................................................. 12
10 TPS40345EVM-353 Output Ripple With FSS Enabled ............................................................... 13
11 TPS40345EVM-353 Component Placement (Top View) ............................................................. 14

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12 TPS40345EVM-353 Silk Screen (Top View) ........................................................................... 14
13 TPS40345EVM-353 Top Copper (Top View)........................................................................... 15
14 TPS40345EVM-353 Bottom Copper (Top View)....................................................................... 15
15 TPS40345EVM-353 Internal 1 (X-Ray Top View) ..................................................................... 16
16 TPS40345EVM-353 Internal 2 (X-Ray Top View) ..................................................................... 16
List of Tables
1 TPS40345EVM-353 Electrical and Performance Specifications ...................................................... 3
2 Test Point Descriptions ..................................................................................................... 5
3 TPS40345EVM-353 Bill of Materials..................................................................................... 17
Trademarks
NexFET is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.

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TPS40345EVM-353 Evaluation Module
1 Description
The TPS40345EVM-353 is designed to use a regulated 12 V (8 V – 14 V) bus voltage to provide a
regulated 1.2-V output at up to 20 A of load current. The TPS40345EVM-353 is designed to demonstrate
the TPS40345 controller and TI NexFETs in a typical 12-V bus to low-voltage application while providing a
number of non-invasive test points to evaluate the performance of the TPS40345 and TI NexFETs in a
given application.
1.1 Applications
• High-current, low-voltage FPGA or microcontroller core supplies
• High-current point of load modules
• Telecommunications equipment
• Computer peripherals
1.2 Features
• 8-V to 14-V input voltage rating
• 1.2-V ± 2% output voltage rating
• 20-A steady state load current
• 600-kHz switching frequency
• Simple access to IC features including power good, enable, soft start, and error amplifier
• Convenient test points for simple, non-invasive measurements of converter performance
2 TPS40345EVM-353 Electrical Performance Specifications
Table 1. TPS40345EVM-353 Electrical and Performance Specifications
PARAMETER NOTES AND CONDITIONS MIN TYP MAX UNIT
INPUTS CHARACTERISTICS
VIN Input voltage 8 12 14 V
IIN Input current VIN = Nom, IOUT = Max 2.3 2.5 A
No load input current VIN = Nom, IOUT = 0A 40 50 mA
VIN_UVLO Input UVLO IOUT = 10 A 3.0 V
OUTPUTS CHARACTERISTICS
VOUT1 Output voltage 1 VIN = 12 V, IOUT = 20 A 1.17 1.2 1.23 V
Line regulation VIN = 8 V to 14 V 0.5%
Load regulation IOUT = 0 A to 20 A 0.5%
VOUT_ripple Output voltage ripple VIN = 12 V, IOUT = 20 A 24 mVpp
IOUT1 Output current 1 VIN = 8 V to 14 V 0 20 A
SYSTEMS CHARACTERISTICS
fSW Switching frequency 540 600 660 kHz
ηpk Peak efficiency VIN = 12 V 88%
ηFull load efficiency VIN = 12 V, IOUT = 20 A 86%

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3 TPS40345EVM-353 Schematic
For reference only, See Table 3 for specific values
Figure 1. TPS40345EVM-353 Schematic

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4 Connector and Test Point Descriptions
4.1 Enable Jumper (JP2)
The TPS40345EVM-353 is designed with a Disable Jumper (JP2) using a 0.1-inch spacing header and
shunt. Installing a shunt in the JP2 position connects the EN/SS pin to GND, discharges the soft-start
capacitor, and disables the TPS40304 controller. This forces the output into a high-impedance state
(approximately 20kΩto GND).
4.2 Frequency Spread Spectrum – FSS Jumper (JP1)
The TPS40345EVM-353 is designed with a frequency spread spectrum (FSS) enable jumper (JP1) using
a 0.1" spacing header and shunt. Installing a shunt in the JP1 position connects the EN/SS pin to BP via a
267-kΩresistor (R10) to enable frequency spread spectrum.
FSS modulates the switching frequency to ±10% of the nominal value at 30 kHz to reduce EMI at the
switching frequency and its harmonics, however there may be a 30-kHz component to the output ripple
(see Figure 10).
The TPS40345EVM-353 does not dynamically monitor the JP1 status for programming FSS. The
TPS40345EVM-353 must be disabled via JP2 or powered down by reducing VIN to less than 3 V to
remove or install JP1.
4.3 Test Point Descriptions
Table 2. Test Point Descriptions
TEST
POINT LABEL USE SECTION
TP1 VIN Measurement test point for input voltage 4.3.1
TP2 GND Ground test point for input voltage 4.3.1
TP3 VOUT Measurement test point for output voltage 4.3.1
TP4 GND Ground test point for output voltage 4.3.2
TP5 CHB Measurement test point for channel B of loop response 4.3.3
TP6 SGND Ground test point for channel B of loop response 4.3.3
TP7 CHA Measurement test point for channel A of loop response 4.3.3
TP8 SGND Ground test point for channel A of loop response 4.3.3
TP9 SGND Ground test point for error amplifier measurements 4.3.4
TP10 COMP Measurement test point for error amplifier output voltage 4.3.4
TP11 FB Measurement test point for error amplifier input voltage 4.3.4
TP12 HDRV Measurement test point for high-side gate driver voltage 4.3.5
TP13 SW Measurement test point for switching node voltage 4.3.5
TP14 LDRV Measurement test point for low-side gate driver voltage 4.3.5
TP15 PGND Ground test point for switch node and gate drive voltages 4.3.5
TP16 PGOOD Measurement test point for power good 4.3.6
TP17 EN/SS Measurement test point for enable / soft start 4.3.7
TP18 SGND Ground test point for power good and enable / soft start 4.3.6 and 4.3.7

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4.3.1 Input Voltage Monitoring (TP1 and TP2)
The TPS40345EVM-353 provides two test points for measuring the input voltage applied to the module.
This allows the user to measure the actual input module voltage without losses from input cables and
connectors. All input voltage measurements should be made between TP1 and TP2. To use TP1 and
TP2, connect a voltmeter positive input to TP1 and input terminal to TP2.
4.3.2 Output Voltage Monitoring (TP3 and TP4)
The TPS40345EVM-353 provides two test points for measuring the output voltage generated by the
module. This allows the user to measure the actual module output voltage without losses from input
cables and connectors. All input voltage measurements should be made between TP3 and TP4. To use
TP3 and TP4, connect a voltmeter positive input to TP3 and negative input to TP4.
4.3.3 Loop Response Testing (TP5, TP6, TP7, TP8, and R3)
The TPS40345EVM-353 provides four test points (2 signal and 2 ground) for measuring the control loop
frequency response. This allows the user to measure the actual module loop response without modifying
the evaluation board. A transformer isolated signal up to 30 mV can be injected between TP5 and TP7.
The injected signal amplitude can be measured by the ac coupled amplitude at CHA (TP7) and the
resulting output voltage deviation can be measured at CHB (TP5). See Figure 4 for additional detail.
4.3.4 Error Amplifier Voltage Monitoring (TP9, TP10, and TP11)
The TPS40345EVM-353 provides three test points for measuring the error amplifier input and output
voltages. This allows the user to directly measure the feedback and control voltages of the TPS40304
controller. The control voltage (TP10) can also be used to measure the control to output or power-stage
frequency response or output to control or error amplifier frequency response. See Section 5.5 for
additional details.
4.3.5 Switching Waveform Monitoring (TP12, TP13, TP14, and TP15)
The TPS40345EVM-353 provides three test points and a local power ground for measuring the switching
waveforms of the module power stage. This allows the user to monitor actual switching waveforms during
operation. TP13 is a 0.040-inch square pad of exposed PCB copper to minimize EMI radiation from the
high transient voltages on the switch node. Switching waveform measurements should be made using
power ground (TP15) as the ground reference for more accurate measurements.
4.3.6 Power-Good Voltage Monitoring (TP16 and TP18)
The TPS40345EVM-353 provides a test point and local ground for measuring the power good output
voltage. A 100-kΩresistor pullup to BP (R9) is included to allow the power-good signal to be monitored
without requiring an external pull-up. For true open-drain operation with no pullup, remove R9. With R9
removed, TP16 can be connected to TP17 of another TPS40345EVM-353 to provide sequential start-up of
the two TPS40345EVM-353 converters.
4.3.7 Enable and Soft-Start Voltage Monitoring (TP17 and TP18)
The TPS40345EVM-353 provides a test point and local ground for measuring the enable and soft-start
voltage. TP17 and TP18 or JP2 can be used to provide an external enable signal. Due to the nature of the
soft-start function, the external signal must be open-collector or open-drain without pullup.

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5 Test Setup
5.1 Equipment
5.1.1 Voltage Source
VIN — The input voltage source (VIN) must be a 0-V to 15-V variable DC source capable of supplying 5
Adc.
5.1.2 Meters
A1: — Input current meter. 0 Adc – 5 Adc ammeter
V1: — Input voltage meter. 0 V – 15 V voltmeter
V2: — Output voltage meter. 0 V – 2 V voltmeter
5.1.3 Load
LOAD1: — Output load. Electronic load set for constant current or constant resistance capable of 0 Adc –
20 Adc at 1.2-Vdc.
5.1.4 Oscilloscope
For output voltage ripple: — Oscilloscope must be an analog or digital oscilloscope set for ac-coupled
measurement with 20-MHz bandwidth limiting. Use 20 mV/division vertical resolution, 1-µs/division
horizontal resolution.
For switching waveforms: — Oscilloscope shall be an analog or digital oscilloscope set for dc coupled
measurement with 20-MHz bandwidth limiting. Use 2 V/division or 5V/division vertical resolution and 1-
µs/division horizontal resolution.
5.1.5 Recommended Wire Gauge
VIN to J1: — The connection between the source voltage (VIN) and J1 of TPS40345EVM-353 can carry as
much as 3.5 Adc of current. The minimum recommended wire size is AWG #16 with the total length of
wire less than 2 feet (1 foot input, 1 foot return).
J2 to LOAD1: — The connection between the source voltage (VIN) and J1 of TPS40345EVM-353 can
carry as much as 20 Adc of current. The minimum recommended wire size is AWG #12 with the total
length of wire less than 2 feet (1 foot input, 1 foot return).
5.1.6 Other
FAN: — The TPS40345EVM-353 evaluation module includes components that can get hot to the touch
when operating. Because this evaluation module is not enclosed to allow probing of circuit nodes, TI
recommends a small fan capable of 200 lfm – 400 lfm to reduce component temperatures when operating.
5.2 Equipment Setup
Shown in Figure 2 is the basic test set up recommended to evaluate the TPS40345EVM-353. Note that
although the return for J1 and JP2 are the same system ground, the connections should remain separate
as shown in Figure 2.
5.2.1 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. Electrostatic smock and
safety glasses should also be worn.
2. Prior to connecting the dc input source, VIN, it is advisable to limit the source current from VIN to 4 A,
maximum. Make sure VIN is initially set to 0 V and connected as shown in Figure 2.
3. Connect VIN to J1 as shown in Figure 2.

TP4TP3
Metal Ground Barrel
Probe Tip
Tip and Barrel Vout ripple
measurement
LOAD1
1.2V @
20A
+
-
FAN
V2
-
+
See Tip and Barrel
Measurement for
Vout ripple
V1
+
-
A1
-
+
VIN
Oscilloscope
1MW, AC
20mV / div
20MHz
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4. Connect ammeter A1 between VIN and J1 as shown in Figure 2.
5. Connect voltmeter V1 to TP1 and TP2 as shown in Figure 2.
6. Connect voltmeter V2 to TP3 and TP4 as shown in Figure 2.
7. Connect oscilloscope probes to desired test points per Table 2.
8. Place fan as shown in Figure 2 and turn on making sure to blow air directly across the evaluation
module.
5.2.2 Diagram
Figure 2. TPS40345EVM-353 Recommended Test Set-Up
Figure 3. Output Ripple Measurement – Tip and Barrel using TP3 and TP4

Network
Analyzer
Isolation
Transformer
LOAD1
1.2V @
20A
+
-
V2
-
+
See Tip and Barrel
Measurement for
Vout ripple
V1
+
-
A1
-
+
VIN
Oscilloscope
1MW, AC
20mV / div
20MHz
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Figure 4. Control Loop Measurement Setup
5.3 Start-Up/Shutdown Procedure
1. Verify shunt position for JP1 for desired FSS status per _________(need correct reference).
2. Remove shunt from JP2 location if present.
3. Increase VIN from 0 Vdc to 12 Vdc.
4. Vary LOAD1 from 0 Adc to 20 Adc.
5. Vary VIN from 8 V to 14 V.
6. Decrease VIN to 0 V.
7. Decrease LOAD1 to 0 A.
5.4 Output Ripple Voltage Measurement Procedure
1. Follow Section 5.3 steps 1 – 5 to set VIN and LOAD1 to the desired operating condition.
2. Connect oscilloscope probe with exposed metal barrel to TP3 and TP4 per Figure 3.
3. Set oscilloscope per oscilloscope for output voltage ripple measurement in Section 5.1.4.
4. Follow Section 5.3 steps 6 and 7 to power down.
5.5 Control Loop Gain and Phase Measurement Procedure
1. Follow Section 5.3 steps 1 – 5 to set VIN and LOAD1 to the desired operating condition:
a. If JP1 is installed (FSS enabled), loop response data about the modulation frequency (30 kHz)
may be affected.
2. Connect a 1-kHz – 1-MHz isolation transformer to TP5 and TP7 as shown in Figure 4.

0 5 10 15 20
I - Load Current - A
L
8 V 12 V
14 V
60
65
70
75
80
85
90
95
h- Efficiency - %
Channel B
20 LOG
Channel A
æ ö
´ç ÷
è ø
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3. Connect input signal amplitude measurement probe (channel A) to TP7 as shown in Figure 4.
4. Connect output signal amplitude measurement probe (channel B) to TP5 as shown in Figure 4.
5. Connect ground lead of channel A and channel B to TP6 and TP8 as shown in Figure 4.
6. Inject 30 mV or less signal across R3 through isolation transformer.
7. Sweep frequency from 1 kHz to 1 MHz with 10-Hz or lower post filter.
8. Control loop gain can be measured by
9. Control loop phase can be measured by the phase difference between channel A and channel B.
10. Control to output response (power stage transfer function) can be measured by connecting channel A
probe to TP10 (COMP) and channel B probe to TP5 (CHB).
11. Output to control response (compensated error amplifier transfer function) can be measured by
connecting channel A probe to TP7 (CHA) and channel B probe to TP10 (COMP).
12. Follow Section 5.3 steps 6 and 7 to power down.
5.6 Equipment Shutdown
1. Shut down oscilloscope
2. Shut down LOAD1
3. Shut down VIN
4. Shut down fan
6 TPS40345EVM-353 Test Data
Figure 5 through Figure 10 present typical performance curves for the TPS40345EVM-353. 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.
6.1 Efficiency
VIN = 8.0V – 14V, VOUT = 1.2V, IOUT = 0A – 20A
Figure 5. TPS40345EVM-353 Efficiency vs Load Current

Vin = 14V, Vout = 1.2 V, Iout = 20 A
Output Ripple
1.188
1.191
1.194
1.197
1.2
1.203
1.206
1.209
1.212
0 5 10 15 20 25
V - Output Voltage - V
O
I - Load Current - A
L
8 V
12 V
14 V
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6.2 Line and Load Regulation
VIN = 8.0V – 14V, VOUT = 1.2V, IOUT = 0A – 20A
Figure 6. TPS40345EVM-353 Output Voltage vs Load Current
6.3 Output Voltage Ripple
VIN = 14V, VOUT = 1.2V, IOUT = 20A
Figure 7. TPS40345EVM-353 Output Voltage Ripple

-60
-40
-20
0
20
40
60
80
100
0.1 1 10 100 1000
f - Frequency - kHz
-135
-90
-45
0
45
90
135
180
225
Gain
Phase
Gain - dB
Vin = 14V, Vout = 1.2 V, Iout = 20 A
Switching
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6.4 Switch Node
VIN = 12V, VOUT = 1.2V, IOUT = 20 A
Ch1: TP12 (HDRV), Ch2:13 TP (SW), Ch3: TP14 (LDRV)
Figure 8. TPS40345EVM-353 Switching Waveforms
6.5 Control Loop Bode Diagram
VIN = 14V, VOUT = 1.2V, IOUT = 20A, Bandwidth: 73kHz, Phase Margin: 47°
Figure 9. TPS40345EVM-353 Gain and Phase vs Frequency

Vin = 14V, Vout = 1.2 V, Iout = 20 A
Output Ripple
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6.6 Additional Waveforms
6.6.1 Output Ripple With Frequency Spread Spectrum (FSS) Enabled
FSS varies the output switching frequency. This change in switching frequency can produce a small
change in the output voltage at the modulation frequency. Figure 10 shows the approximately 10-mV
modulation of the output voltage generated when FSS is enabled.
Figure 10. TPS40345EVM-353 Output Ripple With FSS Enabled
7 TPS40345EVM-353 Assembly Drawings and Layout
The following figures (Figure 11 through Figure 16) show the design of the TPS40345EVM-353 printed
circuit board. The EVM has been designed using a 4-layer, 2-oz. copper-clad circuit board 3-inch × 3-inch
with all components on the top to allow the user to easily view, probe, and evaluate the TPSxxxxx control
IC in a practical double-sided application. Moving components to both sides of the PCB or using additional
internal layers can offer additional size reduction for space constrained systems.

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Figure 11. TPS40345EVM-353 Component Placement (Top View)
Figure 12. TPS40345EVM-353 Silk Screen (Top View)

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Figure 13. TPS40345EVM-353 Top Copper (Top View)
Figure 14. TPS40345EVM-353 Bottom Copper (Top View)

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Figure 15. TPS40345EVM-353 Internal 1 (X-Ray Top View)
Figure 16. TPS40345EVM-353 Internal 2 (X-Ray Top View)

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8 TPS40345EVM-353 Bill of Materials
Table 3. TPS40345EVM-353 Bill of Materials
QTY RefDes Value Description Size Part Number MFR
2 C1, C2 10µF Capacitor, Ceramic, 25V, X7R, 10% 1210 Std Std
1 C11 4.7µF Capacitor, Ceramic, 10V, X7R, 20% 0805 Std Std
1 C12 1µF Capacitor, Ceramic, 25V, X7R, 20% 0805 Std Std
0 C13 1nF Capacitor, Ceramic, 25V, X5R, 20% 0603 Std Std
1 C14 3.3nF Capacitor, Ceramic, 16V, X7R, 20% 0603 Std Std
1 C3 330µF Capacitor, Aluminum, 25V, ±20%, 160mΩ0.328 x 0.390 inch EEEFK1E331P Panasonic
2 C4, C6 680pF Capacitor, Ceramic, 25V, COG, 10% 0603 Std Std
1 C5 100pF Capacitor, Ceramic, 25V, COG, 10% 0603 Std Std
1 C7 100nF Capacitor, Ceramic, 16V, X7R, 20% 0603 Std Std
1 C8 220µF Capacitor, POSCAP, 6.3V, 25mΩ, 105C, 20% 7343(D) 6TPE220M Sanyo
2 C9, C10 47µF Capacitor, Ceramic, 6.3V, X5R, 20% 1210 Std Std
2 J1, J2 ED120/2DS Terminal Block, 2-pin, 15A, 5.1mm 0.40 x 0.35 inch ED120/2DS OST
2 JP1, JP2 PEC02SAAN Header, 2-pin, 100mil spacing 0.100 inch x 2 PEC02SAAN Sullins
1 L1 0.38µH Inductor, SMT, 35A 0.512 x 0.571 inch PG0077.401NLT Pulse
1 Q1* CSD16410Q5A MOSFET, N-Chan, 25V, 59A, 9.6mΩQFN-8 POWER CSD16410Q5A TI
1 Q2* CSD16321Q5 MOSFET, N-Chan, 25V, 31A QFN-8 POWER CSD16321Q5 TI
3 R1, R4, R6 10.0kΩResistor, Chip, 1/16W, 1% 0603 Std Std
1 R10 267kΩResistor, Chip, 1/16W, 1% 0603 Std Std
1 R2 1.50kΩResistor, Chip, 1/16W, 1% 0603 Std Std
1 R3 49.9ΩResistor, Chip, 1/16W, 1% 0603 Std Std
1 R5 2ΩResistor, Chip, 1/16W, 1% 0603 Std Std
0 R7 2.2ΩResistor, Chip, 1/8W, 5% 1206 Std Std
1 R8 4.02kΩResistor, Chip, 1/16W, 1% 0603 Std Std
1 R9 100kΩResistor, Chip, 1/16W, 1% 0603 Std Std
2 TP1, TP3 5000 Test Point, Red, Thru Hole Color Keyed 0.100 x 0.100 inch 5000 Keystone
0 TP13 N/A Test Point, SM, 2x3mm 0.118 x 0.079 inch
6 TP2, TP4, TP6,
TP8, TP15, TP18 5001 Test Point, Black, Thru Hole Color Keyed 0.100 x 0.100 inch 5001 Keystone
9 TP5, TP7,
TP9–TP12, TP14,
TP16, TP17
5002 Test Point, White, Thru Hole Color Keyed 0.100 x 0.100 inch 5002 Keystone
1 U1* TPS40345DRC IC, 3V – 20V sync. Buck controller/Enable Light Load/Fq
Spread Spectrum DRC10 TPS40345DRC TI
2 – Shunt, 100-mil, Black 0.1 929950-00 3M
1 – PCB, 2.5 In x 2.5 In x 0.062 In HPA353 Any

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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 components or circuit boards. This evaluation board/kit does
not 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 from
the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY 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 claims
arising 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 all
appropriate 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 ANY
INDIRECT, 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 or
services 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. This
notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or
safety 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, or
combination 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 PURPOSES
ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio
frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are
designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may
be required to correct this interference.
EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of and the output voltage range of .
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 . The EVM is designed to operate properly
with certain components above 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.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2017, Texas Instruments Incorporated

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.
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.
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.