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4

4

EVM 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.

Summary of Contents for LM5123EVM-BST

Page 1: ...Configurations 7 3 Test Setup and Procedures 8 3 1 Equipment 8 4 Test Results 9 4 1 Efficiency 9 4 2 Load Regulation 10 4 3 Thermal Performance 10 4 4 Start up Waveforms 11 4 5 Steady State Operation 11 4 6 Load Transient Response 12 4 7 Output Voltage Tracking 13 5 PCB Layers 14 6 Schematic 16 7 Bill of Materials 17 8 Revision History 21 List of Figures Figure 1 1 Typical Application Circuit 3 Fi...

Page 2: ... Screen 14 Figure 5 2 Layout Top Layer 14 Figure 5 3 Layout Signal Layer 1 14 Figure 5 4 Layout Signal Layer 2 14 Figure 5 5 Layout Bottom Layer 15 Figure 5 6 Layout Bottom Silk Screen 15 Figure 6 1 Schematic 16 List of Tables Table 2 1 EVM Characteristics 5 Table 2 2 Power Connections 5 Table 2 3 Programmable Jumper Connections 5 Table 2 4 Probe Points 6 Table 7 1 Bill of Materials 17 Trademarks ...

Page 3: ...s supply Automotive HVAC controller supply Automotive motor power supply 1 2 Features The LM5123EVM BST has the following features Input voltage range from 8 V to 18 V Internal low leakage current high impedance feedback resistors with programmable output voltage Operating frequency of 440 kHz with externally clock synchronization up or down by 20 Output voltage tracking using the TRK pin of the L...

Page 4: ...ure 2 1 EVM Photo CAUTION Prolonged operation with low input at full power will cause heating of Q3 and Q2 Board surface is hot Do not touch Contact may cause burns EVM Setup www ti com 4 LM5123EVM BST Evaluation Module SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 5: ... evaluation module Table 2 3 lists the EVM jumpers and test points that configure the LM5123 Q1 as desired These jumpers can set different modes of operation or provide signals to different pins of the LM5123 Q1 Table 2 3 Programmable Jumper Connections Jumper Pins Description Default Connection J7 Pin 1 to Pin 2 SYNC DITHER VH CP is pulled to VCC through a 1 kΩ resistor to enable the internal cha...

Page 6: ...on to be skip TP6 Positive input to the VAUX net TP7 Negative input to the VAUX net TP8 Positive input to the TRK pin of the LM5123 Q1 TP9 Negative input to the TRK pin of the LM5123 Q1 Table 2 4 indicates the dedicated voltage probe points of the EVM These points are used to make measurements on the EVM Table 2 4 Probe Points Sense Point Name Description TP1 VIN Sense point for the positive input...

Page 7: ...ration To dynamically change the output voltage RVREFT and RVEFB are removed and the TRK pin voltage is driven directly to change the output voltage See the data sheet for selecting the voltage range of the LM5123 Q1 and setting the TRK pin voltage to produce the desired output voltage Figure 2 3 shows the configuration to change the output voltage dynamically RSET is R25 in the schematic TRK AGND...

Page 8: ...t Electronic Load Load connected to the output of the evaluation module The electronic load should be able to dissipate 200 W at 24 V Multimeters For DC measurements Voltmeter 1 VIN Capable of measuring the input voltage range up to 18 V Voltmeter 2 VOUT Capable of measuring output voltage of 24 V Ammeter 1 IIN Capable of 30 A DC measurement A shunt resistor may also be used to measure the input c...

Page 9: ...EFF 12V_EFF 10V_EFF 8V_EFF Figure 4 1 Efficiency VOUT 24 V Figure 4 2 shows the efficiency comparison between Skip switching mode and FPWM switching mode at light loading conditions IOUT A Efficiency 0 001 0 021 0 041 0 061 0 081 0 1 0 20 40 60 80 100 SKIP MODE FPWM MODE Figure 4 2 Efficiency VOUT 24 V Light Load www ti com Test Results SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document ...

Page 10: ...3 24 4 VIN 18V VIN 14V VIN 12V VIN 10V VIN 8V Figure 4 3 24 V Load Regulation 4 3 Thermal Performance Figure 4 4 Thermal Performance VIN 8 V VOUT 24 V POUT 200 W No Forced Airflow Test Results www ti com 10 LM5123EVM BST Evaluation Module SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 11: ...igure 4 8 VIN 18 V VOUT 24 V POUT 200 W 4 5 Steady State Operation Full load operation Figure 4 9 through Figure 4 12 show the steady state waveforms of the LM5123EVM BST Figure 4 9 VIN 8 V VOUT 24 V POUT 200 W Figure 4 10 VIN 10 V VOUT 24 V POUT 200 W www ti com Test Results SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback LM5123EVM BST Evaluation Module 11 Copyright 2021 Tex...

Page 12: ...ient response of the evaluation module Figure 4 13 VIN 8 V IOUT 4 A to 8 A Figure 4 14 VIN 10 V IOUT 4 A to 8 A Figure 4 15 VIN 14 V IOUT 4 A to 8 A Figure 4 16 VIN 18 V IOUT 4 A to 8 A Test Results www ti com 12 LM5123EVM BST Evaluation Module SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 13: ...eplicate these waveforms see Section 2 3 1 Figure 4 17 Triangle Voltage Tracking VIN 14 V POUT 200 W VOUT 14 V to 33 V Figure 4 18 Sine Voltage Tracking VIN 14 V POUT 200 W VOUT 14 V to 33 V www ti com Test Results SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback LM5123EVM BST Evaluation Module 13 Copyright 2021 Texas Instruments Incorporated ...

Page 14: ...yout Top Silk Screen Figure 5 2 Layout Top Layer Figure 5 3 Layout Signal Layer 1 Figure 5 4 Layout Signal Layer 2 PCB Layers www ti com 14 LM5123EVM BST Evaluation Module SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 15: ...ottom Layer Figure 5 6 Layout Bottom Silk Screen www ti com PCB Layers SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback LM5123EVM BST Evaluation Module 15 Copyright 2021 Texas Instruments Incorporated ...

Page 16: ... illustrates the EVM schematic Figure 6 1 Schematic Schematic www ti com 16 LM5123EVM BST Evaluation Module SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 17: ...2ER71H106KA12L MuRata C19 C20 C21 C22 C23 C35 C36 7 0 1uF CAP CERM 0 1 uF 100 V 10 X7R AEC Q200 Grade 1 0603 603 GCJ188R72A104KA01D MuRata C20 C21 C22 3 4 7uF CAP CERM 4 7 uF 100 V 10 X7S AEC Q200 Grade 1 1210 1210 CGA6M3X7S2A475K200AB TDK C24 C25 C26 C33 4 4 7uF CAP CERM 4 7 uF 100 V 10 X7S AEC Q200 Grade 1 1210 1210 CGA6M3X7S2A475K200AB TDK C27 1 100pF CAP CERM 100 pF 50 V 5 C0G NP0 AEC Q200 Gra...

Page 18: ...Wurth Elektronik J8 1 Header 100mil 7x1 Gold TH 7x1 Header TSW 107 07 G S Samtec J9 J10 J11 3 Header 2 54 mm 2x1 Gold TH Header 2 54mm 2x1 TH 61300211121 Wurth Elektronik L1 1 2 6uH Inductor Shielded Drum Core WE Superflux200 2 6 uH 31 5 A 0 0016 ohm SMD 18 3x8 9x18 2mm 7443556260 Wurth Elektronik Q1 Q2 Q3 Q4 4 60V MOSFET N CH 60 V 71 A SO 8FL SO 8FL NTMFS5C670NLT1G ON Semiconductor R2 R3 2 0 003 ...

Page 19: ...st Point Miniature SMT Testpoint_Keystone_Miniature 5015 Keystone TP4 TP5 TP7 TP9 4 Test Point Miniature Black TH Black Miniature Testpoint 5001 Keystone U1 1 2 2 MHz Wide VIN Low IQ Synchronous Boost Controller with Tracking VQFN20 LM5123QRGRRQ1 Texas Instruments C1 0 2200pF CAP CERM 2200 pF 100 V 10 X7R 0603 603 GRM188R72A222KA01D MuRata C28 C29 0 0 1uF CAP CERM 0 1 uF 100 V 10 X7R AEC Q200 Grad...

Page 20: ... 80 6k RES 80 6 k 1 0 1 W AEC Q200 Grade 0 0603 603 CRCW060380K6FKEA Vishay Dale R25 0 24 9k RES 24 9 k 0 1 0 1 W 0603 603 RT0603BRD0724K9L Yageo America Schematic www ti com 20 LM5123EVM BST Evaluation Module SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 21: ...ision December 2020 to Revision A December 2021 Page Updated text to match the proper rating of the EVM 3 Updated images throughout the user s guide 3 www ti com Revision History SNVU737A DECEMBER 2020 REVISED DECEMBER 2021 Submit Document Feedback LM5123EVM BST Evaluation Module 21 Copyright 2021 Texas Instruments Incorporated ...

Page 22: ...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...

Page 23: ... 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...

Page 24: ...y 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 R...

Page 25: ... 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...

Page 26: ...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...

Page 27: ...o change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you will fully indemn...

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