TPS62743EVM-689

User's Guide SLVUAF5A – June 2015 – Revised January 2016 TPS62743EVM-689 Evaluation Module This user’s guide describes the characteristics, operation, and use of the Texas Instruments TPS62743 evaluation module (EVM). This EVM is designed to help the user easily evaluate and test the operation and functionality of the TPS62743. The EVM converts a 2.0-V to 5.5-V input voltage to a regulated output voltage that is set between 1.2 V and 3.3 V at up to 300 mA. The TPS62743 has an ultra-low quiescent current of 360 nA. This user’s guide includes setup instructions for the hardware, a printed-circuit board layout for the EVM, a schematic diagram, a bill of materials, and test results for the EVM. 1 2 3 4 5 Contents Introduction ................................................................................................................... Setup .......................................................................................................................... Common Efficiency Measurement Errors with Ultra-Low Iq Devices ................................................. Board Layout ................................................................................................................. Schematic and Bill of Materials ............................................................................................ 2 3 4 5 8 List of Figures 1 Assembly Layer .............................................................................................................. 5 2 Top Layer ..................................................................................................................... 6 3 Bottom Layer ................................................................................................................. 7 4 TPS62743EVM-689 Schematic ............................................................................................ 8 List of Tables 1 Output Voltage Settings ..................................................................................................... 3 2 TPS62743EVM-689 Bill of Materials ...................................................................................... 9 SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback TPS62743EVM-689 Evaluation Module Copyright © 2015–2016, Texas Instruments Incorporated 1 Introduction 1 www.ti.com Introduction The TPS62743 is a 300-mA, synchronous, step-down converter in a tiny 1.6 x 0.9-mm, 8-ball DSBGA package. The output voltage is fixed inside the device by the connection of the three VSELx pins. 1.1 Background The TPS62743EVM-689 uses the TPS62743 device. The EVM operates with full-rated performance with an input voltage between 2.0 V and 5.5 V. 2 TPS62743EVM-689 Evaluation Module SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated Setup www.ti.com 2 Setup This section describes how to properly use the TPS62743EVM-689. 2.1 Input/Output Connector Descriptions J1, Pin 1&2 – VIN, J1, Pin 3&4 – S+/S– J1, Pin 5&6 – GND J2, Pin 1&2 – VOUT J2, Pin 3&4 – S+/S– J2, Pin 5&6 – GND J3 – SW/GND JP1 – EN JP2 – VHIGH JP3 through JP5 – VSELx Positive input connection from the input supply for the EVM. Input voltage sense connections. Measure the input voltage at this point. Return connection from the input supply for the EVM. Output voltage connection. Output voltage sense connections. Measure the output voltage at this point. Output return connection. Switch node measurement connection EN pin input jumper. Place the supplied jumper across ON and EN to turn on the IC. Place the jumper across OFF and EN to turn off the IC. HIGH Level Selection Jumper. The setting high level can be chosen from either VIN or VOUT These four inputs set the output voltage. By connecting each pin high or low, the output voltage is programmed per Table 1. Do not leave any jumper open for proper operation. Table 1 provides the output voltage settings for the TPS62743EVM-689. A 0 refers to logic low, while 1 refers to logic high. Table 1. Output Voltage Settings 2.2 VOUT VSEL 3 VSEL 2 VSEL 1 1.2 0 0 0 1.5 0 0 1 2.8 0 1 0 2.1 0 1 1 2.5 1 0 0 2.8 1 0 1 3.0 1 1 0 3.3 1 1 1 Operation To operate the EVM, set jumpers JP1 through JP5 to the desired positions per Section 2.1. Connect the input supply to J1 and connect the load to J2. SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback TPS62743EVM-689 Evaluation Module Copyright © 2015–2016, Texas Instruments Incorporated 3 Common Efficiency Measurement Errors with Ultra-Low Iq Devices 3 www.ti.com Common Efficiency Measurement Errors with Ultra-Low Iq Devices Efficiency is a common measurement for a power supply. With an ultra-low quiescent current device, such as the TPS62743, measurement errors can have a large impact on the measured efficiency, especially at very low load currents (< 100 µA). 3.1 Efficiency Measurement Setup To accurately measure the efficiency of the TPS62743EVM-689, use the setup described in SLVA236 Figure 6. The 'Additional Input Capacitor' referred to in that application report is not needed as C5 is already included on the TPS62743EVM-689. Any additional input capacitance is not recommended as it incurs increased leakage on the input which lowers the measured efficiency. When measuring efficiency through the setup in SLVA236, special care must be taken to remove the current consumed by the measurement instruments from the efficiency calculations. Such measurement instruments typically include the input voltage and output voltage multimeters as well as the input power supply's remote sense lines (if it has this capability). The current into these points affects the measured efficiency at very light loads. Two possible methods to overcome this are: measuring the current into these points (measure the current into the multimeters and/or remote sense lines) and then subtracting this current from the efficiency calculation or simply removing these instruments from the test setup. At very light load currents, it is typically best to remove the remote sense lines of the input power supply and then measure the current into the input and output voltage multimeters to get the most accurate efficiency measurement. 3.2 Pullup and Pulldown Resistors In addition to the input capacitor and remote sense lines noted in Section 3.1, any pullup or pulldown resistors can draw significant current and affect the measured efficiency. For example, if the VSEL2 pin were pulled up to the input voltage with a 1-MΩ resistor and the pin were tied low through JP4, this would draw an extra 3.6 µA from the input source at a 3.6-V input voltage. This would greatly affect the efficiency at very light loads. For this reason, no pullup or pulldown resistors have been used on the TPS62743EVM689. The final application circuit should ensure that all digital inputs to the TPS62743 are terminated either high or low and not left floating, per the device data sheet. 4 TPS62743EVM-689 Evaluation Module SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated Board Layout www.ti.com 4 Board Layout This section provides the TPS62743EVM-689 board layout and illustrations. The gerbers are available on the EVM product page: TPS62743EVM-689. Figure 1. Assembly Layer SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback TPS62743EVM-689 Evaluation Module Copyright © 2015–2016, Texas Instruments Incorporated 5 Board Layout www.ti.com Figure 2. Top Layer 6 TPS62743EVM-689 Evaluation Module SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated Board Layout www.ti.com Figure 3. Bottom Layer SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback TPS62743EVM-689 Evaluation Module Copyright © 2015–2016, Texas Instruments Incorporated 7 Schematic and Bill of Materials 5 www.ti.com Schematic and Bill of Materials This section provides the TPS62743EVM-689 schematic and bill of materials. 5.1 Schematic Figure 4 illustrates the TPS62743EVM-689 schematic. R1 J4 1 GND 5 4 3 2 VIN J3 VOUT U1 VIN VIN 2.0V to 5.5V EN J1 1 2 3 4 5 6 S+ SGND C5 47µF C3 C1 4.7µF VSEL1 VSEL2 VSEL3 A2 B1 C1 D1 D2 GND L1 VIN SW EN VOS VSEL1 VSEL2 VSEL3 GND SW A1 2.2uH C2VOUT J2 C2 10µF 1 2 3 4 5 6 C4 B2 VOUT 1.2V to 3.3V S+ SGND TPS62743YFPR GND GND 1 2 3 ON EN OFF GND VIN JP1 GND 1 2 3 VIN VHIGH VOUT VOUT JP2 1 2 3 HIGH VSEL1 LOW VIN VHIGH VHIGH JP3 GND 1 2 3 HIGH VSEL2 LOW VHIGH JP4 GND 1 2 3 HIGH VSEL3 LOW VHIGH JP5 GND Figure 4. TPS62743EVM-689 Schematic 8 TPS62743EVM-689 Evaluation Module SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com 5.2 Bill of Materials Table 2 lists the TPS62743EVM-689 bill of materials. Table 2. TPS62743EVM-689 Bill of Materials Count RefDes Value Description Size Part Number MFR 1 C1 4.7µF Capacitor, Ceramic, X5R, 6.3V, 20% 0402 GRM155R61C475ME15 Murata 1 C2 10µF Capacitor, Ceramic, X5R, 6.3V, 20% 0402 GRM155R60J106ME11 Murata 2 C3, C4 not populated 1 C5 47µF Capacitor, Ceramic, X5R, 6.3V, 20% 2016 GRM32ER61C476ME15L Murata 1 L1 2.2µH Inductor, SMT, 0.7A, 230-mΩ 0805 1285AS-H-2R2M Toko 1 U1 TPS62743 IC, 360 nA IQ Step Down Converter 1.6mm x 0.9mm 8-Ball DSBGA TPS62743YFP TI 0603 Revision History Changes from Original (June 2015) to A Revision ......................................................................................................... Page • Changed first two rows of RefDes and Value columns in the bill of materials. ................................................... 9 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. SLVUAF5A – June 2015 – Revised January 2016 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated Revision History 9 STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES 1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. Acceptance of the EVM is expressly subject to the following terms and conditions. 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 and conditions 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. 2 Limited Warranty and Related Remedies/Disclaimers: 2.1 These terms and conditions 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 any defects that are 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. Moreover, TI shall not be liable for any defects that result from User's design, specifications or instructions for such EVMs. Testing and other quality control techniques are used to the extent TI deems necessary or as mandated by government requirements. TI does not test all parameters of each EVM. 2.3 If any EVM fails to conform to the warranty set forth above, TI's sole liability shall be at its option to repair or replace such EVM, 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. 3 Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: 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. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER 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 Concerning EVMs Including Radio Transmitters: This device complies with Industry Canada license-exempt RSS standard(s). 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 by Radio Law of Japan to follow the instructions below with respect to EVMs: 1. 2. 3. 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, Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to EVMs, or 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. SPACER SPACER SPACER SPACER SPACER 【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. 2. 3. 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。 実験局の免許を取得後ご使用いただく。 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 SPACER 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. SPACER SPACER SPACER SPACER SPACER SPACER SPACER 6. Disclaimers: 6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (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 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 AND CONDITIONS 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 MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF THE EVM. 7. USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. 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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 ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED. 8.2 Specific Limitations. IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND CONDITIONS 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. 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