UCC28711EVM-160

Using the UCC28711EVM-160 User's Guide Literature Number: SLUUA12 November 2012 www.ti.com WARNING Always follow TI’s set-up and application instructions, including use of all interface components within their recommended electrical rated voltage and power limits. Always use electrical safety precautions to help ensure your personal safety and the safety of those working around you. Contact TI’s Product Information Center http://support/ti./com for further information. Save all warnings and instructions for future reference. Failure to follow warnings and instructions may result in personal injury, property damage, or death due to electrical shock and/or burn hazards. The term TI HV EVM refers to an electronic device typically provided as an open framed, unenclosed printed circuit board assembly. It is intended strictly for use in development laboratory environments, solely for qualified professional users having training, expertise, and knowledge of electrical safety risks in development and application of high-voltage electrical circuits. Any other use and/or application are strictly prohibited by Texas Instruments. If you are not suitably qualified, you should immediately stop from further use of the HV EVM. 1. Work Area Safety: (a) Keep work area clean and orderly. (b) Qualified observer(s) must be present anytime circuits are energized. (c) Effective barriers and signage must be present in the area where the TI HV EVM and its interface electronics are energized, indicating operation of accessible high voltages may be present, for the purpose of protecting inadvertent access. (d) All interface circuits, power supplies, evaluation modules, instruments, meters, scopes and other related apparatus used in a development environment exceeding 50 VRMS/75 VDC must be electrically located within a protected Emergency Power Off (EPO) protected power strip. (e) Use a stable and non-conductive work surface. (f) Use adequately insulated clamps and wires to attach measurement probes and instruments. No freehand testing whenever possible. 2. Electrical Safety: (a) De-energize the TI HV EVM and all its inputs, outputs, and electrical loads before performing any electrical or other diagnostic measurements. Revalidate that TI HV EVM power has been safely deenergized. (b) With the EVM confirmed de-energized, proceed with required electrical circuit configurations, wiring, measurement equipment hook-ups and other application needs, while still assuming the EVM circuit and measuring instruments are electrically live. (c) Once EVM readiness is complete, energize the EVM as intended. WARNING: while the EVM is energized, never touch the EVM or its electrical circuits as they could be at high voltages capable of causing electrical shock hazard. 3. Personal Safety: (a) Wear personal protective equipment e.g. latex gloves and/or safety glasses with side shields or protect EVM in an adequate lucent plastic box with interlocks from accidental touch. 4. Limitation for Safe Use: (a) EVMs are not to be used as all or part of a production unit. 2 SLUUA12 – November 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated User's Guide SLUUA12 – November 2012 Using the UCC28711EVM-160 5-W USB Adapter 1 Description The UCC28711EVM-160 is a 5-W evaluation module for evaluating an off-line adapter for USB applications. It is intended for evaluation purposes and is not intended to be an end product. The UCC28711EVM-160 converts 100-V to 240-V RMS input voltage down to 5-V DC, with a 1-A current limit for USB adapter applications. Figure 1. UCC28711EVM-160 SLUUA12 – November 2012 Submit Documentation Feedback Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated 3 Electrical Performance Specifications 2 www.ti.com Electrical Performance Specifications Table 1. UCC28711EVM-160 Electrical Performance Specifications SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNITS Input Characteristics VIN Input voltage No load input power (115-V and 230-V RMS input) 100 115/23 0 VIN = nom, IOUT = 0 A 240 V 10 mW Output Characteristics VOUT Output voltage VIN = nom, IOUT = nom Line regulation VIN = min to max, IOUT = nom 4.75 5 5.25 3% V Load regulation VIN = nom, IOUT = min to max 3% VOUT_ripple Output voltage ripple VIN = nom, IOUT = max 0.1 mVpp IOUT Output current VIN = min to max 1 1.1 A VOVP Output OVP IOUT = min to max 5.75 V Transient Response VOUT Load Step (VOUT = 4.1 V to 6 V) 0.1 A to 0.6 A 4.1 6 74.0% 76% 25 40 V Systems Characteristics Top 4 Full load efficiency (115-V and 230-V RMS input) Rload = 5 Ω Operating temperature range VIN = min to max, IOUT = min to max Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated °C SLUUA12 – November 2012 Submit Documentation Feedback SLUUA12 – November 2012 Submit Documentation Feedback Neutral Line J2 1 3 2 R9 TP4 10 ohm Fusible Resistor TP3 VIN = 90V to 256V RMS HD06 D5 + 4.7 uF C6 470 uH L1 649 + 4.7 uF C7 SMBJP6KE82A D3 R6 10 R8 1.96 D4 7 9 R11 27.4k R5 82.5k RS1B-13-F 2 5 1 4 3 Note: No Value Means Not Populated R7 10.0k STD2HNK70Z-1 Q1 MURS160-13-F D1 330nF C5 R4 22.5 100k R10 B340LB-13-F D2 1nF C1 + 4 GND 2 + TP1 CS 5 DRV 6 TP2 560 uF C4 HV 8 U1 UCC28711D JP1 3 CBC/NTC 2 VS 1 VDD 1 560 uF C3 39 R1 R12 1.00k VOUT - R3 15.4k VOUT + J1 Vout = 5V/1A 3 1nF C2 R2 T1 7508110127REV01 www.ti.com Schematic Schematic Figure 2. UCC28711EVM-160 Schematic Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated 5 Test Setup 4 www.ti.com Test Setup Safety: This evaluation module is not encapsulated and there are voltages that are much greater than 50 V DC. NOTE: If you are not trained in the proper safety of handling and testing power electronics please do not test this evaluation module. Voltage Source: Isolated AC source or variable AC transformer capable of 265-V AC cable of handling 10 W. Voltmeter: Two digital voltage meter. Power Analyzer: Capable of measuring 1 mW to 10 W of input power capable of handling 265-V RMS input voltage. Most power analyzers require a precision shunt resistor for measuring input current to measure input power of 5 W or less. Please read power analyzer’s User manual for proper setup. Oscilloscope: • Four channel 100 MHz. • Probes capable of handling 600 V. Output Load: Resistive or electronic load capable handling 5 W at 5 V. Recommended Wire Gauge: Insulated 22 AWG. Power Analyzer Current Measurement Voltage Measurement Volt Meter UCC28711EVM-160 TP3 AC Line Isolated Variable AC Source TP1 1 1 J2 3 TP4 VOUT + J1 1uF AC Neutral 1 ohm Precision Shunt Scope Probe Load VOUT 2 TP2 Oscilloscope Figure 3. Test Setup 6 Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated SLUUA12 – November 2012 Submit Documentation Feedback List of Test Points www.ti.com 5 List of Test Points Table 2. Test Point Function TEST POINTS NAME DESCRIPTION TP3 AC line TP4 AC neutral Kelvin connection for AC line TP1 VOUT + Kelvin connection for VOUT + TP2 VOUT - Kelvin connection for VOUT - Kelvin connection for AC neutral 6 Performance Data and Typical Characteristic Curves 6.1 Efficiency Efficiency 78% 76% % Efficiency 74% 72% 70% Efficiency @ 115V RMS 68% Efficiency @ 230V RMS 66% 64% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Output Power Figure 4. UCC28711EVM-160 Efficiency SLUUA12 – November 2012 Submit Documentation Feedback Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated 7 Performance Data and Typical Characteristic Curves 6.2 Startup at 115 V Figure 5. No Load 6.3 Figure 6. 5-Ω Load Startup at 230 V Figure 7. No Load 8 www.ti.com Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated Figure 8. 5-Ω Load SLUUA12 – November 2012 Submit Documentation Feedback Performance Data and Typical Characteristic Curves www.ti.com 6.4 6.5 Load Transient at 115 V RMS Figure 9. 0.1-A to 0.6-A Load Step 6.5 Figure 10. 0.6-A to 0.1-A Load Step Load Transient at 230 V RMS Figure 11. 0.1-A to 0.6-A Load Step SLUUA12 – November 2012 Submit Documentation Feedback Figure 12. 0.6-A to 0.1-A Load Step Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated 9 Performance Data and Typical Characteristic Curves 6.6 www.ti.com Output Ripple Voltage at Full Load • • CH4 = VOUT at EVM output. CH2 = VOUT measure at the end of the 3 M of cable in parallel with a 1-µF capacitor. The output voltage has less than 50 mV of output ripple at the end of the cable. Figure 13. Output Ripple Voltage at Full Load 10 Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated SLUUA12 – November 2012 Submit Documentation Feedback EVM Assembly Drawing and PCB Layout www.ti.com 7 EVM Assembly Drawing and PCB Layout Figure 14. Top Assembly Drawing Figure 15. Top PCB Drawing SLUUA12 – November 2012 Submit Documentation Feedback Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated 11 EVM Assembly Drawing and PCB Layout www.ti.com Figure 16. Bottom Assembly Drawing Figure 17. CB Assembly Drawing 12 Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated SLUUA12 – November 2012 Submit Documentation Feedback List of Materials www.ti.com 8 List of Materials The EVM components list according to the schematic shown in Figure 2. Table 3. UCC28711EVM-160 List of Materials COUNT RefDes Description Part Number MFR 1 C1 Capacitor, ceramic, 50 V, X7R, ±10%, 0805, 1 nF STD STD 1 C5 Capacitor, ceramic, 50 V, X7R, ±10%, 0805, 330 nF STD STD 1 C2 Capacitor, ceramic chip, 200 V, X7R, ±10%, 1206, 1 nF STD STD 2 C3, C4 Capacitor, electrolytic, 16 VDC, -55 to 125°C, ±20%, 560 µF EEU-FC1C561 Panasonic 2 C6, C7 Capacitor, electrolytic, 400 V, -25 to 85°C, ±20%, 4.7 µF UVR2G4R7MPD Nichicon 1 D1 Diode, ultrafast rectifier, 1 A, 600 V, SMB MURS160-13-F Diodes Inc 1 D2 Diode, Schottky, 3 A, 40 V, SMB B340LB Diodes Inc 1 D3 Diode, transient voltage suppressor, 600 W, 82 V, SMB SMBJP6KE82A-TP Micro Commercial Co 1 D4 Diode, 1 A, 100 V, SMA RS1B-13-F Diodes Inc 1 D5 Bridge rectifier, 600 V, 0.8 A, glass passivated, SMD HD04 Diodes, Inc 1 J1 Terminal block, 2 pin, 6 A, 3.5 mm ED555/2DS OST 1 J2 Terminal block, 3 pin, 15 A, 5.1 mm ED120/3DS OST 1 JP1 Jumper, 0.400 inch, PVC insulation, AWG 22, 923345-04-C 3M 1 L1 Inductor, radial , ±10%, 470 µH RLB0608-471KL Bourns 1 Q1 MOSFET, N-channel, 700 V, 1.6 A, 7 Ω, IPAK STD2NK70Z-1 Vishay 1 R1 Resistor, chip 1/4 W, ±1%, 1206, 39 Ω STD STD 1 R10 Thermistor NTC, 100 kΩ, SMD, 0805 NTCS0805E3104FXT Vishay BC Components 1 R11 Resistor, chip, 1/10 W, 1%, 0805, 27.4 kΩ STD STD 1 R12 Resistor, chip, 1/10 W, 1%, 0805, 1.00 kΩ STD STD 1 R2 Resistor, chip, 1/10 W, 1%, 0805, 649 Ω STD STD 1 R3 Resistor, chip, 1/10 W, 1%, 0805, 15.4 kΩ STD STD 1 R4 Resistor, chip, 1/10 W, 1%, 0805, 22.5 Ω STD STD 1 R5 Resistor, chip, 1/10 W, 1%, 0805, 82.5 kΩ STD STD 1 R6 Resistor, chip, 1/10 W, 1%, 0805, 10 Ω STD STD 1 R7 Resistor, chip, 1/10 W, 1%, 0805, 10.0 kΩ STD STD 1 R8 Resistor, chip 1/4 W, ±1%, 1206, 1.96 Ω STD STD 1 R9 10 ohm, TH fusible power resistor, 3 W, 10 Ω PWR4522AS10R0JA Bourns 1 T1 Transformer, ±10%, 1.05 mH, 4.24:1 7508110127REV01 4 TP1, TP2, Test point, red, thru-hole color keyed TP3, TP4 5000 Keystone 1 U1 UCC28711D TI SLUUA12 – November 2012 Submit Documentation Feedback Constant-Voltage, Constant-Current PWM With PrimarySide Regulation, SO-8 Using the UCC28711EVM-160 5-W USB Adapter Copyright © 2012, Texas Instruments Incorporated 13 EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: 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. 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 LIMITED 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. 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. 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 visit www.ti.com/esh or contact TI. 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. 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. REGULATORY COMPLIANCE INFORMATION As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal Communications Commission (FCC) and Industry Canada (IC) rules. For EVMs not subject to the above rules, this evaluation board/kit/module 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 or ICES-003 rules, which are designed to provide reasonable protection against radio frequency interference. Operation of the equipment 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. General Statement for EVMs including a radio User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization. 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 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 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. For EVMs annotated as IC – INDUSTRY CANADA Compliant This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Concerning EVMs including radio transmitters This device complies with Industry Canada licence-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. 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. Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada. Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement. 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. 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. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER 【Important Notice for Users of this Product in Japan】 】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product 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 this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product, or Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product. Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp 【ご使用にあたっての注】 本開発キットは技術基準適合証明を受けておりません。 本製品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 http://www.tij.co.jp SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end product. Your Sole Responsibility and Risk. You acknowledge, represent and agree that: 1. 2. 3. 4. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees, affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates, contractors or designees, using the EVM. Further, you are responsible to assure 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. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even if the EVM should fail to perform as described or expected. You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials. Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please 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 result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. 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 60°C as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please be aware that these devices may be very warm to the touch. As with all electronic evaluation tools, only qualified personnel knowledgeable in electronic measurement and diagnostics normally found in development environments should use these EVMs. Agreement to Defend, Indemnify and Hold Harmless. You agree to 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 use of the EVM that is not in accordance with the terms of the agreement. This obligation shall apply whether Claims arise under law of tort or contract or any other legal theory, and even if the EVM fails to perform as described or expected. Safety-Critical or Life-Critical Applications. If you intend to evaluate the components for possible use in safety critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, such as devices which are classified as FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. 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