UCC3817EVM

Using the UCC3817EVM User's Guide Literature Number: SLUU077D September 2000 – Revised November 2014 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 SLUU077D – September 2000 – Revised November 2014 Submit Documentation Feedback Copyright © 2000–2014, Texas Instruments Incorporated User's Guide SLUU077D – September 2000 – Revised November 2014 UCC3817EVM BiCMOS Power Factor Preregulator Evaluation Board 1 Introduction This user’s guide details the Texas Instruments (TI) UCC3817EVM BiCMOS Power Factor Preregulator Evaluation Module (EVM). It includes a list of EVM features, a brief description of the module illustrated with pictorial, schematic diagram and an EVM specification. The UCC3817EVM evaluation board is designed to illustrate the performance of the controller in a 250-W boost converter with Power Factor Correction (PFC). The board is designed to handle a universal input operating voltage range (85 VAC to 265 VAC) with a regulated 385-V DC output. CAUTION Proper precautions must be taken when working with the board. • High voltage levels are present on the evaluation board whenever it is energized. • The output capacitor has high levels of energy storage and it must be discharged before the load is removed. • Improper handling of the evaluation board could cause serious injury. • It is important to maintain the ambient temperature around the evaluation board to below 40°C during operation. Description The UCCx817 provides all the functions necessary for active power-factor-corrected preregulators. The controller achieves near-unity power factor by shaping the AC input-line current waveform to correspond to that of the ac input-line voltage. Average current-mode control maintains stable, low-distortion, sinusoidal line current. The controller’s operation is similar to previously designed Unitrode preregulators with an added feature to reduce the RMS-current in the boost capacitor. The controller uses leading-edge modulation that, when synchronized properly with a downstream DC-to-DC converter, reduces the RMS current in the boost capacitor. 1.1 Features • • • • • Designed for Compliance with IEC 1000-3-2 (Low Total Harmonic Distortion) Worldwide Line Operation 85 VRMS to 265 VRMS Regulated 385-V, 250-W(max), DC Output Accurate Power Limiting Accurate Overvoltage Protection SLUU077D – September 2000 – Revised November 2014 Submit Documentation Feedback UCC3817EVM BiCMOS Power Factor Preregulator Evaluation Board Copyright © 2000–2014, Texas Instruments Incorporated 3 Introduction www.ti.com Schematic C10 1 PF R16 100 : C11 1 PF VCC HIGH TEMPERATURE - SEE EVM WARNINGS AND RESTRICTIONS D7 D8 R15 51 k R21 R13 383 k: 383 k: VO D1 6 A, 600 V IAC VLINE 85-265 VRMS C14 1.5 PF 400 V + L1 1 mH F1 AC2 C13 0.47 PF 600 V D2 8 A, 600 V D3 C12 220 PF 450 V Q1 6A 600 V AC1 VO HIGH VOLTAGE SEE EVM WARNINGS AND RESTRICTIONS R14 0.25 :5 W VOUT 385VDC t R9 4.02 k: R12 2 k: R10 4.02 k: 1 GND DRVOUT 16 VCC D4 2 PKLIMIT 3 CAOUT 4 CAI 5 MOUT D5 (OPTIONAL) R11 10 k: GND R17 20 : UCC3817 VCC C3 1 PF CER HIGH VOLTAGE SEE EVM WARNINGS AND RESTRICTIONS 15 C2 100 PF AI EI C1 560 pF VREF C9 1.2 nF R8 12 k: C8 270 pF D6 (OPTIONAL) 14 SS 13 RT 12 VSENSE 11 IAC C4 0.01 PF 6 IAC C7 150 nF R7 100 k: CT C15 3.3 PF 7 VAOUT 8 VFF R1 12 k: R2 R19 499 k: 499 k: R3 20 k C6 2.2 PF R6 30 k: R20 274 k: OVP/EN VO R4 249 k: 10 C5 1 PF VREF R5 10 k: 9 VREF Figure 1. UCC3817EVM Schematic NOTE: High-voltage component. See EVM Warnings and Restrictions at the back of this document. High-temperature component. See EVM Warnings and Restrictions at the back of this document. 4 UCC3817EVM BiCMOS Power Factor Preregulator Evaluation Board SLUU077D – September 2000 – Revised November 2014 Submit Documentation Feedback Copyright © 2000–2014, Texas Instruments Incorporated Introduction www.ti.com Operating Guidelines The operating guidelines for the evaluation board are provided with reference to the schematic in Figure 1. NOTE: In order for the output voltage to regulate, a load of 10 W must be applied to the evaluation board’s output. In order to maintain power factor near unity, the voltage loop is designed with a slow frequency response. Large transient steps in output current can cause the evaluation module to go out of regulation. Step 1, Load Connections A resistive or electronic load should be applied to the output connections of VO and GND. NOTE: For safety reasons the load should be connected before power is supplied to the evaluation board. Step 2, Applying Input Power A 50-Hz or 60-Hz AC power source not exceeding 265 VRMS and providing an isolated output needs be applied across terminals AC1 and AC2 for proper operation. If an isolated AC output is unavailable, or if the EVM will be evaluated with the AC wall outlet as power source, then an isolation line transformer MUST be inserted between the AC source/wall outlet and the AC input connector of the EVM. Step 3, Measuring the Evaluation Board’s Performance With the AC source set between 85 VRMS and 265 VRMS, the output voltage should be regulated and the input current should track the input-voltage shape with near-unity power factor. The operation of the circuit is verified over the line and load range and shows efficiency in the 90% to 95% range. At lighter loads, there may be some distortion in the line current due to DCM operation. Please refer to Figure 3 and Figure 4 for typical evaluation board performance. SLUU077D – September 2000 – Revised November 2014 Submit Documentation Feedback UCC3817EVM BiCMOS Power Factor Preregulator Evaluation Board Copyright © 2000–2014, Texas Instruments Incorporated 5 Introduction www.ti.com Evaluation Board Layouts D2 V0 HIGH TEMPERATURE - SEE EVM WARNINGS AND RESTRICTIONS R18 R15 GND HS1 D1 D7 Q1 R14 HIGH VOLTAGE SEE EVM WARNINGS AND RESTRICTIONS C12 XL1 C10 R16 D8 R10 L1 C11 R9 C13 R17 R11 C9 C8 R13 D3 XC12 AC1 GND C2 R21 AC2 R12 D4 C3 U1 R22 C1 C4 R8 C15 C14 C7 C6 FA1 UCC3817 EVALUATION BOARD R7 VCC SYNC R1 R2 R19 R3 R4 R20 C5 D5 D6 HIGH VOLTAGE SEE EVM WARNINGS AND RESTRICTIONS R5 R6 Figure 2. UCC3817EVM Evaluation Board Layout Assembly NOTE: High-Voltage component. See EVM Warnings and Restrictions at the back of this document. High-Temperature component. See EVM Warnings and Restrictions at the back of this document. Typical Performance 100 1.2 VIN = 85 V VIN = 175 V VIN = 265 V 1.12 95 1.04 90 Power Factor Efficiency (%) 0.96 85 0.88 0.8 0.72 0.64 80 0.56 VIN = 85 V VIN = 175 V VIN = 265 V 75 25 50 75 100 125 150 175 Output Power 200 225 0.48 250 50 75 D001 Figure 3. Efficiency vs. Output Power 6 0.4 25 UCC3817EVM BiCMOS Power Factor Preregulator Evaluation Board 100 125 150 175 200 Output Power (W) 225 250 275 D001 Figure 4. Power Factor vs. Output Power SLUU077D – September 2000 – Revised November 2014 Submit Documentation Feedback Copyright © 2000–2014, Texas Instruments Incorporated Introduction www.ti.com List of Materials UCC3817EVM List of Materials (1) QTY (1) REF DES DESCRIPTION MANUFACTURER PART NUMBER 1 C1 Capacitors, ceramic, 560 pF, 50 V Panasonic ECU–S1H561JCA 1 C2 Capacitors, electronic, 100 μF, 25 V Panasonic EEU–FC1V101S 2 C3, C5 Capacitors, ceramic, 1 μF, 50 V Panasonic ECU–S1H105MEB 1 C4 Capacitors, ceramic, 0.01 μF, 50 V Panasonic ECU–S1H103KBA 2 C6, C15 Capacitors, ceramic, 2.2 μF, 50 V Panasonic ECU–S1H225MEB 1 C7 Capacitors, ceramic, 150 nF, 50 V, ±10% Panasonic ECU–S1H154KBB 1 C8 Capacitors, ceramic, 270 pF, 50 V, ±10% Panasonic ECU–S1H271JCA 1 C9 Capacitors, ceramic, 1.2 nF, 50 V, ±10% Panasonic ECU–S1H122JCB 2 C10, C11 Capacitors, stacked metal poly, 1 μF, 50 V Panasonic ECQ–V1H105JL 1 C12 Capacitors, electronic, 220 μF, 450 V Panasonic ECO–S2WB221DA 1 C13 Capacitors, 0.47 μF, 600 V (optional for user, not used on EVM) Panasonic ECQ–E6474KF 1 C14 Capacitors, Poly, 1.5 μF, 400 V Panasonic ECW–F4155JB 1 C16 Capacitors, Not used Panasonic ECU–S2A330JCA 1 D1 Diodes, 6 A, 600 V, ultra fast diode International Rectifier HFA08TB60 1 D2 Diodes, 8 A, 600 V, 400 A surge General Instruments GI756CT 1 D3 Diodes, 6 A, 600 V, bridge General Instruments PB66 4 D4, D5, D7, D8 Diodes, 1 A, 40 V, schottky STD 1N5819 1 D6 Diodes, 100 mA, 20 V, schottky STD BAT85 1 D9 Not used STD STD 1 F1 Fuses, 6 A, 250 V, 3 AG glass fast acting cartridge type STD STD 2 FH1, FH2 Fuses, 3AG fuse clip STD STD 1 HS1 Heat sink for Q1 Aavid 513201 1 HS2 Heat sink for D1 Aavid 579302 B 0 00 00 CTX08–13679–02 1 L1 Inductor, 1 mH, 5.5 A, 20:1 TR Cooper Electronic Technologies 1 Q1 MOSFETs International Rectifier IRFP450 1 R1 Resistors, 12.1 kΩ, 1/4 W STD STD 1 R3 Resistors, 20 kΩ STD STD 1 R4 Resistors, 249 kΩ STD STD 2 R5, R11 Resistors, 10 kΩ STD STD 1 R6 Resistors, 30.1 kΩ STD STD 1 R7 Resistors, 100 kΩ STD STD 1 R8 Resistors, 12.1 kΩ STD STD 2 R9, R10 Resistors, 4.02 kΩ STD STD 1 R12 Resistors, 2 kΩ STD STD 2 R12, R21 Resistors, 383 kΩ STD STD 1 R14 Resistors, 0.25 Ω, 3 W STD STD 2 R15, R18 Resistors, 24 kΩ, 1W, metal oxide/metal film Panasonic ERG 1S G 243 1 R16 Resistors, 100 Ω STD STD 1 R17 Resistors, 20 Ω STD STD 1 R18 Resistors, 24 kΩ, 1W, metal oxide/metal film Panasonic ERX 1S G 243 2 R2, R19 Resistors, 499 kΩ STD STD 1 R20 Resistors, 274 kΩ STD STD Unless otherwise specified, all resistors are 0.25 W metal film with a 1% tolerance. SLUU077D – September 2000 – Revised November 2014 Submit Documentation Feedback UCC3817EVM BiCMOS Power Factor Preregulator Evaluation Board Copyright © 2000–2014, Texas Instruments Incorporated 7 Revision History www.ti.com UCC3817EVM List of Materials (1) (continued) QTY REF DES DESCRIPTION MANUFACTURER PART NUMBER 1 R22 Resistors, 0-Ω jumper or 26 AWG wire STD STD 1 U1 UCC3817N Texas Instruments UCC3817N 1 X at U1 Socket, 16 pin DIP socket STD STD 1 PCB Board, UCC3817 bare pc board STD STD 1 X1 at Q1 Hardware, Thermal pad silicone TO220 STD STD 1 X2 at HS1 Hardware, Screw pan head #6–32 X 3/8 STD STD 1 X3 at HS1 Hardware, Nut #6X32 STD STD Additional Information For more information, pin description and specifications for the UCC3817 PFC Controller, please refer to the UCC3817 datasheet, Texas Instruments Literature Number SLUS395, or contact the Texas Instruments Semiconductor Product Information Center at 1–800–336–5236 or 1–972–644–5580. Product information can also be found on the at http://www.ti.com. This evaluation module can also be used to evaluate the performance of the UCC3818 PFC control device by removing R16 and applying the bias voltage to the VCC pin through a separate bias supply. Revision History Changes from C Revision (November 2002) to D Revision ........................................................................................... Page • Added first-page EVM warnings. ........................................................................................................ 2 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. 8 Revision History SLUU077D – September 2000 – Revised November 2014 Submit Documentation Feedback Copyright © 2000–2014, Texas Instruments Incorporated 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 are NOT certified by TI as conforming to Technical Regulations of Radio Law of Japan. If User uses EVMs in 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】 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 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. 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 AND CONDITIONS. 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. 8. Limitations on Damages and Liability: 8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED TO, COST OF REMOVAL OR REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, RETESTING, OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS, LOSS OF SAVINGS, LOSS OF USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN 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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