User's Guide SBVU023 - August 2014 TPS3847085EVM-577 Evaluation Module This user's guide describes the operational use of the TPS3847085EVM-577 evaluation module (EVM) as a reference design for engineering demonstration and evaluation of the TPS3847085, an ultralow-power, wide supply voltage, supervisory circuit. Included in this user's guide are setup instructions, a schematic diagram, printed circuit board (PCB) layout drawings, and a bill of materials for the EVM. 1 2 3 4 5 6 7 Contents Introduction ................................................................................................................... Hardware...................................................................................................................... 2.1 Input and Output Connectors ..................................................................................... 2.2 Components ......................................................................................................... Setup and Test ............................................................................................................... Operation ..................................................................................................................... Board Layout ................................................................................................................. Schematic ..................................................................................................................... Bill of Materials ............................................................................................................... 2 2 2 2 3 3 4 5 5 List of Figures ............................................................................................................... 1 Top Silkscreen 2 Top Layer Routing ........................................................................................................... 4 4 3 Bottom Layer Routing ....................................................................................................... 4 4 TPS3847085EVM-577 Schematic ......................................................................................... 5 List of Tables 1 TPS3847085EVM-577 Bill of Materials ................................................................................... 5 SBVU023 - August 2014 Submit Documentation Feedback TPS3847085EVM-577 Evaluation Module Copyright (c) 2014, Texas Instruments Incorporated 1 Introduction 1 www.ti.com Introduction The Texas Instruments TPS3847085EVM-577 EVM helps design engineers to evaluate the operation and performance of the TPS3847xxx family of supervisors for possible use in their own circuit applications. This particular EVM configuration contains the TPS3847085 supervisor with an internal push-pull RESET output, in a 5-pin, DBV (SOT-23) package. The TPS3847xxx is an ultralow quiescent current, supervisory circuit with a fixed threshold voltage. The threshold voltage is indicated by the last three digits of the part number. In this case, 085 indicates the 8.5-V, fixed-threshold version; other values indicate various fixed thresholds. This document describes the configuration and setup of the TPS3847085EVM-577 EVM board. 2 Hardware This section describes the connectors on the EVM, as well as how to properly connect, set up, and use the TPS3847085EVM-577. 2.1 2.1.1 Input and Output Connectors J1--VDD The power-supply connection and the signal that is being monitored by the TPS3847085. RESET transitions low when the power-supply voltage drops below the threshold. Two pins are provided to allow space for multiple connections. Note that the device data sheet uses VCC to denote the power supply. In this case, VCC and VDD are functionally equivalent. 2.1.2 J2--GND Return connector for the input power supply. Two pins are provided to allow space for multiple connections. 2.1.3 J3--RESET This connector is the RESET output. Connect this output to a multimeter, oscilloscope, or external circuit to verify that RESET goes low when VDD goes below the threshold. Two pins are provided to allow space for multiple connections. 2.1.4 J4--VPU VPU is the test point connection to the MR pin. If manual reset is required, then an external source is required. Connect this external source to the VPU terminal. If manual reset is not required, place a shorting jumper on J4 connecting VPU (and thus MR) to VDD. 2.1.5 J5--RPU This connector is used for the pull-up version of the TPS3847, and is not connected for the push-pull version. Connect the RPU terminal to a power supply; the voltage on this power supply is the logic-high value for RESET. Two pins are provided to allow space for multiple connections. 2.2 2.2.1 Components S1 This switch is normally open and connected to MR and GND. Use this switch to trigger a manual reset event instead of using an external supply. 2.2.2 C1 This 100-nF input capacitor is connected to VDD and GND. Although not required for proper device operation, this capacitor helps reduce the impedance of the input supply line. Use this capacitor in order to reduce the effects of the periodic increased quiescent current when the reference voltage is refreshed. All trademarks are the property of their respective owners. 2 TPS3847085EVM-577 Evaluation Module Copyright (c) 2014, Texas Instruments Incorporated SBVU023 - August 2014 Submit Documentation Feedback Setup and Test www.ti.com 2.2.3 R1 This 47-k resistor is used only for the pull-up version of the TPS3847, and is not installed on this EVM. 2.2.4 R2 This 1-M resistor connects the VPU jumper (J4) to the MR pin and S1. This resistor allows MR to be shorted to GND without drawing excessive amounts of current from the power supply connected to VPU. 3 Setup and Test * * * * * 4 Set the input power supply voltage to 0 V. Connect the positive voltage lead from the power supply to J1 (VDD). Connect the ground lead from the power supply to J2 (GND). Short VPU to VDD using a jumper, or connect it to a separate power supply. Connect a voltmeter across J3 (RESET) and J2 (GND). Vary the input power-supply voltage as necessary for test purposes. Vary the power supply connected to VPU as necessary, or use S1 to short MR to GND in order to test the manual reset functionality. Operation The TPS3847085EVM-577 is a fixed, single-rail monitor, and triggers a reset when its own supply rail VDD falls below the set threshold of 8.5 V. An internal push-pull RESET circuit eliminates the need for a pull-up resistor. SBVU023 - August 2014 Submit Documentation Feedback TPS3847085EVM-577 Evaluation Module Copyright (c) 2014, Texas Instruments Incorporated 3 Board Layout 5 www.ti.com Board Layout Figure 1. Top Silkscreen Figure 2. Top Layer Routing Figure 3. Bottom Layer Routing 4 TPS3847085EVM-577 Evaluation Module Copyright (c) 2014, Texas Instruments Incorporated SBVU023 - August 2014 Submit Documentation Feedback Schematic www.ti.com 6 Schematic VPU VDD VDD J4 RPU J1 J5 C1 0.1 F R2 1 M R1 1 47 k VDD TPS3847 RESET MR RESET J3 S1 GND GND J2 1 Not Installed Figure 4. TPS3847085EVM-577 Schematic 7 Bill of Materials Table 1. TPS3847085EVM-577 Bill of Materials (1) (2) (3) Qty Designator Value (2) (3) (4) Part Number Manufacturer 402 STD STD Header, Male 2-pin, 100mil spacing, 0.100 inch x 2 PEC02SAAN Sullins C1 5 J1, J2, J3, J4, J5 0 R1 47 k RES 47K OHM 1/20W 5% 0201 SMD 0603 ERJ-1GEJ473C Panasonic 1 R2 1 M RES, 1.00Meg ohm, 1%, 0.1W, 0603 0603 CRCW06031M00FKEA Vishay-Dale 1 S1SH-J4 1x2 Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M Switch, Tactile, SPST-NO, 1VA, 32V, SMT 6.3 x 5.36 x 6.6 mm, SMT KT11P2JM34LFS C&K Components IC, Supply Voltage Supervisory Circuit, 8.5V SOT23-5 TPS3847085DBV TI PCB, 1.30 in x 1.645 in x 0.062 in 1.30 in x 1.70 in x 0.062 in PWR577 Any S1 1 U1 (4) 1 (1) Size 1 1 100 nF Description Capacitor, Ceramic Chip, 20V, X5R, 10% These assemblies are electrostatic-discharge (ESD) sensitive; observe ESD precautions. These assemblies must be clean and free from flux and all contaminants. Do not use no-clean flux. These assemblies must comply with workmanship standards IPC-A-610 Class 2. Cannot be substituted. All other components can be substituted with equivalent manufacturer components. SBVU023 - August 2014 Submit Documentation Feedback TPS3847085EVM-577 Evaluation Module Copyright (c) 2014, Texas Instruments Incorporated 5 ADDITIONAL TERMS AND CONDITIONS, WARNINGS, RESTRICTIONS, AND DISCLAIMERS FOR EVALUATION MODULES Texas Instruments Incorporated (TI) markets, sells, and loans all evaluation boards, kits, and/or modules (EVMs) pursuant to, and user expressly acknowledges, represents, and agrees, and takes sole responsibility and risk with respect to, the following: 1. User agrees and acknowledges that EVMs are intended to be handled and used for feasibility evaluation only in laboratory and/or development environments. Notwithstanding the foregoing, in certain instances, TI makes certain EVMs available to users that do not handle and use EVMs solely for feasibility evaluation only in laboratory and/or development environments, but may use EVMs in a hobbyist environment. All EVMs made available to hobbyist users are FCC certified, as applicable. Hobbyist users acknowledge, agree, and shall comply with all applicable terms, conditions, warnings, and restrictions in this document and are subject to the disclaimer and indemnity provisions included in this document. 2. Unless otherwise indicated, EVMs are not finished products and not intended for consumer use. EVMs are intended solely for use by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems, and subsystems. 3. User agrees that EVMs shall not be used as, or incorporated into, all or any part of a finished product. 4. User agrees and acknowledges that certain EVMs may not be designed or manufactured by TI. 5. User must read the user's guide and all other documentation accompanying EVMs, including without limitation any warning or restriction notices, prior to handling and/or using EVMs. Such notices contain important safety information related to, for example, temperatures and voltages. For additional information on TI's environmental and/or safety programs, please visit www.ti.com/esh or contact TI. 6. User assumes all responsibility, obligation, and any corresponding liability for proper and safe handling and use of EVMs. 7. Should any EVM not meet the specifications indicated in the user's guide or other documentation accompanying such EVM, the EVM may be returned to TI within 30 days from the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY TI TO USER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. TI SHALL NOT BE LIABLE TO USER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RELATED TO THE HANDLING OR USE OF ANY EVM. 8. 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 EVMs might be or are used. TI currently deals with a variety of customers, and therefore TI's 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 with respect to the handling or use of EVMs. 9. User assumes sole responsibility to determine whether EVMs may be subject to any applicable federal, state, or local laws and regulatory requirements (including but not limited to U.S. Food and Drug Administration regulations, if applicable) related to its handling and use of EVMs and, if applicable, compliance in all respects with such laws and regulations. 10. User has sole responsibility to ensure the safety of any activities to be conducted by it and its employees, affiliates, contractors or designees, with respect to handling and using EVMs. Further, user is responsible to ensure that any interfaces (electronic and/or mechanical) between EVMs 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. 11. User shall employ reasonable safeguards to ensure that user's use of EVMs will not result in any property damage, injury or death, even if EVMs should fail to perform as described or expected. 12. User shall be solely responsible for proper disposal and recycling of EVMs consistent with all applicable federal, state, and local requirements. Certain Instructions. User shall operate EVMs within TI's recommended specifications and environmental considerations per the user's guide, accompanying documentation, and any other applicable requirements. Exceeding the specified ratings (including but not limited to input and output voltage, current, power, and environmental ranges) for EVMs may cause property damage, personal injury or death. If there are questions concerning these ratings, 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 result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the applicable 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 60C 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 EVMs' schematics located in the applicable EVM user's guide. When placing measurement probes near EVMs during normal operation, please be aware that EVMs may become very warm. As with all electronic evaluation tools, only qualified personnel knowledgeable in electronic measurement and diagnostics normally found in development environments should use EVMs. Agreement to Defend, Indemnify and Hold Harmless. User agrees to defend, indemnify, and hold TI, its directors, officers, employees, agents, representatives, affiliates, 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 and/or use of EVMs. User's indemnity shall apply whether Claims arise under law of tort or contract or any other legal theory, and even if EVMs fail to perform as described or expected. Safety-Critical or Life-Critical Applications. If user intends to use EVMs in evaluations of safety critical applications (such as life support), and a failure of a TI product considered for purchase by user for use in user's 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 user must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. RADIO FREQUENCY REGULATORY COMPLIANCE INFORMATION FOR EVALUATION MODULES Texas Instruments Incorporated (TI) evaluation boards, kits, and/or modules (EVMs) and/or accompanying hardware that is marketed, sold, or loaned to users may or may not be subject to radio frequency regulations in specific countries. General Statement for EVMs Not Including a Radio For EVMs not including a radio and not subject to the U.S. Federal Communications Commission (FCC) or Industry Canada (IC) regulations, TI intends EVMs to be used only for engineering development, demonstration, or evaluation purposes. EVMs are not finished products typically fit for general consumer use. EVMs may nonetheless generate, use, or radiate radio frequency energy, but have not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or the ICES-003 rules. Operation of such EVMs 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: For EVMs including a radio, the radio included in such EVMs is intended for development and/or professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability in such EVMs and their development application(s) must comply with local laws governing radio spectrum allocation and power limits for such EVMs. 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 TI unless user has obtained appropriate experimental and/or development licenses from local regulatory authorities, which is the sole responsibility of the user, including its acceptable authorization. U.S. Federal Communications Commission Compliance 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 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 its 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. Industry Canada Compliance (English) 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. Canada Industry Canada Compliance (French) Cet appareil numerique de la classe A ou B est conforme a la norme NMB-003 du Canada Les changements ou les modifications pas expressement approuves par la partie responsable de la conformite ont pu vider l'autorite de l'utilisateur pour actionner l'equipement. Concernant les EVMs avec appareils radio Le present appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisee aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioelectrique subi, meme si le brouillage est susceptible d'en compromettre le fonctionnement. Concernant les EVMs avec antennes detachables Conformement a la reglementation d'Industrie Canada, le present emetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inferieur) approuve pour l'emetteur par Industrie Canada. Dans le but de reduire les risques de brouillage radioelectrique a l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnee equivalente (p.i.r.e.) ne depasse pas l'intensite necessaire a l'etablissement d'une communication satisfaisante. Le present emetteur radio a ete approuve par Industrie Canada pour fonctionner avec les types d'antenne enumeres dans le manuel d'usage et ayant un gain admissible maximal et l'impedance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est superieur au gain maximal indique, sont strictement interdits pour l'exploitation de l'emetteur. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright (c) 2014, Texas Instruments Incorporated spacer Important 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. 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