TPS3421EGEVM-156

User's Guide SLVU781 – October 2012 TPS3421EGEVM-156 Evaluation Module This user’s guide describes the operational use of the TPS3421EGEVM-156 evaluation module (EVM) as a reference design for engineering demonstration and evaluation of the TPS3421EGEVM, a dual-channel, push-button reset timer. Included in this user’s guide are setup instructions, a schematic diagram, PCB layout drawings, and a bill of materials for the evaluation module. This user’s guide also discusses how to modify the EVM board to evaluate the TPS3420 and TPS3422. 1 2 3 4 5 6 7 8 Contents Introduction .................................................................................................................. Setup ......................................................................................................................... 2.1 Input/Output Connector Descriptions ............................................................................ 2.2 Jumpers/Switches .................................................................................................. 2.3 Equipment Setup ................................................................................................... Operation ..................................................................................................................... 3.1 General Operation ................................................................................................. Board Layout ................................................................................................................ Schematic .................................................................................................................... Bill of Material ............................................................................................................... Evaluating the TPS3420 using the TPS3421EGEVM-156 Board .................................................... 7.1 Modifying the TPS3421EVM-156 Board ........................................................................ Evaluating the TPS3422 using the TPS3421EVM-156 Board ........................................................ 8.1 Modifying the TPS3421EVM-156 Board ........................................................................ 2 2 2 2 3 3 3 4 6 6 7 7 8 8 List of Figures ............................................................................... 1 TPS3421EG RST function for TS = GND 2 Assembly Layer ............................................................................................................. 4 3 Top Layer Routing .......................................................................................................... 5 4 Bottom Layer Routing ...................................................................................................... 5 5 TPS3421EGEVM-156 Schematic ......................................................................................... 6 6 TPS3420D RST Function for TS = GND 7 TPS3422EG RST Function for TS = GND............................................................................... 8 1 Connector JP1 Time-Delay Selections ................................................................................... 2 2 Connector JP2 Pull-Up Voltage Selections .............................................................................. 2 3 Connector JP3 Push-Button Performance ............................................................................... 3 4 TPS3421EGEVM-156 Bill of Material .................................................................................... 6 ................................................................................ 4 7 List of Tables SLVU781 – October 2012 Submit Documentation Feedback TPS3421EGEVM-156 Evaluation Module Copyright © 2012, Texas Instruments Incorporated 1 Introduction 1 www.ti.com Introduction TI's TPS3421EGEVM-156 EVM helps design engineers evaluate the operation and performance of a dualchannel, push-button reset timer for possible use in their own circuit application. This EVM contains a precise, space-conscious micro-power solution for system resetting in a very small µSON (1.45 mm × 1 mm) package. This document describes the configuration and set up of the EVM board. 2 Setup This section describes the jumpers, connectors, and switches on the EVM as well as how to properly connect, setup, and use the EVM. 2.1 2.1.1 Input/Output Connector Descriptions J1 – VCC This connector is the input power supply connection. 2.1.2 J2 – GND Return connector for the input power supply. This connector is also connected to J4 in the EVM. 2.1.3 J3 – RST This connector is the open-drain output that pulls up to VPU through a 50-kΩ resistor in the EVM. 2.1.4 J4 – GND Return connector for RST. This connector is also connected to J2 in the EVM. 2.2 2.2.1 Jumpers/Switches JP1 – TS Place a shorting jumper between Pin 2 and Pin 3 (TS GND). In normal operation, this pin should be connected to GND and should not be changed. Switching between time delays should only be done during power off. Connecting TS to VCC is only for factory evaluation and not for normal operation. Table 1 shows the connection for choosing between the two. Table 1. Connector JP1 Time-Delay Selections Short Pins 2.2.2 Time Delay TS (s) TS 1 and 2 VCC 0 2 and 3 GND 7.5 JP2 – VPU This EVM is designed for RST to pull up to either VCC or an external voltage source. Table 2 shows the connections for choosing between the two. If the shorting jumper is removed, an external voltage can be placed on Pin 1. Table 2. Connector JP2 Pull-Up Voltage Selections Short Pins 2 Pull-Up Voltage VPU 1 and 2 VCC Open External Voltage TPS3421EGEVM-156 Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLVU781 – October 2012 Submit Documentation Feedback Operation www.ti.com 2.2.3 JP3 – PB2 This EVM is designed to evaluate performance for a single or dual push-button performance. Table 3 shows the connections for choosing between the two. Table 3. Connector JP3 Push-Button Performance 2.2.4 Short Pins PB2 Push-Button Performance 1 and 2 GND Single Button 2 and 3 S2 Dual Button SW1 – Push-Button Switch 1 This is the push-button input. PB1 and PB2 must be asserted for > Ttimer time to initiate the reset output. 2.2.5 SW2 – Push-Button Switch 2 This is the push-button input. PB1 and PB2 must be asserted for > Ttimer time to initiate the reset output. 2.3 Equipment Setup • • • • • 3 Set a power supply voltage between 1.6 V–6.5 V. Turn the power supply off. Connect the positive voltage lead from the power supply to J1 (VCC). Connect the ground lead from the power supply to J2 (GND). Select the output delay time, Ttimer, by placing a shorting jumper between TS and GND on JP1. Select the desired pull-up voltage by placing a shorting jumper or applying an external voltage on JP2 (VPU). Place a voltmeter across J5 (RST) and J6 (GND). Turn on the power supply and assert PB1 and PB2 as needed to evaluate the TPS3421. Operation This section provides information about the operation of the EVM. 3.1 General Operation The TPS3421 device is a low-current, ultra-small, push-button reset timer IC with long timing set up delay preventing unintended reset from short push-button closures or key presses. This section provides typical performance waveforms for the EVM. Actual performance data can be affected by measurement techniques and environmental variables; therefore, these curves are presented for reference and may differ from actual results obtained by some users. SLVU781 – October 2012 Submit Documentation Feedback TPS3421EGEVM-156 Evaluation Module Copyright © 2012, Texas Instruments Incorporated 3 Board Layout www.ti.com PB1 - 5 V/div PB2 - 5 V/div RST - 5 V/div time - 1 s/div Figure 1. TPS3421EG RST function for TS = GND 4 Board Layout J1 JP1 JP2 S1 TP1 R1 11 R3 C1 R2 J2 U1 J3 TP2 J4 S2 JP3 Figure 2. Assembly Layer 4 TPS3421EGEVM-156 Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLVU781 – October 2012 Submit Documentation Feedback Board Layout www.ti.com Figure 3. Top Layer Routing Figure 4. Bottom Layer Routing SLVU781 – October 2012 Submit Documentation Feedback TPS3421EGEVM-156 Evaluation Module Copyright © 2012, Texas Instruments Incorporated 5 Schematic Schematic JP1 VCC [1] J1 VCC TS 2 1.6 V – 6.5 V GND 3 1 1 VCC 2 5 www.ti.com C1 0.1 µF J2 1 GND VCC [1] 2 R2 49.9 kΩ 2 R1 49.9 kΩ JP2 1 VPU 2 3 TP1 U1 TPS3421EGDRY 3 S1 1 4 2 6 PB1 VCC GND TS PB2 RST R3 49.9 kΩ 4 5 J3 1 1 /RST 2 2 3 TP2 S2 PB2 1 4 GND J4 3 S2 1 2 2 1 GND JP3 Figure 5. TPS3421EGEVM-156 Schematic 6 Bill of Material Table 4. TPS3421EGEVM-156 Bill of Material Count RefDes Value Description Size Part Number MFR 1 C1 0.1 µF Capacitor, ceramic chip, 16 V, X5R, ±10% 0603 STD STD 4 J1-4 PEC02SAAN Header, male 2-pin, 100-mil spacing STD PEC02SAAN PEC02SAAN 2 JP1, JP3 PEC03SAAN Header, male 3-pin, 100-mil spacing STD PEC03SAAN PEC03SAAN 1 JP2 PEC02SAAN Header, male 2-pin, 100-mil spacing 0.100 inch x 2 PEC02SAAN Sullins 3 R1-3 49.9 kΩ Resistor, chip, 1/16W, 1% 0603 STD STD 2 S1-2 KT11P2JM C&K Components 2 TP1-2 1 U1 1 — PCB, 2.2 in × 1.65 in × 0.062 in 3 JP1-2 Shunt, black Switch, SPST, PB momentary, sealed washable TPS3421EGDRY Test point, red, thru-hole color keyed STD 5000 STD IC, dual channel push-button reset timer DRY TPS3421EGDRY TI PWR156 Any 929950-00 3M 100-mil Notes: 1. These assemblies are ESD sensitive, observe ESD precautions. 2. These assemblies must be clean and free from flux and all contaminants. Use of no-clean flux is not acceptable. 3. These assemblies must comply with workmanship standards IPC-A-610 Class 2. 4. Ref designators marked with an asterisk ('**') cannot be substituted. All other components can be substituted with equivalent MFG's components. 6 TPS3421EGEVM-156 Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLVU781 – October 2012 Submit Documentation Feedback Evaluating the TPS3420 using the TPS3421EGEVM-156 Board www.ti.com 7 Evaluating the TPS3420 using the TPS3421EGEVM-156 Board The TPS3420 is a threshold-based version of the TPS3421 (see TPS3420 datasheet, SBVS214). The TPS3420 does not require pull-up resistors at the inputs of PB1 and PB2. 7.1 Modifying the TPS3421EVM-156 Board The following modifications to the TPS3421EVM-156 board can be made to evaluate the TPS3420: • Remove resistors R1 and R2. • Place a shorting jumper between Pin 2 and Pin 3 (TS GND). PB1 - 5 V/div PB2 - 5 V/div RST - 5 V/div time - 1 s/div Figure 6. TPS3420D RST Function for TS = GND SLVU781 – October 2012 Submit Documentation Feedback TPS3421EGEVM-156 Evaluation Module Copyright © 2012, Texas Instruments Incorporated 7 Evaluating the TPS3422 using the TPS3421EVM-156 Board 8 www.ti.com Evaluating the TPS3422 using the TPS3421EVM-156 Board The TPS3422 is a more integrated version of the TPS3421. The TPS3422 does not require pull-up resistors at the inputs of PB1 and PB2. 8.1 Modifying the TPS3421EVM-156 Board The following modifications to the TPS3421EVM-156 board can be made to evaluate the TPS3422: • Remove resistors R1 and R2. • Place a shorting jumper between Pin 2 and Pin 3 (TS GND). • Since Pin 6 is N/C. User can select any option on JP3. PB1 - 5 V/div RST - 5 V/div time - 1 s/div Figure 7. TPS3422EG RST Function for TS = GND 8 TPS3421EGEVM-156 Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLVU781 – October 2012 Submit Documentation Feedback 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. 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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. 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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. 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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. 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