DRV8837EVM

User's Guide SLVU749A – June 2012 – Revised August 2012 DRV8837EVM User’s Guide This document is provided with the DRV8837 customer evaluation module (EVM) as a supplement to the DRV8837 (SLVSBA4) datasheet. It details the hardware implementation of the EVM. 1 2 3 Contents PCB (TOP ASSEMBLY VIEW) ............................................................................................ INTRODUCTION ............................................................................................................ 2.1 Power Connectors ................................................................................................. 2.2 Test Points .......................................................................................................... 2.3 Jumpers ............................................................................................................. 2.4 Speed Adjust Potentiometer (R2) ................................................................................ 2.5 Motor Outputs ...................................................................................................... 2.6 Operation of the EVM ............................................................................................. SCHEMATIC AND BILL OF MATERIALS ............................................................................... 2 3 3 3 4 6 7 7 7 List of Figures ............................................................................................ 1 Direction Select (JP1) Jumper 2 Sleep Select (JP2) Jumper ................................................................................................ 5 3 Speed Adjust Potentiometer (R2) ......................................................................................... 6 4 DRV8837EVM Schematic.................................................................................................. 8 SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback DRV8837EVM User’s Guide Copyright © 2012, Texas Instruments Incorporated 4 1 PCB (TOP ASSEMBLY VIEW) www.ti.com 1 PCB (TOP ASSEMBLY VIEW) 2 DRV8837EVM User’s Guide SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated INTRODUCTION www.ti.com 2 INTRODUCTION The DRV8837EVM is a complete solution for evaluating the DRV8837 low voltage brushed DC motor driver. It includes a MSP430 microcontroller that is pre-programmed to take input from an analog potentiometer , for PWM speed control, and a direction jumper, to change motor direction. Power can be provided with the included micro-USB cable for 5 V or externally provided up to 11 V through the power header. To expand beyond the included firmware capability the MSP430 can easily be re-programmed via an external MSP430 USB Stick Development Tool available at www.ti.com/tool/ez430-f2013. Unused pins on the micro-processor are brought out to plated thru holes on the EVM. 2.1 Power Connectors The DRV8837EVM uses a combination of headers and a USB input jack (on bottom side) for the application/monitoring of power. For the EVM, only a single power supply rail is necessary and an onboard 3.3-V regulator provides power to the MSP430 micro and the logic core, VCC, of the DRV8837 motor driver. Minimum recommended Vin for the EVM is 1.8 V and maximum is 11 V. Please see the datasheet for the DRV8837 for complete voltage range information of the driver itself. VM for the DRV8837 is directly taken off the USB jack supply or J1 power supply header. J1 header is located on the top side of the EVM near the bottom center of the board. The USB jack is located on the bottom side of the board. Please choose one method ONLY for providing power to the EVM. As previously mentioned, the MSP430 comes pre-programmed to control basic DC motor operation. If it is desired to change the firmware via the external ez430 development tool, it is not necessary or recommended to provide any input power to the DRV8837EVM. Power is provided from the ez430 board. 2.2 Test Points Test points are provided and labeled for the inputs to the DRV8837 motor driver and also the control signals back to the MCU. The inputs are labeled “IN1” and “IN2”. The control signals to the MCU are labeled as “VSPD” for the analog voltage from the onboard potentiometer and “DIR” for the digital input defining motor direction. Two "GND" test points are also provided. SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback DRV8837EVM User’s Guide Copyright © 2012, Texas Instruments Incorporated 3 INTRODUCTION 2.3 www.ti.com Jumpers There are two jumpers on the EVM that are normally installed. One jumper controls the direction of the DC motor and the other controls the low power state, or sleep state, on the DRV8837. 2.3.1 Direction Select (JP1) Jumper JP1 can be found in Figure 1. Installing the jumper provides a logic LOW signal to a GPIO on the microcontroller. Depending on the motor connections across J4, the motor will spin either counter-clockwise or clockwise. Removing the jumper provides a logic HIGH to the micro-controller and the input polarity of the signals to the DRV8837 is flipped. This will rotate the motor in the opposite direction. Figure 1. Direction Select (JP1) Jumper 4 DRV8837EVM User’s Guide SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated INTRODUCTION www.ti.com 2.3.2 Sleep Select (JP2) Jumper JP2 can be found in Figure 2. Installing the jumper will place the DRV8837 in an ACTIVE state and the motor will spin. Removing the jumper will place the DRV8837 in a low power consumption, or sleep state, and the motor outputs along with internal circuitry will be turned OFF. Figure 2. Sleep Select (JP2) Jumper SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback DRV8837EVM User’s Guide Copyright © 2012, Texas Instruments Incorporated 5 INTRODUCTION 2.4 www.ti.com Speed Adjust Potentiometer (R2) The speed adjust potentiometer can be found in Figure 3. Turning the wheel towards the JP2 jumper will reduce the input PWM duty cycle to the DRV8837 and the motor will turn slower until it stops. Turn the wheel towards the motor outputs and the motor will spin faster. You can also observe the STATUS LED highlighted in the below figure. It will blink faster or slower depending on the PWM commanded to the DRV8837 inputs and proportional to motor speed. Figure 3. Speed Adjust Potentiometer (R2) 6 DRV8837EVM User’s Guide SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated SCHEMATIC AND BILL OF MATERIALS www.ti.com 2.5 Motor Outputs Connect a DC motor across OUT1 and OUT2. Polarity is not critical. 2.6 Operation of the EVM 1. Connect a DC motor across OUT1 and OUT2. 2. Adjust “SPEED ADJUST” potentiometer to minimum voltage by turning all the way towards the JP2 jumper. This will minimize the motor speed. 3. Apply power to J1 header or with external USB cable plugged into a computer USB jack. 4. Adjust SPEED ADJUST potentiometer towards the motor outputs and motor will start to turn. Continue adjusting as desired. 5. To change direction, remove or install the JP1 jumper. CAUTION The motor will be hot when under excessive load or shaft lock. Be careful when handling the motor under these conditions. 3 SCHEMATIC AND BILL OF MATERIALS The following pages contain the DRV8837EVM schematic and bill of materials. SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback DRV8837EVM User’s Guide Copyright © 2012, Texas Instruments Incorporated 7 SCHEMATIC AND BILL OF MATERIALS www.ti.com Figure 4. DRV8837EVM Schematic 8 DRV8837EVM User’s Guide SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated SCHEMATIC AND BILL OF MATERIALS www.ti.com Table 1. DRV8837EVM Bill of Materials Item No. Qty Designator Value DigiKey Part # Manufacturer Part No. Description 1 1 C1 10uF 445-7645-1-ND TDK Corporation C2012X5R1C106 M/0.85 CAP CER 10UF 16V 20% X5R 0805 2 3 C2, C4, C6 .1uF 490-3261-1-ND Murata Electronics North America GRM155R71C104 KA88D CAP CER 0.1UF 16V 10% X7R 0402 3 1 C3 1uF 311-1438-1-ND Yageo CC0402KRX5R5B B105 CAP CER 1UF 6.3V 10% X5R 0402 4 1 C5 1uF 445-4979-1-ND TDK Corporation C1005X5R1C105 M CAP CER 1UF 16V 20% X5R 0402 5 1 D1 LED GREEN 754-1116-1-ND Kingbright Corporation APT1608CGCK LED 1.6X0.8MM 570NM GRN CLR SMD 6 4 J1, J4, JP1, JP2 2-Pin Header 3M9447-ND 3M 961102-6404-AR CONN HEADER VERT SGL 2POS GOLD 7 1 J2 Micro USB AB A97799CT-ND TE Connectivity 1981584-1 CONN RCPT MICRO USB TYPE AB 8 1 J3 4-Pin Socket ED90474-ND Mill-Max Manufacturing Corp 851-43-004-20001000 SOCKET .050" GRID SIP 4 POS R/A 9 1 R1 1K P1.0KJCT-ND Panasonic - ECG ERJ-2GEJ102X RES 1.0K OHM 1/10W 5% 0402 SMD 10 1 R2 10K 3352T-103LF-ND Bourns Inc. 3352T-1-103LF POT 10K OHM THUMBWHEEL CERM ST 11 3 R3, R4, R5 0 311-0.0JRCT-ND Yageo RC0402JR-070RL RES 0.0 OHM 1/16W 0402 SMD 12 1 R6 47K P47KJCT-ND Panasonic - ECG ERJ-2GEJ473X RES 47K OHM 1/10W 5% 0402 SMD 13 1 R7 330 P330JCT-ND Panasonic - ECG ERJ-2GEJ331X RES 330 OHM 1/10W 5% 0402 SMD 14 1 REG1 3.3V 296-18476-1-ND Texas Instruments LP2985-33DBVR IC LDO REG 3.3V 150MA SOT23-5 15 2 SHNT1, SHNT2 Jumper 3M9580-ND 3M 969102-0000-DA SHUNT JUMPER .1" BLACK GOLD 16 6 TP1, TP2, TP3, TP4, TP5, TP6 TP 534-5019 (Mouser) Keystone Electronics 5019 PC TEST POINT MINIATURE SMT 17 1 U1 MCU 296-27472-1-ND Texas Instruments MSP430G2131IRS VALUE LINE MIXED SIGNAL A16R MICROCONTROLLER 18 1 U2 DRV8837 Supplied Texas Instruments Supplied LOW VOLTAGE H-BRIDGE IC 19 1 5V Brushed DC Motor N/A P14355-ND NMB PPN7PA12C1 LOW VOLTAGE DC BRUSHED MOTOR SLVU749A – June 2012 – Revised August 2012 Submit Documentation Feedback DRV8837EVM User’s Guide Copyright © 2012, Texas Instruments Incorporated 9 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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