DRV201AEVM

User's Guide SLVU935 – June 2013 DRV201A Evaluation Module Texas Instruments DRV201AEVM Figure 1. DRV201AEVM The DRV201AEVM is an evaluation board to assist in evaluating the DRV201A IC as a voice coil motor (VCM) driver for camera auto focus. The device is an advanced voice coil motor driver for camera auto focus. It has an integrated D/A converter for setting the VCM current. VCM current is controlled with a fixed frequency PWM controller or a linear mode driver. Current generation can be selected via I2C register. Device has integrated sense resistor for current regulation and the current can be controlled through I2C. When changing the current in the VCM the lens ringing is compensated with an advanced ringing compensation function. Ringing compensation reduces the needed time for auto focus significantly. The device has also VCM short and open protection functions. The following related documents are available for download through the Texas Instruments web site at http://www.ti.com. 1. DRV201A Voice Coil Motor Driver for Camera Auto Focus (SLVSB25) 2. USB Interface Adapter Evaluation Module (SLLU093) SLVU935 – June 2013 Submit Documentation Feedback DRV201A Evaluation Module Copyright © 2013, Texas Instruments Incorporated 1 www.ti.com 1 2 3 4 5 6 7 2 Contents Introduction .................................................................................................................. 3 1.1 Description .......................................................................................................... 3 1.2 Applications ......................................................................................................... 3 1.3 Features ............................................................................................................. 3 System Overview ........................................................................................................... 4 Hardware Overview ......................................................................................................... 5 3.1 Connectors .......................................................................................................... 5 3.2 Jumpers ............................................................................................................. 6 3.3 Test Points .......................................................................................................... 6 3.4 EVM Operation ..................................................................................................... 6 Software ...................................................................................................................... 7 4.1 Software Installation Instructions ................................................................................. 7 EVM Schematic ............................................................................................................. 9 PCB layout ................................................................................................................. 10 Bill of Materials ............................................................................................................. 12 DRV201A Evaluation Module SLVU935 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Introduction www.ti.com 1 Introduction 1.1 Description The DRV201AEVM is an evaluation board to assist in evaluating the DRV201A IC as a voice coil motor (VCM) driver for camera autofocus. The device is an advanced voice coil motor driver for camera Auto focus. It has integrated D/A converter for setting the VCM current. VCM current is controlled with a fixed frequency PWM controller or a linear mode driver. Current generation can be selected via I2C register. Device has integrated sense resistor for current regulation and the current can be controlled through I2C. When changing the current in the VCM the lens ringing is compensated with an advanced ringing compensation function. Ringing compensation reduces the needed time for auto focus significantly. The device has also VCM short and open protection functions. 1.2 Applications • • 1.3 Camera auto focus Camera Iris control Features • • • • • • • • • • Configurable for linear or PWM mode VCM current generation High efficiency PWM current control for VCM Advanced ringing compensation Integrated 10-bit D/A converter for VCM current control Protection – Open and short-circuit detection on VCM pins – Undervoltage lockout (UVLO) – Thermal shutdown – Open and short circuit protection on VCM output – Internal current limit for VCM driver I2C interface Operating temperature range: -40ºC to 85ºC 6-ball WCSP package with 0.4-mm pitch Max die size: 0.8 mm x 1.48 mm Package height: 0.15 mm SLVU935 – June 2013 Submit Documentation Feedback DRV201A Evaluation Module Copyright © 2013, Texas Instruments Incorporated 3 System Overview 2 www.ti.com System Overview USB-to-I2C Adapter DRV201A EVM Host(PC) Figure 2. System Block Diagram The system consists of these components: • Host (PC): a Windows™ personal computer (PC) – used to configure and monitor the DRV201AEVM. The GUI operates on the host. For the GUI to execute properly, the host needs to have the correct LabView™ RunTime version. If the host doesn’t have the correct RunTime version it will be prompted during GUI installation. More information in GUI installation section. • USB-to-I2C adapter: DRV201AEVM uses the I2C interface for communication with the host. The TIsupplied USB-to-I2C adapter shown in Figure 3. USB-to-GPIO adapter does the appropriate conversion so the host can use the USB interface for communication. USB-to-I2C adapter has a 3.3-V supply rail which is used to supply the EVM so no external power supply is needed. • DRV201AEVM: EVM board that houses the DRV201A and peripheral components. Figure 3. USB-to-GPIO Adapter 4 DRV201A Evaluation Module SLVU935 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Hardware Overview www.ti.com 3 Hardware Overview The DRV201AEVM allows evaluation of the DRV201A IC as a voice coil motor (VCM) driver for camera autofocus. DRV201AEVM has separate connections for Isource and Isink pins that can be used to connect to any VCM actuator or VCM in a camera module. If VCM actuator is not available there are on board mounted inductor and resistor available to model VCM. The DRV201AEVM can be configured and monitored through a Windows GUI application running on a PC. The GUI communicates with the DRV201AEVM through the USB Interface Adapter (included with EVM kit), which acts as an I2C master for the board. The DRV201AEVM provides the following functionality: • Programming of the DRV201A device. • R_VCM and L_VCM are meant as a model of a typical VCM actuator electrical parameters. • Driving either external VCM connected to ISOURCE and ISINK headers or using on board inductor and resistor (see jumper setting). • Standard 400-kHz I2C communication via I2C connector to USB adapter for connection to a PC. • Board can be supplied through the 3.3 V from the USB adapter or from an external power source (see jumper setting). Texas Instruments DRV201AEVM Figure 4. Connecting the ribbon cable to DRV201AEVM pin one is marked on the EVM and with the red stripe in the ribbon cable. 3.1 Connectors The DRV201AEVM has connectors for power and I2C communications. J1 provides a possibility to power EVM from an external power supply (between 2.5 V and 4.8 V). USB adapter interface adapter has a 3.3V power output that can be used to power the board so there is no need for external power source. P1 header provides the I2C communication interface to the DRV201AEVM. The USB Interface Adapter includes a ribbon cable that can be connected to P1. The adapter is connected to a Windows-based PC. SLVU935 – June 2013 Submit Documentation Feedback DRV201A Evaluation Module Copyright © 2013, Texas Instruments Incorporated 5 Hardware Overview www.ti.com WARNING When using external power DRV201AEVM, it should be noted that the recommended supply range for DRV201A is from 2.5 V to 4.8 V. 3.2 Jumpers The DRV201AEVM operation can be configured using jumpers: • Board power from external supply or USB interface adapter • Driving on board inductor and resistor or external VCM actuator See Table 1 for descriptions and default settings for the jumpers on the DRV201AEVM. Table 1. DRV201AEVM Jumpers NUMBER P2 JP1 andJP2 3.3 FUNCTION Board power supply selection. Connect to pins 1-2 when using 3.3 V from the USB interface adapter and pins 2-3 if external power supply is used. R_VCM and L_VCM are connected between DRV201A pins ISOURCE and ISINK. If jumpers are not connected, VCM actuator can be connected between ISOURCE and ISINK. DEFAULT SETTING Pins 1-2 (power from USB interface adapter) JP1 and JP2 jumpers connected Test Points The DRV201AEVM provides test points that can be used for evaluation. Important voltages can be monitored with a meter through the use of the test points. 3.4 EVM Operation The DRV201AEVM operates from either a USB interface adapter (through P1) or an external power supply (through J1). Jumper P2 can be used to select the power source as described in Section 3.2. Use the following steps to set up the DRV201AEVM. 1. Connect the USB interface adapter to the DRV201AEVM P1 connector using the ribbon cable provided. 2. Plug the appropriate end of the USB cable into the adapter and the other end into your PC. NOTE: If using an external power supply, connect jumper’s pins 2-3 and use J1 to connect the power supply. 6 DRV201A Evaluation Module SLVU935 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Software www.ti.com 4 Software The DRV201AEVM comes with a Windows application that can be used to configure and monitor the EVM. The GUI can be used to configure all available options of the EVM such as programming, current settings, ringing compensation, VCM resonance frequency, open VCM, and short VCM. The following section explains the procedure for installing the graphical user interface (GUI) onto a Windows based PC. A USB interface adapter is required to connect the EVM to a PC and should have been provided with the EVM. Additional interfaces can be ordered through http://focus.ti.com/docs/toolsw/folders/print/usb-to-gpio.html. 4.1 Software Installation Instructions To • • • • install the EVM software follow the steps outlined: Copy the DRV201AEVM.zip to your computer and extract all files. Double-click on the setup.exe file in the \Installer\Volume\ directory. Follow the prompts to finish the installation. At the end of the installation, a reboot of your computer may be required. Figure 5. setup.exe File Located in the Volume Directory I2C read/write commands may be made using the provided software. A dark grey block means the bit is ‘high’. A white block means the bit is ‘low’. A write may be performed simply by clicking on an individual bit or an entire register may be written by using the write command on the left side of the GUI. DRV201A Figure 6. DRV201AEVM GUI Main SLVU935 – June 2013 Submit Documentation Feedback DRV201A Evaluation Module Copyright © 2013, Texas Instruments Incorporated 7 Software www.ti.com DRV201A Figure 7. DRV201AEVM GUI Basic 8 DRV201A Evaluation Module SLVU935 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated EVM Schematic www.ti.com 5 EVM Schematic DRV201A SLVU935 – June 2013 Submit Documentation Feedback DRV201A Evaluation Module Copyright © 2013, Texas Instruments Incorporated 9 PCB layout 6 www.ti.com PCB layout Texas Instruments DRV201AEVM Figure 8. DRV201AEVM Board Layer 1. (TOP) 10 DRV201A Evaluation Module SLVU935 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated PCB layout www.ti.com Figure 9. Board Layer 4. (BOTTOM) SLVU935 – June 2013 Submit Documentation Feedback DRV201A Evaluation Module Copyright © 2013, Texas Instruments Incorporated 11 Bill of Materials 7 www.ti.com Bill of Materials Table 2. Bill of Materials 12 Count RefDes Value Description Size Part Number MFR 1 Cin 1 µF Capacitor, Ceramic, 10V, X5R 0402 ECJ0EB1A105M Panasonic 2010 MCR50JZHJ150 Rohm NR4018T101M Taiyo Yuden ED555/2DS On Shore DRV201A TI 1 R_VCM 15 Ω Resistance to model VCM 1 L_LCVM 100 µH Inductance to model VCM 1 J1 Terminal Block 1 P1 Header, 2x5 1 P2 Header, 1x3 2 JP1, JP2 Header, 1x2 4 U1 IC, Autofocus driver 2 x 3.5 mm DRV201A Evaluation Module SLVU935 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated 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. 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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. 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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. 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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. 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