User's Guide SLVU528 – March 2012 DRV201 Evaluation Module Figure 1. DRV201EVM The DRV201EVM is an evaluation board to assist in evaluating the DRV201 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.
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 ..............................................................................
Introduction www.ti.com 1 Introduction 1.1 Description The DRV201EVM is an evaluation board to assist in evaluating the DRV201 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.
System Overview 2 www.ti.com System Overview USB-to-I2C Adapter DRV201 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 DRV201EVM. 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.
Hardware Overview www.ti.com 3 Hardware Overview The DRV201EVM allows evaluation of the DRV201 IC as a voice coil motor (VCM) driver for camera autofocus. DRV201EVM 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 DRV201EVM can be configured and monitored through a Windows GUI application running on a PC.
Hardware Overview 3.1 www.ti.com Connectors The DRV201EVM 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 DRV201EVM. The USB Interface Adapter includes a ribbon cable that can be connected to P1.
Software www.ti.com 4 Software The DRV201EVM 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.
Software www.ti.com Figure 6. DRV201EVM GUI Main Figure 7.
EVM Schematic www.ti.
PCB layout 6 www.ti.com PCB layout Figure 8. DRV201EVM Board Layer 1.
PCB layout www.ti.com Figure 9. Board Layer 4.
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 DRV201 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.
Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit 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. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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.
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.
【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.
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.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
