BU64243GWZ Linear Constant Current VCM Driver ROHM Semiconductor BU64243GWZ Linear Constant Current VCM Driver is intended to drive a voice coil motor (VCM). The BU64243GWZ includes ISRC (intelligent slew rate control) to reduce mechanical ringing, optimizing the camera’s auto focus capabilities. The ROHM BU64243GWZ is ideal for driving VCM actuators and autofocus in mobile camera modules. The device is available in a 0.77mm x 1.30mm x 0.40mm UCSP35L1 package.