Voice Coil Motor Driver with I2C Serial Interface
Tue, 05/26/2009 - 6:59am
Allegro's new voice coil motor (VCM) driver with I2C serial interface is designed for camera lens auto focus and zoom applications. The operating voltage range for this device is 2.3 to 5.5 V. It has a maximum output current of 102 mA with an operating temperature range of -40°C to +85°C. The output current is programmed via the I2C interface in 100 µA increments. I2C inputs set the internal 10-bit DAC output voltage reference for linear current control using an MOSFET output sink transistor and sense resistor feedback. Input supply current in sleep mode is typically less than 100 nA. Logic input levels are I2C compatible and are independent of VDD.