The DRV201 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. The DRV201 device has an 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 also has VCM short and open protection functions.
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