1 Features

1• 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

– 4-kV ESD-HBM

• I2C Interface

• Operating Temperature Range: –40ºC to 85ºC

• 6-Ball WCSP Package With 0.4-mm Pitch

• Max Die Size: 0.8 mm × 1.48 mm

• Package Heights:

– YFM: 0.15 mm

– YMB: 0.3 mm

2 Applications

• Cell Phone Auto Focus

• Digital Still Camera Auto Focus

• Iris and Exposure Controls

• Security Cameras

• Web and PC Cameras

• Actuator Controls

3 Description

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.