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

– Undervoltage Lockout (UVLO)

– Thermal Shutdown

– Internal Current Limit for VCM Driver

– 4-kV ESD-HBM

• I2C Interface

• Improved PWM-to-Linear Mode Setting Time vs.

DRV201

• Improved EMC Performance vs. DRV201

• Improved PWM-to-Linear Mode Settling Time vs.

DRV201

• Improved EMC Performance vs. DRV201

• Operating Temperature Range: -40ºC to 85ºC

• 6-Ball WCSP Package With 0.4-mm Pitch

• Max Die Size: 0.806 mm × 1.49 mm

• Max Package Height: 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 DRV201A 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 DRV201A 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.