VBAT

ISOURCE

Cin

SCL

SDA

VCM

10-bit

DAC

I2C

REGISTERS

RINGING

COMPENSATION

REFERENCE

POR

DIGITAL

ISINK

GND

OSCILLATOR

Rsense

DRV201A

www.ti.com

SLVSBN6 – JUNE 2013

VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS

Check for Samples: DRV201A

1

FEATURES

•

Configurable for Linear or PWM Mode VCM

•

Improved PWM-to-Linear Mode Settling Time

Current Generation

vs. DRV201

•

High Efficiency PWM Current Control for VCM

•

Improved EMC Performance vs. DRV201

•

Advanced Ringing Compensation

•

Operating Temperature Range: -40ºC to 85ºC

•

Integrated 10-bit D/A Converter for VCM

•

6-Ball WCSP Package With 0.4-mm Pitch

Current Control

•

Max Die Size: 0.806 mm x 1.49 mm

•

Protection

•

Max Package Height: 0.3 mm

–

Open and Short-Circuit Detection

APPLICATIONS

–

Undervoltage Lockout (UVLO)

•

Cell Phone Auto Focus

–

Thermal Shutdown

•

Digital Still Camera Auto Focus

–

Internal Current Limit for VCM Driver

•

Iris and Exposure Control

–

4-kV ESD-HBM

•

Security Cameras

•

•

Web and PC Cameras

•

Actuator Controls

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

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.

FUNCTIONAL BLOCK DIAGRAM

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.