DRV201 Datasheet, PDF (1/17 Pages) Texas Instruments – VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS

DRV201
www.ti.com
SLVSB25 – AUGUST 2011
VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS
Check for Samples: DRV201
FEATURES
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• 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
• I²C Interface
• Operating Temperature Range: -40ºC to 85ºC
• 6-Ball WCSP Package With 0.4-mm Pitch
• Max Die Size: 0.8 mm x 1.48 mm
• Package Height: 0.15 mm
APPLICATIONS
• Cell Phone Auto Focus
• Digital Still Camera Auto Focus
• Iris/Exposure Control
• Security Cameras
• Web and PC Cameras
• Actuator Controls
DESCRIPTION
The DRV201 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 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.
FUNCTIONAL BLOCK DIAGRAM
Cin
VBAT
OSCILLATOR
REFERENCE
POR
10-bit
DAC
DIGITAL
REGISTERS
RINGING
SCL
COMPENSATION
I2C
SDA
GND
ISOURCE
VCM
ISINK
Rsense
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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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated