DRV201A Datasheet, PDF (1/25 Pages) Texas Instruments – VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS

DRV201A
www.ti.com
SLVSBN6 – JUNE 2013
VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS
Check for Samples: DRV201A
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
– Undervoltage Lockout (UVLO)
– Thermal Shutdown
– Internal Current Limit for VCM Driver
– 4-kV ESD-HBM
• I²C Interface
• 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 x 1.49 mm
• Max Package Height: 0.3 mm
APPLICATIONS
• Cell Phone Auto Focus
• Digital Still Camera Auto Focus
• Iris and Exposure Control
• 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
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.
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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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 © 2013, Texas Instruments Incorporated