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Voice Coil Motor Driver comes with I²C serial interface.

November 6, 2007 - Designed for camera auto focus and zoom applications, Model A3904 features 2.4-5.5 V operating voltage range, 127 mA maximum output current, and -40 to +85°C operating temperature range. Output current is programmed via I²C interface in 500 µA increments with clock rates up to 400 kHz, while I2C inputs set internal DAC output voltage used as reference for linear current control using MOSFET output sink transistor.

Related categories: Controls and Controllers

Press Release
Release date: October 4, 2007

Allegro MicroSystems, Inc. Announces New Low Voltage Voice Coil Motor Driver with I2C Interface

High Accuracy Digital Motor Current Control in an Extremely Small Package.

Worcester, MA, October 4, 2007 - Allegro announces the first device in a series of voice coil motor drivers with I2C serial interface designed for camera auto focus and zoom applications. The operating voltage range is 2.4 V to 5.5 V and the maximum output current is 127 mA. Allegro's A3904 internal protection features include thermal shutdown and under voltage lockout. Logic input levels are independent of the supply voltage and the operating temperature range is -40°C to +85°C.

Output current is programmed via the I2C interface in 500 µA increments with clock rates up to 400 kHz. I2C inputs set the internal DAC output voltage used as a reference for linear current control using a MOSFET output sink transistor. A logic low input on the SLEEPZ input will put the A3904 into sleep mode and reduce the supply current to <0.5 µA.

The A3904 is supplied at three levels of packaging: 6-contact DFN package (suffix EW) with thin profile (0.38 mm nominal overall height) and exposed tab for enhanced thermal dissipation, bare die form on wafer (suffix CW), and 6-ball wafer level chip scale (WLCSP) bumped package (suffix CG). All package options are Pb (lead) free. The EW and CW packages are available now. Samples of the CG are currently available and production shipments are expected to begin in December 2007.

Targeted at the consumer, telecommunications, industrial and office automation markets, this new device is priced at $0.57 in quantities of 1,000 and has a 12 week typical lead-time to market.

About Allegro

Allegro MicroSystems, Inc. is leader in developing, manufacturing and marketing high-performance power integrated circuits and integrated Hall-effect magnetic sensors. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worchester, Massachusetts (USA) with design and applications center located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com .

Allegro MicroSystems, Inc.,
115 Northeast Cutoff,
Worcester, MA 01606
United States

Contacts:

Marketing:
Stephanie A. Fennelly Communications Manager
USA
Phone: 508- 854-5363

E-mail this person

Company Information:
Name: Allegro MicroSystems Inc.
Address: 115 N.E. Cutoff, P.O. Box 15036
City: Worcester
State: MA
ZIP: 01615
Country: USA
Phone: 508-853-5000
FAX: 508-853-5049
http://www.allegromicro.com

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