A3907 Datasheet, PDF (1/11 Pages) Allegro MicroSystems – Low Voltage Voice Coil Motor Driver

A3907
Low Voltage Voice Coil Motor Driver
Features and Benefits
▪ WLCSP package for minimum footprint
▪ Ramp control circuit
▪ Fixed I²C logic thresholds
▪ 10-bit D-to-A converter
▪ 100 μA resolution
▪ Low voltage I²C serial interface
▪ Low current draw sleep mode-active low
▪ 2.3 to 5.5 V operation
Applications:
▪ Camera focus motor
Description
Designed for linear control of small form factor voice coil
motors, the A3907 is capable of peak output currents to 102 mA
and operating voltages to 5.5 V.
Internal circuit protection includes thermal shutdown with
hysteresis, flyback clamp diode, and undervoltage monitoring
of V_DD.
Package: 6-Bump Chip Scale Package
(suffix CG)
Functional Block Diagram
1.8 V
1.8 kΩ
1.8 kΩ
VDD
SDA
SCL
SLEEPZ
Bandgap
Ref
I2C Serial
Interface
10 Bit DAC
Control
Logic
Timer
2.3 to
5.5V
IOUT
1.2 Ω
GND
A3907-DS, Rev. 1