A3907 데이터 시트보기 (PDF) - Allegro MicroSystems

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A3907

Low Voltage Voice Coil Motor Driver

Allegro MicroSystems 

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 VDD.

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

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