A3904

更新时间： 2024-09-17 03:16:31

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器电机
页数	文件大小	规格书
9页	258K
描述
Low Voltage Voice Coil Motor Driver

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A3904 数据手册

A3904

Low Voltage Voice Coil Motor Driver

Features and Benefits

▪ Fixed I²C logic thresholds

▪ 8-bit D-to-A converter

Description

The A3904 is a voice coil motor (VCM) driver, with an

I²C-compatibleserialinterface.Designedforcameraautofocus

andzoomapplications,thishighaccuracydigitalICisprovided

in small packages ideal for portable devices. Its operating

voltage range is 2.4 to 5.5 V, and its maximum output current

is 127 mA.

▪ 500 μA resolution

▪ Low voltage I²C serial interface

▪ Low current-draw sleep mode

▪ 2.4 to 5.5 V operation

▪ 2 mm × 1.5 mm, 0.38 mm nominal overall height DFN

▪ 1.1 mm×0.7 mm, 0.5 mm maximum overall height WLCSP Output current is programmed via the I²C interface, in 500 uA

▪ 1.1 mm × 0.7 mm, 0.33 mm nominal overall height bare die increments, with clock rates up to 400 kHz. I²C inputs set the

internal D-to-A converter output voltage that is the reference

for linear current control via a MOSFEToutput sink transistor.

To conserve battery power, a logic low signal on the SLEEPZ

Packages:

input disables the output MOSFET and reduces the supply

current to <0.5 μA.

A3904 internal protection features include thermal shutdown

and undervoltage lockout. Logic input levels are independent

of the supply voltage. The operating temperature range is

–40°C to 85°C.

1.5 mm × 2 mm DFN

(EW package)

1.1 mm × 0.7 mm WLCSP

(CG package)

The A3904 is available at three packaging levels: bare die on

wafer (suffix CW); bumped wafer level chip scale package

(WLCSP) (suffix CG); and complete thin profile (0.38 mm

nominaloverallheight)DFNpackage,withNiAuPd leadframe

plating and an exposed tab for enhanced thermal dissipation

(suffix EW).

Not to scale

Bare die

(CW package)

Functional Block Diagram

2.4 to 5.5 V

1.8 V

VDD

IOUT

I²C

Master

Bandgap

Ref

1.8 kΩ

8 Bit DAC

1.8 kΩ

SDA

SCL

I²C Serial

Interface

2.4 Ω

GND

SLEEPZ

I²C

Slave

PAD

EW only

3904-DS, Rev. 2

12 3 4 5 6 7...9

中文翻译

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