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Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays

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TSZ02201-0K1K0B601860-1-2

© 2016 ROHM Co., Ltd. All rights reserved.

6. Oct.2016 Rev.003

TSZ22111・15・001

www.rohm.com

Bi-directional VCM driver for Auto focus

BU64985GWZ

General Description

The BU64985GWZ is designed to drive Bi-directional

voice coil motors. Additionally the driver is able to source

the output current without the need for a direction control

signal. The driver includes ISRC (intelligent slew rate

control) to reduce mechanical ringing to optimize the

camera’s autofocus capabilities.

Features



1.8V Power Supply



Bi-directional Constant Current Driver



Current Source and Sink Output



10 bit Resolution Current Control





Integrated Current Sense Resistor



Power-on Reset



Thermal Shutdown Protection

Applications



Mobile Camera Module



Bi-directional VCM Actuators

Key Specifications



Power Supply Range:

1.6V to 1.98V



Standby Current:

0µA (Typ)



Internal Resistance:

1.3Ω (Typ)



Master Clock:

400kHz (Typ)



Maximum Output Current:

+60mA, -60mA (Typ)



Temperature Range:

-25°C to +85°C

Packages

W (Typ) x D (Typ) x H (Max)

UCSP30L1A

0.77mm x 1.2mm x 0.33mm

Typical Application Circuit

Figure 1. Typical Application Circuit

VCC

Isource

GND

VCM MTR

SCL

SDA

LOGIC

VREF

Power save

10 bit

DAC

Isink

Current

Sense

OUTPUT

Control_A

POR

TSD

OUTPUT

Control_B

Pre driver

+

-

Direction

Control

&

1.8V

I2C

master

1.8V

0.1 to

10uF

VDD

0.1 to

10µF