BU64987GWZ Datasheet, PDF (1/25 Pages) Rohm – Bi-directional VCM driver for Auto focus

Bi-directional VCM driver for Auto focus
BU64987GWZ
General Description
The BU64987GWZ 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 drivers include 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
 2-wire Serial Interface (I²C Fm+ compatible)
 Integrated Current Sense Resistor
 Power-on Reset
 Thermal Shutdown Protection
Applications
 Mobile Camera Module
 Bi-directional VCM Actuators
Key Specifications
Power Supply Range:
Standby Current:
Internal Resistance:
Master Clock:
Maximum Output Current:
Temperature Range:
1.6V to 1.98V
0µA (Typ)
1.3Ω (Typ)
400kHz (Typ)
+100mA, -100mA (Typ)
-25°C to +85°C
Packages
UCSP30L1A
W (Typ) x D (Typ) x H (Max)
0.77mm x 1.2mm x 0.33mm
Typical Application Circuit
1.8V
1.8V
VD_VD_CC
0₀.1_.1to_to
1₁0₀µ_uF_F
I2C
master
Power save
VREF
TSD
SCL
Direction
LOGIC
10 bit
DAC
Control
&
SDA
Pre driver
OUTPUT
Control_A
OUTPUT
Control_B
POR
Current
+
Sense
-
GND
Isource
VCM MTR
Isink
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
○This product is not designed protection against radioactive rays
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TSZ02201-0K1H0B601870-1-2
6. Oct.2016 Rev.001