Datasheet
Mobile Phone Module Drivers
Uni-directional VCM Driver for Autofocus
BU64982GWZ
General Description
The BU64982GWZ is designed to drive Uni-directional
voice coil motors. The driver includes ISRC (Intelligent
Slew Rate Control) to reduce mechanical ringing to
optimize the camera’s autofocus capabilities.
Key Specifications
Power Supply Voltage:
2.5 V to 3.6 V
Standby Current:
0 µA (Typ)
Output Resistance:
2.8 Ω (Typ)
Master Clock:
2 MHz (Typ)
Output Current:
0 mA to 100 mA, 0 mA to 125 mA
Operating Temperature Range:
-25 °C to +85 °C
Features
Constant Current Driver
10 bit Resolution Current Control
ISRC Mechanical Ringing Compensation
2-wire Serial Interface
(I
2
C FAST-MODE Plus Compatible)
Integrated Current Sense Resistor
Maximum Output Current Selectable
Package
UCSP30L1A(6pin)
W (Typ) x D (Typ) x H (Max)
0.68 mm x 1.08 mm x 0.33 mm
Applications
Mobile Camera
Digital Still Camera
Uni-directional VCM Actuators
Typical Application Circuit
3.0V
C
VDD
VDD
VDD
VREF
TSD
VCM MTR
1.8V
SCL
IC
master
SDA
2
LOGIC
10 bit
DAC
OUT
+
-
POR
GND
〇Product
structure : Silicon integrated circuit
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© 2018 ROHM Co., Ltd. All rights reserved.
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〇This
product has no designed protection against radioactive rays
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BU64982GWZ
Pin Configuration
1
A1Pin
Mark
A
OUT
NC
2
B
GND
SDA
C
VDD
SCL
(TOP VIEW)
Pin Description
Pin No.
A1
A2
B1
B2
C1
C2
Pin Name
OUT
NC
GND
SDA
VDD
SCL
Function
Output current
-
Ground
2-wire serial interface data input
power supply voltage
2-wire serial interface clock input
Block Diagram
VDD
VREF
TSD
OUT
SCL
LOGIC
SDA
10 bit
DAC
+
-
POR
GND
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Absolute Maximum Ratings (Ta = 25 °C)
Parameter
Power Supply Voltage
Control Input Voltage
(Note 1)
Power Dissipation
(Note 2)
Maximum Junction Temperature
Storage Temperature Range
Output Current
(Note 3)
Symbol
V
DD
V
IN
Pd
Tjmax
Tstg
I
OUT
Rating
-0.3 to +4.5
-0.3 to +4.5
0.27
125
-55 to +125
+150
Unit
V
V
W
°C
°C
mA
Caution 1:
Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is
operated over the absolute maximum ratings.
Caution 2:
Should by any chance the maximum junction temperature rating be exceeded the rise in temperature of the chip may result in deterioration of the
properties of the chip. In case of exceeding this absolute maximum rating, design a PCB with power dissipation taken into consideration by increasing
board size and copper area so as not to exceed the maximum junction temperature rating.
(Note 1)
V
IN
is 2-wire serial interface input pins (SCL, SDA).
(Note 2)
UCSP30L1A package. Reduced by 0.27 W/°C when operating above Ta=25 °C (when mounted in ROHM’s standard board).
(Note 3)
Must not exceed Pd, ASO, or Tjmax=125 °C.
Recommended Operating Conditions
Parameter
Power Supply Voltage
Control Input Voltage
(Note 1)
2-wire Serial Interface Frequency
Output Current
(Note 2)
Operating Temperature
Value of VDD Capacitor
(Note 3)
Symbol
V
DD
V
IN
f
CLK
I
OUT
Topr
C
VDD
Rating
Min
2.5
0
0
0
-25
0.5
Typ
-
-
-
100
-
1.0
Max
3.6
3.6
1
125
+85
-
Unit
V
V
MHz
mA
°C
µF
(Note 1)
V
IN
is 2-wire serial interface input pins (SCL, SDA).
(Note 2)
Must not exceed Pd, ASO, or Tjmax=125 °C.
(Note 3)
Ceramic capacitor is recommended. The capacitor value including temperature change, DC bias change, and aging change must be larger than
minimum value.
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Electrical Characteristics
(Unless otherwise specified Ta=25 °C, V
DD
=3.0 V)
Limit
Parameter
Symbol
Min
Power Consumption
Standby Current
Circuit Current
Control Input (V
IN
= SCL, SDA)
High Level Input Voltage
Low Level Input Voltage
Low Level Output Voltage
High Level Input Current
Low Level Input Current
Master Clock
MCLK Accuracy
-
-3
-
+3
%
2 MHz (Typ)
V
INH
V
INL
V
INOL
I
INH
I
INL
1.5
0
-
-5
-5
-
-
-
-
-
3.6
0.5
0.3
+5
+5
V
V
V
µA
µA
I
IN
= +3 mA (SDA)
Input Voltage = 0.9 x V
IN
Input Voltage = 0.1 x V
IN
I
CCST
I
CC
-
-
0.0
0.45
3.0
1.0
µA
mA
PS bit = 0, EN bit = 0
PS bit = 1, EN bit = 0
Typ
Max
Unit
Conditions
10 Bit D/A Converter (for Control Output Current)
Resolution
Differential Nonlinearity
Integral Nonlinearity
Output Current Performance
Output Reference Current
Output Resistance
I
OREF
R
OUT
95
-
100
2.8
105
3.8
mA
Ω
Target position DAC Code
= 0x3FF
-
-
-
-
-1
-4
10
-
-
-
+1
+4
bits
LSB
LSB
Target position DAC Code
= 0x32 to 0x3CD
Target position DAC Code
= 0x32 to 0x3CD
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Timing Chart
VDD
t
RESET
t
OFF
2-wire serial data
Parameter
Time from VDD Rise to First Serial Command
Time Delay of Last Serial Command to VDD Fall
Symbol
t
RESET
t
OFF
Min
1.0
0.0
Typ
-
-
Max
-
-
Unit
ms
ms
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© 2018 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
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