Datasheet
System Lens Drivers
μ-step
System Lens Driver
for Digital Still Cameras
BU24035GW
●General
Description
BU24035GW is a system Lens Driver that uses
μ-step
driving to make the configuration of the sophisticated,
high precision and low noise lens driver system possible.
This IC has a built-in driver for both DC motor and voice
coil motor and a
μ-step
controller that decreases CPU
power. Therefore, multifunctional lens can be applied.
●Features
Built-in 6 channels Driver block
1ch-4ch: Voltage control type H-bridge
(Adaptable to STM 2systems)
5ch: Voltage / Current control type H-bridge
6ch: Current control type H-bridge
Built-in 2 channels PI driving circuit
Built-in 1 channels Waveforming circuit
Built-in FLL digital servo circuit
Built-in PLL circuit
Built-in STM control circuit : Autonomous control
(cache / updown mode), Clock IN control
●Applications
Digital still cameras
●Typical
Application Circuit
Example1
Photo interrupter
●Key
Specifications
Digital Power Supply Voltage:
Driver Power Supply Voltage:
Output Current (1ch-4ch,6ch):
Output Current (5ch):
Input Clock Frequency:
FET ON Resistance (1ch-4ch):
FET ON Resistance (5ch,6ch):
Operating Temperature Range:
●Package
UCSP75M3
2.7V to 3.6V
2.7V to 5.5V
±500mA(Max)
±600mA(Max)
1MHz to 28MHz
1.5Ω(Typ)
1.0Ω(Typ)
-20℃ to +85℃
3.10mm x 3.10mm x 0.850mm
PIOUT1
PIOUT2
SO
DVDD
DVSS
I
SI
VDDAMP
MVCC12
MVCC34
MGND56
MGND12
MGND34
RNF5
OUT5A
OUT5B
5ch
Driver
Logic
OUT1A
1ch
Driver
2ch
Driver
3ch
Driver
CSB
SCLK
SDATA
STATE11
STATE21
STATE12
STATE22
IN
4ch
Driver
OUT1B
OUT2A
OUT2B
OUT3A
6ch
Driver
OUT3B
OUT4A
OUT4B
M
M
RNF6
OUT6A
OUT6B
TEST
FCLK
Main Host
○Product
structure:Silicon monolithic integrated circuit
.
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© 2013 ROHM Co., Ltd. All rights reserved.
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○This
product is not designed for protection against radioactive rays
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BU24035GW
●Pin
Configuration
(Bottom view)
Datasheet
G
MGND34
OUT4B
OUT4A
MVCC34
OUT3A
OUT3B
RNF6
F
STATE21
MGND34
FCLK
SDATA
CSB
RNF6
OUT6B
E
STATE22
STATE12
STATE11
OUT6A
D
SO
IN
SCLK
MGND56
C
PIOUT2
PIOUT2
VDDAMP
OUT5B
B
OUT1A
PIOUT1
DVSS
DVDD
SI
RNF5
OUT5A
A
TEST
MVCC12
OUT1B
OUT2A
MGND12
OUT2B
RNF5
1
●Pin
Description
Land
Pin Name
Matrix
No.
B4
B3
F3
F5
D6
F4
D2
E6
F1
E2
E1
A1
B2
C1,C2
B5
D1
A2
A5
DVDD
DVSS
FCLK
CSB
SCLK
SDATA
IN
STATE11
STATE21
STATE12
STATE22
TEST
PIOUT1
PIOUT2
SI
SO
MVCC12
MGND12
2
3
4
5
6
Land
Matrix
No.
B1
A3
A4
A6
G4
G1,F2(*)
G5
G6
G3
G2
C6
D7
A7,B6(*)
B7
C7
F6,G7(*)
E7
F7
7
Power
Supply
-
-
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
VDDAMP
DVDD
DVDD
-
-
Function
Digital power supply
ground
FCLK logic input
CSB logic input
SCLK logic input
SDATA logic input
IN logic input
STATE11 logic input/output
STATE21 logic input/output
STATE12 logic output
STATE22 logic output
TEST logic input
PI driving output 1
PI driving output 2
Waveforming input
Waveforming output
1ch, 2ch
Driver power supply
1ch, 2ch Driver ground
Pin Name
OUT1A
OUT1B
OUT2A
OUT2B
MVCC34
MGND34
OUT3A
OUT3B
OUT4A
OUT4B
VDDAMP
MGND56
RNF5
OUT5A
OUT5B
RNF6
OUT6A
OUT6B
Power
Supply
MVCC12
MVCC12
MVCC12
MVCC12
-
-
MVCC34
MVCC34
MVCC34
MVCC34
-
-
-
RNF5
RNF5
-
RNF6
RNF6
Function
1ch Driver A output
1ch Driver B output
2ch Driver A output
2ch Driver B output
3ch, 4ch
Driver power supply
3ch, 4ch Driver ground
3ch Driver A output
3ch Driver B output
4ch Driver A output
4ch Driver B output
5ch, 6ch Power supply of
current driver control
5ch,6ch Driver ground
5ch Driver power supply
5ch Driver A output
5ch Driver B output
6ch Driver power supply
6ch Driver A output
6ch Driver B output
(*)It
is not possible to use corner pin only.(Corner pins are A7, G1, and G7.)
Please short A7-B6, F2-G1, F6-G7 and use it at the same time
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●Block
Diagram
Datasheet
DVDD
VDDAMP
DVDD
MVCC12
DVDD
DVSS
POR
TSD
PRE-
DRIVER
DVDD
DVDD
MVCC12
OUT1A
OUT1B
MGND12
Speed control
Logic
VDDAMP
RNF5
DVDD
PRE-
DRIVER
OUT2A
OUT2B
MVCC12
MVCC12
DAC5
OUT5A
OUT5B
RNF5
PRE-
DRIVER
MGND56
MGND12
Logic
RNF6
VDDAMP
DVDD
MVCC34
MVCC34
PRE-
DRIVER
OUT3A
OUT3B
MGND34
DAC6
OUT6A
OUT6B
MVCC34
MVCC34
MGND56
PRE-
DRIVER
OUT4A
OUT4B
MGND34
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●Description
of Blocks
Stepping Motor Driver (1ch-4ch Driver)
Built-in stepping motor driver of PWM driving type.
Maximum 2 stepping motor can be driven independently.
Built-in voltage feedback circuit of D-class type.
3ch/4ch drivers can also drive independently for DC motor or voice coil motor.
(1) Control
It corresponds to both Clock IN and Autonomous control.
Datasheet
(ⅰ)Clock IN Control
Set the registers for the stepping motor control.
The stepping motor is rotated and synchronized with the input clock in the STATE pin.
It is possible to select the mode of stepping motor control from
μ-step,
1-2 phase excitation, 2 phase excitation and
the number of edge for electrical angle cycle from 4, 8, 32, 64, 128, 256, 512 or 1024.
ON/OFF
Direction
Torque
3
CSB
SCLK
SDATA
SIF
Host
(Speed½Amount)
STATEx1
STM
Control
Logic
SIN wave
Control
Logic
PWM
Control
Logic
H.B.
STM
H.B.
(ⅱ)Autonomous Control
The stepping motor is rotated by setting the registers for the stepping motor control.
It is possible to select the mode of stepping motor control from
μ-step
(1024 portion), 1-2 phase excitation and
2 phase excitation.
ON/OFF
Direction
Speed
Torque
Amount
3
CSB
SCLK
SDATA
SIF
H.B.
STM
Control
Logic
SIN wave
Control
Logic
PWM
Control
Logic
H.B.
STM
Host
MO
STATEx1
BUSY
STATEx2
Cache Method
Built-in Cache registers.
Cache registers enable the setting of subsequent process while the motor is in operation. Through these registers,
operations are done continuously.
Up down method
It is possible to set Up, Constant and Down operation before the motor is operates.
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BU24035GW
●Description
of Blocks
Voltage / Current Driver (5ch Driver)
Built-in voltage driver of PWM driving type / constant current driver.
Built-in digital FLL speed control logic for voltage driver.
Datasheet
(1) Control
(ⅰ)Register Control
■Voltage
Driver (at speed control = OFF)
The PWM drive is executed by the PWM duty ratio, the PWM direction and the PWM ON/OFF which are controlled by
the register settings.
Host
PWM duty
Direction
ON/OFF
3
CSB
SCLK
SDATA
SIF
PWM
Control
Logic
H.B.
M
■Voltage
Driver (at speed control = ON)
The speed control drive is executed by the target speed value, the direction, the coefficient value of PI filter and the
turning ON/OFF which are controlled by the register settings.
The motor speed is adjusted by comparing the target speed with the motor speed detected at the signal of
photo-interrupter.
Target speed
PI filter
Direction
3
ON/OFF
CSB
SCLK
SDATA
Host
SIF
DCM
Speed control
Logic
PWM
Control
Logic
H.B.
DCM
PI Dr
PI
Comp
■Current
Driver
The constant current drive is executed by the output current value, the current direction and the current ON/OFF which
are controlled by the register settings.
Host
Current value
Direction
ON/OFF
3
CSB
SCLK
SDATA
SIF
Control
Logic
Current control
DAC
C.C.
VCM
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© 2013 ROHM Co., Ltd. All rights reserved.
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TSZ02201-0M2M0BC12080-1-2
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