Datasheet
System Lens Drivers
μ-step
System Lens Driver
for Digital Still Cameras
BU24024GU
●General
Description
BU24024GU 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 7 channels Driver block
1ch-5ch: Voltage control type H-bridge
(Adaptable to STM 2systems)
6,7ch: Current control type H-bridge
Built-in 2 channels PI driving circuit
●Applications
Digital still cameras
●Typical
Application Circuit
●Key
Specifications
Digital Power Supply Voltage:
2.7V to 3.6V
Driver Power Supply Voltage:
2.7V to 5.5V
Output Current (1ch-4ch,6ch,7ch): ±400mA(Max)
Output Current (5ch):
±600mA(Max)
Input Clock Frequency:
1MHz to 27.5MHz
FET ON Resistance (1ch-5ch):
1.5Ω(Typ)
FET ON Resistance (6ch,7ch):
1.1Ω(Typ)
Operating Temperature Range:
-20℃ to +85℃
●Package
VCSP85H3
3.50mm x 3.60mm x 1.00mm
Example1
Photo interrupter
PIOUT1
DVDD
DVSS
PIOUT2
VDDAMP67
MVCC12
MVCC34
MVCC5
OUT5A
OUT5B
5ch
Driver
MGND67
MGND125
MGND34
OUT1A
Logic
1ch
Driver
2ch
Driver
3ch
Driver
FCLK
CSB
SCLK
SDATA
STATE11
STATE21
STATE12
STATE22
IN7A
IN7B
RNF6
OUT6A
OUT6B
6ch
Driver
OUT1B
OUT2A
OUT2B
OUT3A
M
RNF7
OUT7A
OUT7B
7ch
Driver
OUT3B
OUT4A
OUT4B
M
4ch
Driver
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
1/20
TSZ02201-0M2M0BC12030-1-2
18.Apr.2013 Rev.002
BU24024GU
●Pin
Configuration
(Bottom view)
Datasheet
G
RNF7
OUT7B
OUT7A
MGND67
OUT6A
RNF6
F
OUT3A
RNF7
IN7A
VDD
AMP67
RNF6
OUT6B
E
MVCC34
STATE12
STATE11
IN7B
PIOUT2
OUT2B
D
OUT3B
STATE21
SCLK
CSB
DVDD
OUT2A
C
MGND34 STATE22
PIOUT1
FCLK
MVCC12
B
OUT4A
OUT4B
SDATA
DVSS
OUT1A
OUT1B
A
OUT4B
OUT5A
MVCC5
OUT5B
MGND125
OUT1A
1
2
3
4
5
6
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
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TSZ02201-0M2M0BC12030-1-2
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BU24024GU
●Pin
Description
Land
Matrix No.
D5
B4
C5
D4
D3
B3
F3
E4
E3
E2
D2
C2
C4
E5
C6
A5
A6, B5(*)
B6
D6
Pin Name
Power
Supply
-
-
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
-
-
MVCC12
MVCC12
MVCC12
Function
Land
Matrix No.
E6
E1
C1
F1
D1
B1
A1, B2(*)
A3
A2
A4
F4
F5, G6(*)
G4
G5
F6
F2, G1(*)
G3
G2
Pin Name
Power
Supply
MVCC12
-
-
MVCC34
MVCC34
MVCC34
MVCC34
-
MVCC5
MVCC5
-
-
-
RNF6
RNF6
-
RNF7
RNF7
Datasheet
Function
2-channel
driver B output
3-4channel
driver power supply
3-4channel
driver ground
3-channel
driver A output
3-channel
driver B output
4-channel
driver A output
4-channel
driver B output
5-channel
driver power supply
5-channel
driver A output
5-channel
driver B output
Power supply of
6-7channel
current driver control
6-channel
driver power supply
6-7channel
driver ground
6-channel
driver A output
6-channel
driver B output
7-channel
driver power supply
7-channel driver A output
7-channel driver B output
DVDD
DVSS
FCLK
CSB
SCLK
SDATA
IN7A
IN7B
STATE11
STATE12
STATE21
STATE22
PIOUT1
PIOUT2
MVCC12
MGND125
OUT1A
OUT1B
OUT2A
Digital power supply
Digital ground
FCLK logic input
CSB logic input
SCLK logic input
SDATA logic input
IN7A logic input
IN7B logic input
STATE11 logic output
STATE12 logic output
STATE21 logic output
STATE22 logic output
PI driving output1
PI driving output2
1-2channel
driver power supply
1-2, 5channel
driver ground
1-channel driver A output
1-channel driver B output
2-channel driver A output
OUT2B
MVCC34
MGND34
OUT3A
OUT3B
OUT4A
OUT4B
MVCC5
OUT5A
OUT5B
VDDAMP67
RNF6
MGND67
OUT6A
OUT6B
RNF7
OUT7A
OUT7B
(*)It is not possible to use corner pin only (Corner pins are A1, A6, G1 and G6.).
Please short A1-B2, A6-B5, F2-G1, F5-G6 or use B2, B5, F2, F5 only.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
3/20
TSZ02201-0M2M0BC12030-1-2
18.Apr.2013 Rev.002
BU24024GU
●Block
Diagram
Datasheet
DVDD
DVDD
DVDD
DVDD
DVSS
DVDD
DVDD
MVCC12
MVCC12
POR
TSD
LV
DET
PRE-
DRIVER
OUT1A
OUT1B
MVCC5
MVCC5
MGND125
OUT5A
OUT5B
PRE-
DRIVER
MVCC12
MVCC12
MGND125
PRE-
DRIVER
OUT2A
OUT2B
VDDAMP67
SENSE6
RNF6
DVDD
MGND125
Logic
MVCC34
MVCC34
DAC6
OUT6A
OUT6B
PRE-
DRIVER
OUT3A
OUT3B
MGND67
MGND34
MVCC34
SENSE7
RNF7
VDDAMP67
DVDD
PRE-
DRIVER
DAC7
OUT7A
OUT7B
MVCC34
OUT4A
OUT4B
MGND34
MGND67
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/20
TSZ02201-0M2M0BC12030-1-2
18.Apr.2013 Rev.002
BU24024GU
●Description
of Blocks
Stepping Motor Driver (1ch-4ch Driver)
Built-in stepping motor driver of PWM driving type.
Maximum 2 stepping motors 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.
Datasheet
(1)Control
(ⅰ) 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
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.
The state of the rotation command (ACT), state of Cache registers (BUSY), motor operation position (MO) and state of
excitation (MO & ACT) are synchronized with the motor rotation and can be selected to be the output of the STATE pin.
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
ACT
STATEx1
STATEx2
MO
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/20
TSZ02201-0M2M0BC12030-1-2
18.Apr.2013 Rev.002
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