Sanyo EP92H - Manual (Page 16)

Demand for camera cell phones is increasing rapidly not only in Japan, but in most markets around the world as well.
While compact, high image quality cameras are in demand in the cell phone market, there are also increasing desires for high-
level camera functions such as mechanical shutters and autofocus.
SANYO developed even further their motor driver technologies nurtured through years of experience in the digital camera field
and provides these technologies for use in camera cell phones as ultraminiature package motor drivers that require few external
components.
31 30
Ultraminiature Package
Motor Drivers for Cell Phones
■ Camera Cell Phone Driver Lineup
Voice Coil Motor
Stepping Motor
(1-2-phase excitation)
Stepping Motor
(2-phase excitation)
LB1801CL
Comp.IN Comp.IN
PIEZO
(SIDM)
LB1801CL LB1801CL LB1801CL
Comp.IN Comp.IN
LB1938T/CL
800 mA
LB8681CL
Constant Current 1.5 ch
LB1941T/CL
Constant Current
LB8682PL
Constant Current 1 ch + 2 ch
LB1800CL
Comp.IN
LB8686PL
1.5 ch ✕ 2
Focus Zoom
LB1800CL LB1800CL
Comp.IN
LB1800CL
Comp.IN Comp.IN
LV8071LG LV8071LG
Iris diaphragm Shutter
Under development
New product New product
New product
Under development
Saturated control and 1-2 phase excitation drivers
80 k Ω
60 k Ω
80 k Ω
60 k Ω
80 k Ω
60 k Ω
80 k Ω
60 k Ω Stepping motor
VCC
OUT1
OUT2
OUT3
OUT4
GND
IN4
IN3
IN2
IN1
1 µ F
Control block
Thermal shutdown circuit
● Supports an FR position
detection output
● Low saturation voltage output
● Two-phase excitation driver
● Low-voltage drive
Drive is possible from 2.2 V
IN1
VCC
0.2 V
IN2
IN3
GND RFG RFS
Iris Shutter
OUT3 OUT2 OUT1
RF
+
–
CPU
Thermal protection circuit
Constant
current
control amplifier
Reference
voltage
circuit
Logic circuit
1.3 V
Stepping Motor
VCC
OUT1
OUT2
OUT3
OUT4
GND
INM
COMP BIAS
ENA
IN2
IN1
1 µ F
L
R
Control block
Thermal
shutdown circuit
12-pin 2.8 mm Package
Compact Package
ENA STEP M1
PWM H bridge
Focus
Sequence circuit
Motor Driver ICs for Cell Phones
Miniature Driver Series
Lens Driver IC for Cell Phones
LB1906CL
Two-phase excitation motor drivers
New
product
LB1801CL
Constant current driver with H bridge × 1.5 ch
Under
development
LB8683CL
Auto Foucus Piezo actuator
Under
development
LV8071LG
For Auto-Focus Motors
For Auto-Focus Motors
For Shutter and Iris Diaphragm System
For autofocus and zoom
Block diagram
Block diagram
Block diagram
Block diagram