Ordering number : ENN7983
LB8658FN
LB8658PL
Monolithic Digital IC
DSC Motor Driver
Features
• An actuator driver for digital camera is implemented on a single chip.
(1) Supports a constant voltage for the AF H-bridge ×2 : a stepping motor (STM) ×1.
- Constant voltage drive.
- Enables 1 phase, 1-2 phase and 2-phase excitation.
- VC1 and VC2 allow the constant voltage for each channel to be set independently.
(2) Supports a constant current for the shutter H-bridge ×1 : a voice coil motor (VCM) ×1.
- Constant current drive.
- ICH allows current setting for each current carrying direction.
→ Supports current suppression while the shutter is Open.
- A fast charge/discharge circuit allows for stabilization of response speed of the continuous drive mode.
- Allows offsetting of the constant current rising waveform with an external C.
(The external C is not required when an offset is not performed)
→ Prevents current rising variation of coil caused by supply voltage fluctuation.
- Implements regenerative brake logic.
(3) Supports a constant voltage for the iris H-bridge ×1 : a voice coil motor (VCM) ×1.
- Constant voltage drive.
- VC4 allows the independent constant voltage to be set.
(4) Supports a constant voltage for the zoom H-bridge ×1 : a DC motor (DCM) ×1.
- Constant voltage drive.
- VC3 allows the independent constant voltage to be set.
- Built-in short brake.
(5) Supports an open collector output for the photo sensor ×3 : a photo sensor (PR/PI) ×3.
- AFPI and ZMPI are turned ON in synchronization with focus mode and zoom mode, respectively.
- ZMPR can be controlled independently, regardless of mode.
[Actuator applications]
Applications
Focus
Shutter
Iris
Zoom
STM
VCM
VCM
DCM
Continued on next page.
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor assumes no responsibility for equipment failures that result from using products
at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor
products described or contained herein.
92706 / 62504 JO IM No.7983-1/16
LB8658FN, LB8658PL
Continued from preceding page.
• Synchronous actuator driving is possible.
[Table Showing Combinations of Actuators which Can Be Driven Simultaneously]
Focus
Shutter
Iris
Zoom
{
{
When “MD1” not used
{
(6 input ports required)
{
{
{
{
{
{
When “MD1” used
{
(7 input ports required)
{
{
{
{
{
• Parallel control via 7 or 8 input ports (one of which is used to photo sensor control).
• Two power supply systems.
• Supports low voltage drive (1.9V min).
• Low saturation output (Vsat = 0.37Vtyp at IO = 200mA).
• Current dissipation in stand-by state is 0 (zero).
• Built-in overheat protection circuit.
• Small and thin package. VQFN44 (6.0×6.0) for LB8658FN and VQLP40 (5.0×5.0) for LB8658PL.
Specifications
Absolute Maximum Ratings at Ta = 25°C [LB8658PL : Preliminary]
Parameter
Maximum power supply voltage
Maximum applied output voltage
Symbol
Conditions
Ratings
VB1 max
-0.3 to 10.5
VB2 max
-0.3 to 10.5
VOUT max
OUT1, 2, 3, 4, 7, 8, 9, 10
-0.3 to VB1+VF
OUT5, 6
-0.3 to VB2+VF
ZMPR, ZMPI, AFPI
Maximum output current
IOUT max
Maximum applied input voltage
VIN max
Allowable power dissipation
Pd max
Storage temperature
OUT1, 2, 3, 4, 7, 8
600
OUT5, 6, 9, 10
800
V
mA
30
MD1 to 3, IN1 to 5
-0.3 to 10.5
Standard PWB mounting (*1)
[LB8658FN]
1.9
Standard PWB mounting (*2)
[LB8658PL]
1.1
[LB8658FN]
-55 to +150
[LB8658PL]
-55 to +125
-20 to +80
Topr
Tstg
V
-0.3 to 10.5
ZMPR, ZMPI, AFPI
Operating temperature
Unit
V
W
°C
°C
(*1) Standard PWB : 30mm×50mm×0.8mm glass epoxy resin 4-layer PWB
(*2) Standard PWB : 40mm×50mm×0.8mm glass epoxy resin 4-layer PWB
Recommended Operating Range at Ta = 25°C [LB8658PL : Preliminary]
Parameter
Voltage for guarantee of function
Constant-voltage setting range
Constant-current setting range
Constant-voltage setting input range
Constant-current setting input range
Symbol
Conditions
Ratings
VB1 opr
2.2 to 10
VB2 opr
2.2 to 10
VOUT1
OUT1, 2, 3, 4, 7, 8
0 to VB1
VOUT2
OUT5, 6
0 to VB2
IOUT
OUT9, 10
VVC1
VC1, VC2, VC4
0.1 to VB1
VVC2
VC3
0.1 to VB2
VIC
50 to 500
Unit
V
V
mA
V
IC
0.1 to 1.0
V
Input pin “H” voltage
VINH
MD1 to 3, IN1 to 5
1.8 to 10
V
Input pin “L” voltage
VINL
MD1 to 3, IN1 to 5
-0.3 to 0.4
V
No.7983-2/16
LB8658FN, LB8658PL
Electrical Characteristics at Ta = 25°C, VB1 = VB2 = 3V [LB8658PL : Preliminary]
Parameter
Symbol
Ratings
Conditions
min
Current dissipation in stand-by state
VB1 system operation current
typ
Unit
Remarks
µA
1
mA
2
max
ISTB
VB1 = VB2 = 10V
0.1
1.0
IB11
MD1/2/3/IN1/2 = L/L/L/*/*
12
16
IB12
MD1/2/3/IN1/2 = L/L/H/*/*
8
11
IB13
MD1/2/3/IN1/2 = L/H/L/*/*
12
16
IB14
MD1/2/3/IN1/2 = L/H/H/*/*
8
11
IB15
MD1/2/3/IN1/2 = H/*/L/*/*
15
20
IB16
MD1/2/3/IN1/2 = H/*/H/*/*
12
16
IB17
IN3/4 = */*
10
14
VB2 system operation current
IB21
IN3/4 = L/L
0.1
1.0
µA
dissipation
IB22
IN3/4 = L/H or H/L or H/H
8
11
mA
1.52
1.57
1.62
1.47
1.57
1.67
0.37
0.50
dissipation
3
[Constant-voltage driver for AF] (OUT1, OUT2, OUT3, OUT4)
VO11
Output constant-voltage 1
VO12
Output saturation voltage 1
VSAT1
VC1 or VC2 = 0.3V
VC1 or VC2 = VREF×0.3
(partial resistance)
VB1 = 3.0V, IO = 200mA
V
4
V
5
V
6
V
7
V
8
[Constant-Voltage driver for zoom] (OUT5, OUT6)
Output constant-voltage 2
Output saturation voltage 2
VO21
VC3 = 0.3V
1.52
1.57
1.62
VO22
VC3 = VREF×0.3 (partial resistance)
1.47
1.57
1.67
0.44
0.60
VSAT2
VB2 = 3.0V, IO = 300mA
[Constant-voltage driver for iris] (OUT7, OUT8)
Output constant-voltage 3
Output saturation voltage 3
VO31
VC4 = 0.3V
1.52
1.57
1.62
VO32
VC4 = VREF×0.3 (partial resistance)
1.47
1.57
1.67
0.37
0.50
V
9
188
200
212
mA
10
-1
0
+1
%
11
VSAT3
VB1 = 3.0V, IO = 200mA
[Constant-current driver] (OUT9, OUT10)
Output constant-current
Output constant-current/
voltage variation
IO
IOLIN
VB1 = 3.0V, between IM and GND :
1.0Ω, IC = VREF/5
VB1 = 3V to 5V (VB1 = 4V typ),
IO = 200 mA
Output saturation voltage 4
VSAT4
VB1 = 3.0V, IO = 300mA
0.44
0.60
V
12
IC output saturation voltage
VSAT5
VB1 = 3.0V, IO = 1mA
0.12
0.2
V
13
ICH output saturation voltage
VSAT6
VB1 = 3.0V, IO = 1mA
0.1
V
14
VREF
IREF = -1mA
1.00
1.05
V
15
V
16
[Reference voltage circuit] (VREF)
VREF output constant-voltage
0.95
[Photo sensor drive circuit] (ZMPR, ZMPI, AFPI)
Output saturation voltage 7
VSAT7
IO = 10mA
0.3
0.45
IINH
VIN = 5.0V
70
90
µA
17
IINL
VIN = 0V
0
µA
18
200
°C
19
[Input circuit] (MD1 to 3, IN1 to 5)
Control pin input current
[Others]
Overheat protection detection
temperature
TTSD
*Design guarantee
160
180
* Temperature characteristics of design guaranteed, however individual unit testing is not performed.
No.7983-3/16
LB8658FN, LB8658PL
[Remarks]
1) Specifies the IC standby leak current.
2) Specifies the current dissipated at the pin VB1 in each mode. (Specifies the maximum value for each condition.)
3) Specifies the current dissipated at the pin VB2 in each mode. (Specifies the maximum value for each condition.)
4) Specifies the output voltage when the constant voltage is output from pins OUT5 to OUT4.
5) Specifies the output transistor (upper and lower) saturation voltage at pins OUT1 to OUT4
6) Specifies the output voltage when the constant voltage is output from pins OUT5 to OUT6.
7) Specifies the output transistor (upper and lower) saturation voltage at pins OUT5 to OUT6.
8) Specifies the output voltage when the constant voltage is output from pins OUT7 and OUT8.
9) Specifies the output transistor (upper and lower) saturation voltage at pins OUT7 to OUT8.
10) Specifies the output current when the constant current is output from pins OUT9 to OUT10.
11) Specifies the output current variation caused by supply voltage fluctuation when the constant current is output from
pins OUT9 to OUT10.
12) Specifies the output transistor (upper and lower) saturation voltage at pins OUT9 to OUT10.
13) Specifies the saturation voltage of the IC pin discharge transistor.
14) Specifies the saturation voltage of the ICH pin discharge transistor.
15) Specifies the output voltage at VREF.
16) Specifies the saturation voltage of the output transistor at pins ZMPR, ZMPI and AFPI.
17) Specifies the input current when the voltage inputs at pins MD1 to MD3 and IN1 to IN5 is “H”.
18) Specifies the input current when the voltage inputs at pins MD1 to MD3 and IN1 to IN5 is “L”.
19) Specifies the overheat protection circuit detection temperature. (design guaranteed)
Package Dimensions
unit : mm
3293
[LB8658FN]
No.7983-4/16
LB8658FN, LB8658PL
Package Dimensions
unit : mm
3302
[LB8658PL]
SGND
VREF
VC4
VC3
VC2
VC1
VB1
VB2
(NC)
PGND
(NC)
Pin Assignment
44
43
42
41
40
39
38
37
36
35
34
33 (NC)
ICH 1
IC 2
32 OUT5
IN1 3
31 OUT6
IN2 4
30 OUT1
IN3 5
29 OUT2
28 OUT3
LB8658FN
IN4 6
12
13
14
15
16
17
18
19
20
21
22
IMA
PGND
23 OUT10
IMB
(NC) 11
VB1
24 OUT9
FC
(NC) 10
AFPI
25 OUT8
ZMPI
MD3 9
ZMPR
26 OUT7
IN5
MD2 8
(NC)
27 OUT4
(NC)
MD1 7
Top view
ILB01673
No.7983-5/16
SGND
VREF
VC4
VC3
VC2
VC1
VB1
VB2
PGND
(NC)
LB8658FN, LB8658PL
40
39
38
37
36
35
34
33
32
31
ICH 1
30 OUT5
IC 2
29 OUT6
IN1 3
28 OUT1
IN2 4
27 OUT2
IN3 5
26 OUT3
LB8658PL
IN4 6
25 OUT4
MD1 7
24 OUT7
MD2 8
23 OUT8
MD3 9
22 OUT9
(NC) 10
21 OUT10
20
PGND
19
IMA
18
IMB
17
VB1
16
FC
15
AFPI
14
ZMPI
13
ZMPR
12
IN5
(NC)
11
Top view
ILB01674
No.7983-6/16
LB8658FN, LB8658PL
Pin Description
Protection diode
Pin number
Pin name
Description
Upper side
VB1
VB2
Lower side
LB8658FN
LB8658PL
PGND
19, 38
17, 34
SGND
VB1
37
33
VB2
ditto
22, 35
20, 32
PGND
Power system GND
44
40
SGND
Control system GND
20
18
IMB
OUT9 and OUT10 current detection feedback pin
21
19
IMA
OUT9 and OUT10 current detection pin
30
28
OUT1
Motor drive output
{
{
29
27
OUT2
ditto
{
{
28
26
OUT3
ditto
{
{
27
25
OUT4
ditto
{
32
30
OUT5
ditto
{
{
31
29
OUT6
ditto
{
{
26
24
OUT7
ditto
{
{
25
23
OUT8
ditto
{
{
24
22
OUT9
ditto
{
{
23
21
OUT10
ditto
{
{
7
7
MD1
Control signal input
{
8
8
MD2
ditto
{
9
9
MD3
ditto
{
3
3
IN1
ditto
{
4
4
IN2
ditto
{
5
5
IN3
ditto
{
6
6
IN4
ditto
{
14
12
IN5
ditto
{
43
39
VREF
39
35
VC1
40
36
VC2
ditto
{
41
37
VC3
ditto
{
42
38
VC4
ditto
{
18
16
FC
Phase compensation pin
2
2
IC
Constant-current setting reference input
{
1
1
ICH
Constant-current setting switching output
{
15
13
ZMPR
Photo sensor drive output
{
16
14
ZMPI
ditto
{
17
15
AFPI
ditto
{
Battery power supply
{
Reference voltage output
{
Constant-voltage setting reference input
{
{
No.7983-7/16
LB8658FN, LB8658PL
Block Diagram
Note : When the input voltage for IC pin is set with partial resistance from the reference voltage such as VREF,
make sure not to use “VC1”, “VC2”, “VC3” and “VC4”, and partial resistance together.
(In any mode other than shutter mode, the IC pin discharge transistor inside the IC pin switches to ON.)
No.7983-8/16
LB8658FN, LB8658PL
Truth Table
Input
Output
ZM
ZM
AF
PR
PI
PI
VREF
ICH
OFF
-
IC pin
discharge
Mode
MD1 MD2 MD3 IN1 IN2 IN3 IN4 IN5 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 OUT9 OUT10
L
L
L
-
OFF
Stand-by
L
L
-
-
L
H
L
H
H
L
H
L
L
Open
H
H
-
H
-
Regeneration
L
L
-
-
L
H
L
H
H
L
H
L
H
H
-
-
L
L
L
H
H
L
L
H
L
H
L
H
AF only
H
L
H
L
H
L
(2-phase excitation)
H
H
H
L
L
H
L
L
-
-
H
L
L
H
L
H
-
-
AF only
H
L
H
L
-
-
(1-phase excitation)
H
H
-
-
L
H
L
L
L
H
H
L
L
H
L
H
L
H
AF&Iris (1)
H
L
H
L
H
L
(2-phase excitation)
H
H
H
L
L
H
L
L
-
-
H
L
L
H
L
H
-
-
AF&Iris (1)
(1-phase excitation)
Closed
ON
Shutter
H
-
ON
Iris
H
L
H
H
L
L
H
H
L
H
L
H
L
-
-
H
H
-
-
L
H
L
L
L
H
H
L
L
H
L
H
L
H
L
L
H
H
L
AF&Iris (2)
(2-phase excitation)
H
H
L
H
L
H
L
H
H
H
L
L
H
L
L
-
-
H
L
L
H
L
H
-
-
AF&Iris (2)
H
L
H
L
-
-
(1-phase excitation)
H
H
-
-
L
H
L
L
-
-
-
L
H
L
H
L
H
L
H
L
H
H
L
L
Zoom (with brake)
L
-
H
L
PR
No.7983-9/16
LB8658FN, LB8658PL
Internal Equivalent Circuit Diagram (Pin number in the figure applies to LB8658FN)
Pin number
Pin name
LB8658PL
7
7
MD1
8
8
MD2
9
9
MD3
3
3
IN1
4
4
IN2
5
5
IN3
6
6
IN4
Internal equivalent circuit diagram
VB1
65kΩ
LB8658FN
65kΩ
10kΩ
9
10kΩ
80kΩ
3
SGND
14
12
ILB01675
IN5
26kΩ
VB1
65kΩ
80kΩ
14
SGND
39
35
VC1
40
36
VC2
41
37
VC3
42
38
VC4
ILB01676
VB1, 2
300Ω
15kΩ
39 40 41 42
PGND
SGND
VREF
VB1
43
10kΩ
40
10kΩ
43
ILB01677
SGND
ILB01678
Continued on next page.
No.7983-10/16
LB8658FN, LB8658PL
Continued from preceding page.
Pin number
Pin name
LB8658FN
LB8658PL
2
2
Internal equivalent circuit diagram
IC
3kΩ
VB1
300Ω
2
18
16
ILB01679
PGND
SGND
FC
VB1
1kΩ
200Ω
300Ω
30kΩ
PGND
SGND
400Ω
IMA
23
ILB01680
VB1
24
10kΩ
IMB
19
10kΩ
18
21
300Ω
20
400Ω
18
PGND
21
20
ILB01681
Continued on next page.
No.7983-11/16
LB8658FN, LB8658PL
Continued from preceding page.
Pin number
Pin name
LB8658PL
24
22
OUT9
23
21
OUT10
Internal equivalent circuit diagram
VB1
400Ω
LB8658FN
10kΩ
23 24
PGND
21
OUT1
27
OUT2
28
26
OUT3
27
25
OUT4
32
30
OUT5
31
29
OUT6
26
24
OUT7
25
23
OUT8
VB1, 2
25
32
10kΩ
7.5kΩ
30kΩ
28
29
1kΩ
30
ILB01682
1
1
PGND
ILB01683
ICH
VB1
50kΩ
1
PGND
13
ZMPR
16
14
ZMPI
17
15
AFPI
15 16 17
50kΩ
15
ILB01684
SGND
ILB01685
No.7983-12/16
LB8658FN, LB8658PL
Application Design Notes
(1) Constant-voltage setting for OUT1 to OUT8
“H” output voltage for OUT1 and OUT2 can be set by the VC1 pin input voltage.
The setting formula is as follows:
(OUT1/OUT2 output voltage) = (VC1 input voltage) ×5.23
Correspondingly, OUT3 and OUT4 can be set by VC2, OUT5 and OUT6 can be set by VC3, and OUT7
and OUT8 can be set by VC4. The setting formula is as follows:
(OUT3/OUT4 output voltage) = (VC2 input voltage) ×5.23
(OUT5/OUT6 output voltage) = (VC3 input voltage) ×5.23
(OUT7/OUT8 output voltage) = (VC4 input voltage) ×5.23
In addition, if the right side setting of the above formula exceeds the supply voltage (VB), the output
voltage is saturated.
(2) Output pin oscillation prevention capacitor for OUT1 to OUT8 constant-voltage control
For constant-voltage control of OUT1 to OUT8, a capacitor must be placed between OUT pins in order to
prevent oscillation.
Test capacitor values between 0.01µF to 0.1µF and choose a value that does not cause output oscillation problems.
However, for the saturated drive, no oscillation prevention capacitor is necessary.
(3) Constant-current setting of OUT9 and OUT10
Constant-current setting between OUT9 and OUT10 depends on the IC pin input voltage and IMA/IMB pin
connection resistance (current detection resistor). The IMA pin is connected to the GND side of H-bridge and the
IMB pin is connected to the negative input of constant-current control amplifier. The IMA pin and the IMB pin are
short circuited on the PWB to be used. (Short circuit near the current detection resistor is recommended.)
As shown in the block diagram, the output current is controlled so that the IC pin input voltage can be equal to the
voltage generated on the current detection resistor, which is connected between IMA (IMB) and GND.
The formula for output current is as follows:
(Output current) = (IC input pin voltage) ÷ (current detection resistance)
In addition, since the constant-current control block is connected to PGND inside the IC, when the voltage is
supplied to the IC pin with partial resistance, GND side of the resistor must be connected to PGND.
(4) ICH pin
For the application when current is switched between shutter “Close” and “Open”, the ICH pin is used.
The ICH pin is changed to “L” only in “Open” mode (refer to the Truth table). This allows the current for shutter
“Open” to be set (switched) lower than the current for shutter “Close”.
The IC pin input voltage is switched by the combined resistance value which is obtained from resistance connected
to the IC pin (2 resistors between VREF and GND) and a resistor connected to the ICH pin.
(5) Fast charge/discharge circuit for the FC pin
In order to support high speed shutter control (sequential shutter), a built-in fast charge/fast discharge circuit is
implemented in the shutter control block (OUT9 and OUT10).
No.7983-13/16
LB8658FN, LB8658PL
(6) Constant-current rising offset function
IC pin voltage
Rising offset
VB1 is high. (Without IC capacitor)
VB1 is low. (Without IC capacitor)
Coil current
Rising offset coil current
IC discharging
Shutter “Close” operating
ILB01686
The rising waveform of the coil current can be offset by having the external CR network give a slope to the rising
waveform of the voltage input to the IC pin and setting a greater coil time constant to make the slope more gradual.
This ensures stable shutter operation under severe power voltage fluctuations.
Note : When offsetting the rising waveform of the coil current using the IC pin, assume the VB1 voltage that could
be obtained in the absence of the capacitor to the IC pin as the supposed minimum voltage and observe and
confirm the rising waveform of the coil current that flows at that voltage, then determine the capacitance of
the capacitor so as to yield a time constant value that is greater than the one that could produce the
waveform generated at the supposed minimum voltage.
The rising waveform offsetting capacitor is unnecessary if the power voltage supplied is stable or in similar cases
in which the rising waveform offsetting function is not required.
(7) FC pin phase compensation capacitor
The capacitor connected to the FC pin is used for phase compensation of constant-current control between
OUT9 and OUT10.
Test capacitor values between 0.0015µF to 0.033µF and choose a value that does not cause output oscillation
problems. (In particular, when a large-inductance coil is used, it is necessary to provide a margin to a
capacity value.)
Moreover, since the constant-current control block is connected to PGND inside the IC, GND side of the FC pin
capacitor must be connected to PGND.
(Cautions for FC pin capacitor setting)
For the capacitor value setting, set the value by which the output does not oscillate, observing an output voltage
waveform.
In circuit, the FC pin is connected to the output part of the constant-current control amplifier, and an output
transistor drives because the potential of the FC pin rises. That is, since the initial state of the FC pin influences the
output-drive timing, the potential of the FC pin is discharged (fast discharge circuit) inside the IC to a certain level
before the shutter is ON, and the potential of the FC pin is charged (fast charge circuit) inside the IC to a certain
level when a shutter is ON, so that the state of the FC pin during shutter driving can always be constant on this IC.
This allows constant input/output delay time.
However, since the time involved in charge/discharge in the above-mentioned circuit will be long if the capacitor
value setting is too large, the amount of variation in charge/discharge delay time will increase with the variation of
capacitor value (absolute value variation and temperature characteristic).
Moreover, as another negative effect of setting a large value to the capacitor, it is considered that the rising
inclination of coil current is moderate. Although the rising inclination of coil current originally depends on
L component of the coil, if a large value is set to a capacitor and the capacitor time constant increases, the rising
inclination of coil current depends on the value of the capacitor.
For the reasons mentioned above, especially in the applications in which a high-speed shutter drive is required,
both the value by which output does not oscillate and as small a value as possible (0.0015µF to 0.033µF)
must be set to a capacitor which is connected to the FC pin.
No.7983-14/16
LB8658FN, LB8658PL
(8) Shutter drive “Regeneration” mode
The “Regeneration” (MD1/2/3/IN1/2 = L/L/L/H/H) in shutter mode is used to slow the coil current decay.
This mode makes coil current regenerative (Slow-Decay) within the output H-bridge by switching from
“Close” (MD1/2/3/IN1/2 = L/L/L/L/H). (Refer to the following figure.)
(1) “Close” (MD1/2/3/IN1/2 = L/L/L/L/H)
OUT10
(2) “Regeneration” (MD1/2/3/IN1/2 = L/L/L/H/H)
OUT9
OUT10
OUT9
ILB01687
When shutter control is switched from “Stand-by” to “Close” (“Open”), the current rises to the target
constant-current value from the state of output current 0 (zero). However, the output of the constant-current control
amplifier inside the IC is in the full drive state during the above-mentioned “Regeneration” state. Therefore, when
it is switched from “Regeneration” to “Close” (“Open”), the current falls to the target constant-current value from
the state of full drive output.
For that reason, to switch the shutter drive to “Close” (“Open”) from “Regeneration” by constant-current control,
it must be switched to “Stand-by” once before switching to “Close” (“Open”).
The example of drive sequence is shown in the figure below.
Stand-by
Open
Close
Regeneration
Stand-by
Open
IN2
IN1
ILB01688
(9) GND wiring and each power supply line capacitor
Connect PGND (2 places) and SGND near the IC and insert a capacitor to the part nearest the power supply pin for
each power supply.
No.7983-15/16
LB8658FN, LB8658PL
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PS No.7983-16/16