Bipolar Driver IC
SI-7200M
s
Ratings
Absolute
maximum
rating
Type No.
SI-7200M
Supply voltage
(V)
V
CC1
50
V
CC2
10
Output
current
(A)
Io
1.2
Junction
temperature
(°C)
Tj
+125
Operating
ambient
temperature (°C)
Top
–20 to +80
(Ta = 25°C)
Storage
temperature
(°C)
Tstg
–30 to +100
s
Characteristics
Electrical
charac-
teristics
Excitation signal
Power down
Input current
Input voltage
Input
Input voltage
(mA)
current
(V)
(V)
(mA)
V
CC1
V
CC2
I
O
I
O1
I
O2(Power down)
V
IL
(ON) V
IH
(OFF) I
IL
V
PD-L
(OFF) V
PD-H
(ON) I
PD-L
I
PD-H
min typ max min typ max min max min typ max min typ max min max min max max min max min max max max
15
30
40 4.5
5
5.5 200 1000 390 440 490 235 275 315
0
0.5
V
CC2
V
CC2
1.6
–0.4 +2
0
0.4
2
V
CC2
1
2
Supply voltage
(V)
*Output current
(mA)
Trigger pulse
V
CC2
Input
Input
Fre- input
voltage
time
quency current
(V)
(µs)
(kHz) (mA)
Vtrig
Ttrig
Ftrig
I
CC2
min max min typ typ max max
3.5 V
CC2
1.0 2.0 20
25
45
Type No.
SI-7200M
* I
O1
: Measurement conditions shown in the external connection diagram
I
O2
: Measurement conditions shown in the external connection diagram with pin 9 open
s
Block diagram
Auxiliary power
supply V
CC
2
Main power
supply V
CC
1
Trigger pulse
generator
circuit
Reference
voltage
Comparator
amplifier
Current
controller
Power down
Excitation signal
(4-phase)
Power down
M
Excitation signal
amplifier
Counter EMF
canceller
SI-7200M
R
S
s
Equivalent circuit diagram
u
!8
R
1
Q
1
Q
2
R
2
R
3
Q
3
Q
4
R
4
w r
y!2
!7 !5
!3
s
External dimensions
(Unit: mm)
Plastic package
65.0
±0.5
59.0
±0.4
4.5
7.8
±0.3
!0
R
39
R
13
R
9
R
40
R
43
!1
o
R
44
Q
17
i
R
42
R
41
–
+
D
1
Q
9
R
17
Q
13
Q
5
R
29
R
5
R
6
D
2
R
18
Q
10
R
14
R
10
R
22
R
26
–
+
R
15
R
11
Q
11
R
23
R
34
R
36
R
27
I/C2/2
R
38
D
3
R
19
R
7
R
8
D
4
R
20
Q
12
R
16
R
12
30.0
±0.5
2 –
φ
4.5
Type No.
Lot No.
8.6
±1
R
21
R
33
R
35
R
25
D
5
D
6
Q
14
Q
6
R
30
D
7
D
8
Q
15
Q
7
R
31
R
24
Q
16
Q
8
R
32
R
28
7
3.8
P=2.54
21.6
±0.5
21.6
±0.5
1..................................18
0.5
2.5
I/C2/2
R
37
Pin No.
t e
q
: NC
!4 !6
46
SI-7200M
s
External connection diagram
V
CC
-1
18
A
Excitation signal
V
CC-2
V
R
44kΩ
78
42
3
1kΩ
A
A
B
B
Power down
2SA561
3.9kΩ
7
6
12
13
9
10
2
4
17
15
A
B
B
SPM
SI-7200M
11
5
14
R
SB
3
16
I
01
, I
02
measurement conditions
Pin 1 : NC
V
CC–1
= 35V
R
SA
V
CC–2
= 5V
R
SA
, R
SB
= 2.4Ω
SPM : stepper motor
Rating : R = 6.3Ω
L = 15.5mH
at 20°C
*a : Trigger pulse for output current
control
Pulse width : 2
µ
s
Frequency : 20 kHz
V
R
300Ω
6
5
555
a
IS1555
8
Equiva-
lent
1000pF
0.01
µ
F
1kΩ
Power down pin : Active high
Excitation signal pin : Active low
s
Supply voltage and output current
Motor Rm = 3.5Ω/
φ
Lm = 6.6 mH/
φ
Trigger pulse :
Ttrig = 2
µ
s
Ftrig = 20kHz
1.0
Output current Io (A)
Dotted lines indicate
non-trackable 20 kHz
chopping voltage
0.8
0.6
0.4
0.2
Increase in lo due to the
effect of the trigger
pulse width
0
16
20
24
28
32
36
40
Supply voltage V
CC1
(V)
s
Output current and temperature
s
Torque and response frequency
1.0
Motor = 103G – 775 – 1240 V
CC
= 30V l
01
= IA
2.2
Output current Io (A)
Pull-out torque (kg-cm)
0.8
1-
2
1.8
When using motor wiring AC.A.
BC-B (A.B : open)
ph
as
e
ex
c
0.6
AC
BC
ita
1.4
tio
n
0.4
Trigger pulse Ttrig = 2
µ
s Ftrig = 20kHz
1.0
A
A
B
B
0.2
0
20
40
60
80
100
0.6
200
500
1000
5000
Case (aluminum plate) temperature Tc (°C)
Response frequency f (pps)
(Setting)
Motor Rm = 3.5Ω/
φ
Lm = 6.6 mH/
φ
2 phas
e excit
ation
47
SI-7200M
Application Note
s
Determining the output current I
O
(motor coil current)
The output current, I
O
is fixed by the following circuit
elements:
R
S
: Current detection resistor
V
CC-2
: Auxiliary supply voltage
Based on the specifications of SI-7200M, its output
current I
O
can be seen as:
I
O1
(effective value): 390 to 490mA
To compute I
O
when different values are used for R
S
and V
CC-2
, use the approximation formula below or
the graph at the right. The maximum ripple value I
OH
of the output current waveform is within the I
OH(MIN)
~
I
OH(MAX)
range shown by the following formulas:
1
.
(0.247xV
CC-2
–0.03) [A]
I
OH(max)
=
.
R
S
1
.
(0.225xV
CC-2
–0.024) [A]
I
OH(min)
=
.
R
S
To fine-adjust the output current, connect a 20KΩ
variable resistor across pins 8 and 11.
Output current I
OH1
(A)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1
2
3
4
I
OH
I
OH
Output current vs. Current detection resistor
(ma
x)5
V
(min
)5V
Current detection resistor Rs (Ω)
I
OH
0
Waveform of output current
s
Power down mode
The SI-7200M can be operated in power down mode.
By pulling up pin 9 to high level I
O
can be reduced to
60% of the motor rotation current.
Power down output current vs. Current detection resistor
Power down mode output current I
OH2
(A)
1.2
1.0
0.8
0.6
0.4
0.2
0
0
1
2
3
4
I
OH2
(
max)
5V
I
OH2
(m
in)5V
Current detection resistor Rs (Ω)
s
Operating voltage range
The Sl-7200M can be used in applications (low coil
resistance R
L
and high supply voltage V
CC
) where SI-
7200E and SI-7230E cannot be used.
48
SI-7200M
Application Note
s
Thermal design
Procedures for thermal design of SI-7200M are shown below.
(1) As shown in the figure below, the supply current I
CC
and the output
current I
O
are measured at the maximum level of the supply voltage
V
CC
. However, the motor is in holding mode at the 2-phase excitation.
(2) From the above measurements, the internal power dissipation (2-
phase) of the hybrid IC can be obtained through the following formula.
P
D
= V
CC
x I
CC
–2I
O
2
(R
L
+ R
S
)
Where R
L
: Resistance of the motor coil between pins 2 and 4 and pins
15 and 17
Shown in the lower graph is a sample calculation of P
D
vs. I
O
.
(3) The heatsink area corresponding to the ambient temperature can be
obtained from the SI-7200M derating curve shown in the right.
(4) Verify that the temperature of the aluminum base plate of the hybrid IC
or adjacent heatsink is below 85°C (equivalent to max. ambient tem-
perature) when operating under actual load conditions.
Method for measuring the SI-7200M current
14
0
×
10
* For details on thermal design, refer to the tech-
nical data book
SI-7200M
Derating curve
16
SL-7200M
Aluminum heatsink
Using silicone grease
Unit : mm
0
×
10
12
2(
Power dissipation P
D
(W)
/
°C
5.1
10
10
W
)
8
0
×
50
×
2
(6
.5
°C
6
Wi
tho
/W
)
A
18
I
CC
V
CC
1
Excitation signal
(2-phase excitation)
Power down
V
CC-2
V
R
44kΩ
78
42
3
A
A
B
B
7
6
12
13
9
10
2
4
17
15
A
I
O
A
4
ut
he
ats
ink
A
B
B
SPM
2
1kΩ
2SA561
3.9kΩ
SI-7200M
11
5
14
R
SB
3
16
R
SA
V
R
300Ω
6
5
555
a
IS1555
8
Equiva-
lent
0
0
20
40
60
80
1000pF
0.01
µ
F
1kΩ
Ambient temperature Ta (°C)
a : Trigger pulse for controlling the output current
Pulse width : 2
µ
s
Frequency : 20 kHz
SI-7200M Power dissipation vs. Output current
q
w
6
e
7
Power dissipation P
D
/
φ
(W)
5
4
3
2
1
0
0
0.2
0.4
0.6
0.8
1.0
V
CC-1
q
40V
w
30V
e
20V
Motor
6V 5Ω/
φ
14mH/
φ
No load
Output current I
O
(A)
49
SI-7200M, SI-7230M, SI-7115B, SI-7300A,
SI-7330A, SI-7500A and SI-7502
Handling Precautions
(Note: The SI-7502 is applicable for item (2) only.)
For details, refer to the relevant product specifications.
(1) Tightening torque:
The torque to be applied in tightening screws when mounting the IC on a
heatsink should be below 49N•m.
(2) Solvent:
Do not use the following solvents:
Substances that
Chlorine-based solvents
: Trichloroethylene,
dissolve the package
Trichloroethane, etc.
Aromatic hydrogen compounds : Benzene, Toluene,
Xylene, etc.
Ketone and Acetone group solvents
Substances that
weaken the package
(3) Silicone grease:
The silicone grease to be used between the aluminum base plate of the hybrid
IC and the heatsink should be any of the following:
• G-746
• YG6260
• SC102
SHINETSU CHEMICAL INDUSTRIES CO., LTD.
TOSHIBA SILICONE CO., LTD.
DOW CORNING TORAY SILICONE CO., LTD.
Gasoline, Benzine and Kerosene
Please pay sufficient attention in selecting silicone grease since oil in some
grease may penetrate the product, which will result in an extremely short
product life.
Others
• Resistance against radiation
Resistance against radiation was not considered in the development of these ICs
because it is assumed that they will be used in ordinary environment.
54
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