Unipolar Driver ICs
SI-7300A and SI-7330A
s
Ratings
Absolute
maximum
rating
Type No.
SI-7300A
SI-7330A
Supply voltage
(V)
V
CC1
48
42
V
CC2
8
8
Output
current
(A)
Io
1.7
3.2
Junction
temperature
(°C)
Tj
+125
+125
Operating
ambient
temperature (°C)
Top
–20 to +80
–20 to +80
(Ta = 25°C)
Storage
temperature
(°C)
Tstg
–30 to +100
–30 to +100
s
Characteristics
Electrical
charac-
teristics
Supply voltage
Output current
V
CC2
input
current
Oscillation
frequency
External
zener diode
breakdown
voltage
(V)
V
Z
min
V
CC1
+5
V
CC1
max
70
43
(Ta = 25°C)
Input excitation signal (active high)
Input voltage (V)
High level input current (mA)
Low
High
Io=
Io=
Io=
Io=
level
level
0.5A/ø 1.0A/ø 1.5A/ø 3.0A/ø
(OFF)
(ON)
V
IL
max
0.8
0.3
V
IH
typ
2.8
1.8
l
IH
l
IH
l
IH
l
IH
min max min max min max min max
2.2 10.0 3.0 10.0 4.9 10.0
5
100
15 100 40 100
(V)
V
CC1
Type No.
SI-7300A
SI-7330A
V
CC2
I
O
(mA/ø)
I
OM
*
(mA)
l
CC2
max
45
45
min
19
19
(kHz)
F
typ max
21
21
25
25
min typ max min typ max min max min typ max
15
15
30
30
42 4.5
35 4.5
5
5
5.5 200 1500 535 580 625
5.5 200 3000 535 580 625
* Measurement conditions are as shown in the external connection diagram.
s
Block diagram
SI-7300A
Auxiliary power
supply V
CC
2
Reference
voltage
R
X
Trigger pulse
generator
circuit
Excitation
signal
amplifier
Excitation signal
(4-phase)
Current detection
resistor Rs
Rx : Variable current resistor
Counter EMF
canceller
Comparator
amplifier
Main power
supply V
CC
1
Zener diode for
cancelling counter EMF
ZD
Current
controller
M
s
External connection diagram
SI-7300A
V
CC2
+
2.2µF
10V
9
1
16
15
14
13
8
510Ω×4
A
B
A
B
4
10
6
12 SI-7300A
2
18 16 3 13
9
11
I
O
M measurement conditions
V
CC1
= 30V
V
CC2
= 5V
R
SA
, R
SB
= 1.8Ω
RX : Open
SPM : Rm = 3.6Ω/
φ
: Lm = 9.0mH/
φ
ZD : V
Z
= 60V
1
14
8
15
A
5
7
17
I
O
B
B
A
F.C
SI-7330A
ZD
+
100
µ
F
50V
V
CC1
V
CC2
+
2.2
µ
F
10V
9
16
15
14
13
8
2
10kΩ
82Ωx4
A
B
13
1
16
ZD
A
ZD
B
+
100µF
50V
V
CC1
I
O
A 1
Excitation
signal input
(active low)
11 6
18
2
3
4
I
O
F.C
SPM
Excitation
signal input
(active low)
B 2
A 3
B 4
TD62302P
(Toshiba)
(Open collector)
PD
8
A 9
B
4
A
SI-7330A
12
10
15
I
O
B
7
5
A
10k
Rx
SPM
B
2SC2002
R
SA
R
SB
TD62302P
(Toshiba)
(Open collector)
PD
R
X
17 19 20 14 3
R
SA
R
SB
I
O
M measurement conditions
V
CC1
= 30V
V
CC2
= 5V
R
SA
, R
SB
= 1.8Ω
RX : Open
SPM : Rm = 3.6Ω/
φ
: Lm = 9.0mH/
φ
ZD : V
Z
= 43V
29
SI-7300 and SI-7330A
s
Equivalent circuit diagram
SI-7300A
14
R
1
Q
1
R
2
Q
2
15
30.0
±0.5
s
External dimensions
SI-7300A
65.0
±0.5
59.0
±0.4
2 –
φ
4.5
Type No.
Lot No.
7
(Unit: mm)
Plastic package
7.8
±0.3
17
D
1
16
D
2
8.6
±1
4.5
8
D
7
D
8
D
9
D
10
3.8
P=2.54
21.6
±0.5
21.6
±0.5
•
•
•
•
•
2.5
0.5
11
9
D
3
10
12
13
Q
3
D
4
Q
4
5
7
D
5
Q
5
D
6
6
Q
6
4
3
1
Trigger pulse
generator circuit
Pin No.
1
•
•
•
•
18
SI-7330A
69.0
±0.5
63.0
±0.4
Plastic package
7.0
±0.5
3.5
R
9
Q
7
R
13
R
11
2
R
3
R
7
R
5
+
–
R
8
R
15
R
6
R
4
Q
8
R
14
R
10
35.0
±0.5
16.6
3.4
8.6
±1
+
–
R
12
1.8
Type No.
Lot No.
8.0
φ
3.8
3
P=2.54
0.5
1.4
R
16
18
Pin No.
12
20
s
Supply voltage vs. Output current
SI-7330A
16
Q
10
Q
1
R
26
18
D
1
19
11
10
12
9
13
14
Trigger pulse
generator circuit
SI-7300A
1.6
R
1
R
2
Q
11
Q
2
R
27
15
17
6
D
7
D
8
D
3
Q
3
D
4
Q
4
D
9
D
5
Q
5
D
6
Q
6
4
3
1
R
9
Q
7
R
3
R
7
R
5
R
15
R
11
R
13
+
–
+
–
1.4
1.2
Output current I
O
(A/
φ
)
D
2
1.0
0.8
0.6
0.4
0.2
0
0
20
24
28
32
V
CC2
=5V
Motor 23PM-C108
Rm=3.6Ω/
φ
Lm=9.0mH/
φ
D
10
7
5
8
R
8
R
6
R
4
R
10
Q
8
R
14
R
12
2
36
40
R
16
20
Supply voltage V
CC
(V)
s
Case temperature vs. Output
current
SI-7300A
Output current Io (A)
1.2
1.1
1.0
0.9
0
0
20
40
60
80
100
V
CC1
= 30V V
CC2
= 5V Motor Rm = 3.6
Ω
/
φ
Lm = 9.0mH/
φ
s
Case temperature vs. Chopping
frequency
SI-7300A
Chopping frequency F(KHz)
24
23
22
21
0
0
20
40
60
80
100
V
CC1
= 30V V
CC2
= 5V Motor Rm = 3.6
Ω
/
φ
Lm = 9.0mH/
φ
Case temperature T
C
(°C)
Case temperature Tc (°C)
30
SI-7300 and SI-7330A
Application Note
s
Determining the output
current I
O
(motor coil current)
The output current, lo is fixed by the following circuit ele-
ments:
R
S
: Current detection resistor
V
CC2
: Supply voltage
R
X
: Variable current resistor
To operate a motor at maximum current level, set Rx =
infinity (open). Based on the specifications of SI-7300A, its
output current lo can be seen as:
lo (rms value): 535 to 625 mA
To compute lo when different values are used for Rs and
V
CC2
, use the approximation formula below. The maximum
ripple value I
OH
of the output current waveform can be
computed as follows:
. 1
(0.233•V
CC2
–0.026) [A]
l
OH(max)
=
.
R
S
. 1
(0.214•V
CC2
–0.021) [A]
l
OH(min)
=
.
RS
The graph of this equation is shown below.
s
Power down mode
The SI-7300A can be operated in power down mode. The
circuit is shown below. When transistor Tr is switched on,
the reference voltage drops and the output current can be
decreased.
2
Rx
Tr
SI-7300A
SI-7300A Output current I
OH
vs. Variable current resistor R
X
1.6
1.4
Output current I
OH
(A)
1.2
1.0
0.8
0.6
0.4
0.2
0
0
1
max R
s = 0.
7
Ω
min
s = 1
Ω
max R
min
I
OH
Waveform of output current
SI-7300A Output current I
OH
vs. Current detection resistor Rs
1.6
1.4
3
2
3
Variable current resistor Rx (kΩ)
4
SI-7330A Output current I
OH
vs. Variable current resistor R
X
Rs =
0.3
Ω
Output current I
OH
(A)
1.2
1.0
0.8
0.6
0.4
0.2
0
0
1
2
3
Current detection resistor Rs (Ω)
4
Output current I
OH
(A)
2
Ω
Rs = 0.8
1
1.131
I
OH(max)
1
Rs 4.843+
4.9
V
CC2
– 0.026
Rx
I
OH(min)
1
1.107
Rs 5.165+
5.1
V
CC2
– 0.021
Rx
Rx : kΩ
max
min
V
CC
2
=5
V
0
0
V
CC
2
=5
*
V
1
2
3
Variable current resistor Rx (kΩ)
4
SI-7330A Output current I
OH
vs. Current detection resistor Rs
3
I
OH(max)
1 (0.233V
CC2
–0.026)
Rs
1 (0.214V
CC2
–0.021)
Rs
s
Example of a Frequency vs.
Torque characteristic
The graph shows the relation-
ship between frequency and
pull-out torque of SI-7300A.
SI-7300A Pull-out torque
τ
out
vs. Response frequency
5
I
OH(min)
2
Pull-out torque
τ
out (kg-cm)
Output current I
OH
(A)
4
3
2
23PM-C108
V
CC1
=30V
I
O
=1.2A/
φ
1
(Fixed)
2-phase excitation
V
Z
=60V
Motor
1
0
0
1
2
3
Current detection resistor Rs (Ω)
4
0
500
1000
5000
Response frequency f (pps)
31
SI-7300A and SI-7330A
Application Note
s
Thermal design
The procedures for the thermal design of the SI-7300A are
as follows:
(1) As shown in the right figure, the supply current I
CC1
and
the output current lo are measured at the maximum
level of the supply voltage V
CC1
. However, the motor is
in holding mode at the 2-phase excitation.
(2) From the above measurements, the internal power dis-
sipation (2 phases) of the hybrid IC can be obtained
through the following formula.
Pdiss = V
CC1
• I
CC1
– 2Io
2
(R
L
+ R
S
)
Where R
L
: coil resistance of the motor per phase
Shown in the lower graphs are sample calculations of
Pdiss vs. Io.
(3) The heatsink area corresponding to the ambient tem-
perature can be obtained from the SI-7300A derating
curve shown in the lower right.
(4) Verify that the temperature of the aluminum base plate
of the hybrid IC or adjacent heatsinks is below 85°C
(equivalent to max. ambient temperature) when operat-
ing under actual conditions.
*
For details on thermal design, refer to the technical
data.
Method for measuring current SI-7300A
V
CC2
+
2.2
µ
F
10V
9
1
16
15
14
13
8
510Ω×4
A
B
A
B
4
10
6
1
I
CC1
ZD
8
15
A
A
A
SPM
B
18 16 3 13
9
11
B
V
CC1
A
+
100
µ
F
50V
14
I
O
Excitation
signal input
(Active low)
2
3
4
5
12 SI-7300A 7
17
2
TD62302P
(Toshiba)
(Open collector)
PD
10kΩ
Rx
2SC2002
R
SA
R
SB
SI-7300A Heat dissipation per phase
vs. output current
Heat dissipation per phase Pdiss (W)
9
8
7
SI-7300A Derating curve
SI-7330A Derating curve
30
1
2
3
28
SI-7300A
Aluminium heatsink
Using silicone grease
Unit : mm
25
SI-7300A
Aluminium heatsink
Using silicone grease
Unit : mm
Internal heat dissipation Pdiss (W)
6
5
4
3
2
1
0
0
VCC1
1 40V
2 30V
3 20V
Internal heat dissipation Pdiss (W)
24
10
2
0
×
10
20
0
×
×
2
00
20
20
10
0
×
2
0
×
10
0
×
15
0
×
15
0
×
Motor
φ
3.6Ω/
φ
9.0mH/
No load
Excitation signal
1-phase, holding
mode
2
16
10
2
10
0
×
10
0
×
10
15
0
×
2
0
×
2
0.2 0.4 0.6 0.8 1.0 1.2 1.4
12
10
0
×
5
Output current Io (A/
φ
)
SI-7330A Heat dissipation per phase
vs. output current
Heat dissipation per phase Pdiss (W)
16
14
12
10
8
6
4
2
0
0
0.5
1.0
1.5
2.0
Condition
V
CC2
=5V
1-phase, holding
mode
Motor
Rm=0.85Ω/
φ
Lm=1.45mH/
φ
0
×
10
10
2
0
×
50
×
2
8
No
he
atsi
nk
No
hea
tsin
5
4
k
0
0
20
40
60
80
0
0
20
40
60
80
Ambient temperature Ta (°C)
Ambient temperature Ta (°C)
2.5
3.0
3.5
Output current Io (A/
φ
)
32
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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