SANKEN SI

Bipolar Driver IC
SI-7200M
■ Ratings
(Ta = 25°C)
Absolute
maximum
rating
Supply voltage
Output
current
(A)
(V)
Junction
temperature
(°C)
Operating
ambient
temperature (°C)
Storage
temperature
(°C)
Type No.
VCC1
V CC2
Io
Tj
Top
Tstg
SI-7200M
50
10
1.2
+125
–20 to +80
–30 to +100
■ Characteristics
Electrical
characteristics
Supply voltage
(V)
Type No.
Excitation signal
Power down
Input current
Input voltage
Input
Input voltage
(mA)
current
(V)
(V)
(mA)
VCC1
V CC2
IO
I O1
I O2(Power down) V IL(ON) VIH(OFF) IIL VPD-L(OFF) V PD-H(ON) IPD-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
SI-7200M
15
30
40 4.5
5
*Output current
(mA)
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
VCC2 1
2
Trigger pulse
VCC2
Input
Input
Fre- input
voltage
time
quency current
(V)
(µs)
(kHz) (mA)
Vtrig
Ttrig
Ftrig
ICC2
min max min typ typ max max
3.5 VCC2 1.0 2.0 20
25
45
* IO1 : Measurement conditions shown in the external connection diagram
IO2 : Measurement conditions shown in the external connection diagram with pin 9 open
■ Block diagram
Auxiliary power
supply VCC2
Trigger pulse
generator
circuit
Power down
Reference
voltage
Main power
supply VCC1
Comparator
amplifier
Current
controller
M
Power down
Excitation signal
(4-phase)
Excitation signal
amplifier
Counter EMF
canceller
SI-7200M
RS
■ External dimensions
■ Equivalent circuit diagram
u
w r
y!2
!7 !5
!3
(Unit: mm)
Plastic package
!8
R1 Q1
Q2 R2
R3 Q3
65.0±0.5
Q4 R4
7.8±0.3
R21
R33
R35 R25
R40
R43
R42
!1
o
R44
Q17
i
R41
–
+
Q13 Q5
R29
R5 R6
R18
D5 D6
46
Q10
Q14
Q6
R30
R14
R10
I/C2/2
R37
R15
R11 Q11
R23
R34
R36 R27
R22
R26
–
+
D3
R7 R8
R19
D7 D8
Q15
Q7
R31
R16
D4
R20
Q12
R12
R24
Q16
Q8
R32 R28
2 – φ 4.5
Type No.
Lot No.
3.8
P=2.54
21.6±0.5
I/C2/2
Pin No.
R38
t e
q : NC
D2
7
R9
D1
Q9 R17
8.6±1
R13
R39
30.0±0.5
!0
4.5
59.0±0.4
!4 !6
21.6±0.5
1..................................18
0.5
2.5
SI-7200M
■ External connection diagram
VCC-1
18
A
A
B
B
Excitation signal
7
6
12
13
9
10
Power down
VCC-2
1kΩ
VR44kΩ
78
42
555
VR 300Ω
4
A
17
B
5
11
5
1kΩ
14
IS1555
RSB
8
0.01µF
SPM
B
15
a
3
Equiva6 lent
1000pF
A
SI-7200M
2SA561
3.9kΩ
2
3
16
Power down pin : Active high
Excitation signal pin : Active low
I01, I02 measurement conditions
Pin 1 : NC
VCC–1 = 35V
RSA VCC–2 = 5V
RSA, RSB = 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 µs
Frequency : 20 kHz
■ Supply voltage and output current
= 2µs
Motor Rm = 3.5Ω/φ Lm = 6.6 mH/φ Trigger pulse : Ttrig
Ftrig = 20kHz
Output current Io (A)
1.0
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 VCC1 (V)
Motor Rm = 3.5Ω/φ Lm = 6.6 mH/φ
1.0
Motor = 103G – 775 – 1240 VCC = 30V l01 = IA
0.8
0.6
Trigger pulse Ttrig = 2µs Ftrig = 20kHz
0.2
0
20
40
60
80
100
Case (aluminum plate) temperature Tc (°C)
2
When using motor wiring AC.A.
BC-B (A.B : open)
AC
BC
1.4
1.0
A
0.6
200
ph
as
e
ex
cit
at
ion
A
500
B
B
1000
ation
0.4
1-
1.8
e excit
Pull-out torque (kg-cm)
2.2
2 phas
Output current Io (A)
■ Torque and response frequency
(Setting)
■ Output current and temperature
5000
Response frequency f (pps)
47
SI-7200M
Application Note
■ Determining the output current IO (motor coil current)
The output current, I O is fixed by the following circuit
elements:
RS : Current detection resistor
VCC-2 : Auxiliary supply voltage
Output current vs. Current detection resistor
Based on the specifications of SI-7200M, its output
current IO can be seen as:
1.4
To compute IO when different values are used for RS
and V CC-2 , use the approximation formula below or
the graph at the right. The maximum ripple value IOH
of the output current waveform is within the I OH(MIN) ~
IOH(MAX) range shown by the following formulas:
1
.
(0.247xVCC-2–0.03) [A]
IOH(max) =.
RS
1
.
(0.225xVCC-2–0.024) [A]
IOH(min) =.
RS
To fine-adjust the output current, connect a 20KΩ
variable resistor across pins 8 and 11.
Output current IOH1 (A)
IO1 (effective value): 390 to 490mA
1.2
1.0
0.8
IOH
0.6
(ma
x)5
IOH
0.4
V
(min
)5V
0.2
0
1
2
3
4
Current detection resistor Rs (Ω)
IOH
0
Waveform of output current
■ Power down mode
Power down output current vs. Current detection resistor
Power down mode output current IOH2 (A)
The SI-7200M can be operated in power down mode.
By pulling up pin 9 to high level IO can be reduced to
60% of the motor rotation current.
1.2
1.0
0.8
0.6
0.4
IOH2 (m
ax)5V
IOH2 (m
0.2
in)5V
0
0
1
2
3
Current detection resistor Rs (Ω)
■ Operating voltage range
The Sl-7200M can be used in applications (low coil
resistance RL and high supply voltage VCC) where SI7200E and SI-7230E cannot be used.
48
4
SI-7200M
Application Note
■ Thermal design
Procedures for thermal design of SI-7200M are shown below.
(1) As shown in the figure below, the supply current ICC and the output
current I O are measured at the maximum level of the supply voltage
VCC. However, the motor is in holding mode at the 2-phase excitation.
* For details on thermal design, refer to the technical data book
SI-7200M
(2) From the above measurements, the internal power dissipation (2phase) of the hybrid IC can be obtained through the following formula.
Derating curve
SL-7200M
Aluminum heatsink
Using silicone grease
Unit : mm
16
2
PD = VCC x ICC –2I O (R L + RS)
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 PD vs. IO.
1kΩ
VR44kΩ
78
42
555
VR 300Ω
3
Equiva6 lent
1kΩ
1000pF
0.01µF
A
Power dissipation PD (W)
×
50
A
B
SPM
(6
°C
/W
)
tho
4
2
6
4
A
×
.5
Wi
IO
17
ut
he
ats
ink
2
B
15
a
0
5
11
5
0
SI-7200M
2SA561
3.9kΩ
2
10
8
VCC1
14
IS1555
RSB
8
3
0
20
40
60
80
Ambient temperature Ta (°C)
RSA
16
a : Trigger pulse for controlling the output current
Pulse width : 2µs
Frequency : 20 kHz
SI-7200M Power dissipation vs. Output current
q
7
w
e
6
Power dissipation PD/φ (W)
VCC-2
7
6
12
13
9
10
)
Excitation signal A
A
(2-phase excitation) B
B
Power down
10
W
18
/
°C
5.1
A
ICC
12
2(
Method for measuring the SI-7200M current
0×
10
(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 temperature) when operating under actual load conditions.
0×
10
(3) The heatsink area corresponding to the ambient temperature can be
obtained from the SI-7200M derating curve shown in the right.
14
5
4
3
VCC-1 q 40V
w 30V
e 20V
Motor
6V 5Ω/φ
14mH/φ
No load
2
1
0
0
0.2
0.4
0.6
0.8
1.0
Output current IO (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
Gasoline, Benzine and Kerosene
(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
SHINETSU CHEMICAL INDUSTRIES CO., LTD.
• YG6260
TOSHIBA SILICONE CO., LTD.
• SC102
DOW CORNING TORAY SILICONE CO., LTD.
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