Pentagon Connection
SI-7502
(SLA5011/SLA6503)
5-Phase Stepper Motor Driver ICs
sAbsolute
Maximum Ratings
Part No.
Parameter
Motor supply voltage
Auxiliary supply voltage
Control voltage
Reference voltage
Detection voltage
Power dissipation
Ambient operating temperature
Drain -Source voltage
Drain current
Avalanche energy capability (Single pulse)
Power dissipation
Channel temperature
Storage temperature
Collector-Base voltage
Collector-Emitter voltage
Emitter-Base voltage
Collector current
SLA6503
Collector current (Pulse)
Base current
Power dissipation
Junction temperature
Storage temperature
Symbol
V
CC
V
S
V
b
V
ref
V
RS
P
D
T
OP
V
DSS
I
D
E
AS
P
T
T
ch
T
stg
V
CBO
V
CEO
V
EBO
I
C
I
C (pulse)
I
B
P
T
T
j
T
stg
Ratings
44
15
7
1.5
5
1
0 to +65
60
±5
2
35
150
−40
to +150
−60
−60
−6
−3
−6
−1
35
150
−40
to +150
(T
a
=25°C)
Units
V
V
V
V
V
W
°C
V
A
mJ
W
°C
°C
V
V
V
A
A
A
W
°C
°C
SI-7502
SLA5011
sElectrical
Characteristics
Part No.
Parameter
Symbol
I
CC
I
S
I
b
I
IU-L
, I
IL-L
I
OU
-on
I
OU
-off
V
OL
-on
V
OL
-off
F
V
RS
V
TH
R
e (yts)
R
DS (ON)
C
ISS
C
OSS
V
SD
t
rr
I
CBO
V
CEO
h
FE
V
CE (sat)
min
Limits
typ
max
40
12.5
50
1.6
11
10
1.5
30
1.05
4.0
3.3
0.17
300
160
1.1
150
0.22
Units
mA
mA
mA
mA
mA
µ
A
V
V
kHz
V
V
S
Ω
pF
pF
V
ns
µ
A
V
V
Conditions
V
CC
=42V, V
b
=5.5V
V
S
=12.5V
V
b
=5.5V
V
IU
=V
IL
=0.4V
V
b
=5V, AIU to EIU pin open
V
b
=5V
V
b
=5V, AIL to EIL pin open
V
b
=5V
V
b
=5V
V
b
=5V, V
REF
pin open
V
DS
=10V, I
D
=250
µ
A
V
DS
=10V, I
D
=5A
V
GS
=10V, I
D
=5A
V
DS
=25V, f=1.0MHz,V
GS
=0V
I
SD
=5A
I
SD
=±100mA
V
CB
=−60V
I
C
=−10mA
V
CE
=−4V, I
C
=−3A
I
C
=−3A, I
B
=−6mA
(T
a
=25°C)
Supply current
Input current
SI-7502
Upper drive circuit drive current
Lower drive circuit voltage
Oscillation frequency
Detection voltage
Gate threshold voltage
Forward Transconductance
DC ON-resistance
Input capacitance
Output capacitance
Di forward voltage between source and drain
Di reverse recovery time between source and drain
Collector cut-off current
Collector-emitter voltage
DC current gain
Collector emitter saturation voltage
8
V
S
−1.5
20
0.8
2.0
2.2
SLA5011
1.5
−10
SLA6503
−60
2000
1.5
104
SI-7502
(SLA5011/SLA6503)
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
SI-7502
(SLA5011/SLA6503)
sInternal
Block Diagram (Dotted Line)
Auxiliary power
supply
Control power supply
V
b
V
S
Main power supply
V
CC
Variable current
resistor R
X
Excitation signal
Trigger pulse
generator circuit
SI-7502
SLA6503
Reference
voltage
Level shift
current control
unit
Motor
Comparator
amplifier
SLA5011
Current sense
resistor Rs
sEquivalent
Circuit Diagram
SI-7502
24
20
23
19
16
12
15
11
7
8
27
R17
1
R7
R1
Trigger pulse
generator circuit
R4
R3
R6
R12
−
+
R18
R19
R20
R21
R8
Tr2
Tr3
R9
Tr4
R10
Tr5
R11
Tr6
R22
R13
R23
R14
R24
R15
R25
R16
R26
26
2
R2
4
5
3
R5
Tr1
R27
R28
R29
R30
R31
25
21
22
18
17
13
14
10
6
9
SLA6503
R1
1
R2
12
2
3
4
5
6
7
8
9
10
11
R
1
≅2kΩ
Typ
R
2
≅50Ω
Typ
SLA5011
3
5
7
9
11
2
4
6
8
10
1
12
SI-7502
(SLA5011/SLA6503)
105
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
SI-7502
(SLA5011/SLA6503)
sDiagram
of Standard External Circuit
C
1
C
2
C
3
C
4
R
1
D
i
: 100
µ
F/63V
: 50
µ
F/25V
: 10
µ
F/10V
: 470pF
: 1kΩ
: RK-34 (Sanken)
V
B
(5V)
V
S
(12V)
V
CC
(15~42V)
C
3
+
C
1
+ C
2
+
Excitation signal input
Aiu
Biu
Ciu
Diu
Eiu
Ail
Bil
Cil
Dil
Eil
Active High
7407
1
25
22
17
14
6
26
27
24
23
16
15
7
2
4
6
8
10
2
4
6
8
10
1 12
A
0
3
5
7
9
11
3
5
7
9
11
D
0
E
0
I
O
(typ) = 0.92/R
S
I
OPD
(typ) = (1.3×a−0.01) / Rs
a = Vb×R' / (30000+R')
R' = 5100×Rx / (5100+Rx)
B
0
C
0
7406
SI-7502
21
18
13
10
9
2 3 5
R
X
4
SLA6503
Stepper Motor
20
19
12
11
8
1 12
I
O
R
1
SLA5011
P
D
C
4
R
S
D
i
sExternal
Dimensions
SI-7502
(Unit: mm)
sExternal
Dimensions
SLA6503/SLA5011
31.0
±0.2
24.4
±0.2
16.4
±0.2
(Unit: mm)
8(max)
φ
3.2
±0.15
3.2
±0.15
×
3.8
4.8
±0.2
1.7
±0.1
9.5min (10.4) 16.0
±0.2
2.7
13.0
±0.2
Pin-1 marking
(White dots)
41 (max)
9.9
±0.2
8.5max.
Part No.
Lot No.
Part No.
30 (max)
R
R
3.5
+1
−0.5
Lot No.
Pin 1
1.2
±0.15
12
0.85
+0.2
−0.1
±0.15
1.45
11×P2.54
±0.7
=27.94
±1.0
31.5max.
0.55
+0.2
−0.1
2.2
±0.7
27pin
0.5
+0.15
−0.05
1pin
#
26pin
P1.27
±0.7
×
26=33.02
27pin
0.3
+0.15
−0.05
#
2.54
±0.6
R : 0.3mm
(Note) Dimensions marked with a # indicate dimensions of
lead tip.
1 2 3 4 5 6 7 8 9 10 11 12
106
SI-7502
(SLA5011/SLA6503)
0.8 max
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
SI-7502
(SLA5011/SLA6503)
Application Notes
sDetermining
the Output Current I
O
(Control Current)
The main factors that determine the output current are current
sense resistor R
S
, supply voltage V
b
, and variable current resis-
tor R
X
.
(1) Normal mode
To operate a motor at the maximum current level, set R
X
to
infinity (open).
From Fig. A, when the maximum current ripple is designated
as I
OH
, its value will be,
R
S
V
RSH
Fig. A
I
OH
O
Waveform of output current
Fig. B Output current vs. Current sense resistor
(A)
3
I
OH(max)
=
0.212×V
b
−0.01
Rs
0.169×V
b
−0.03
Rs
V
RSH
can be calculated as follows:
V
RSH
=0.19×V
b
−0.03
(center value) ............................... (2)
From equations (1) and (2), the output current I
OH
can be
calculated as follows:
I
OH
=
1
R
S
(0.19×V
b
×-0.03)
Output current I
OH
I
OH
=
...................................................................... (1)
2
I
OH(min)
=
1
I
OH(max)
(V
b
=5V)
0.5
I
OH(min)
(V
b
=5V)
0.2
1
2
3
4
5
(Ω)
The relationship between I
OH
and R
S
is shown in Fig. B.
(2) Power down mode
When an external resistor R
X
is connected, V
RSH
changes as
shown in Fig. C even when R
S
is retained. Obtain a power
down output current I
OHPD
from Fig. C and equation (1).
Sense voltage V
RSH
Sense resistor Rs
Fig. C Sense voltage vs. Variable current resistor
(V)
1.0
V
RSH (max)
=
7.2×R
X
×V
b
−0.01
152.6+33.8×R
X
6.1×R
X
×V
b
−0.03
152.6+33.8×R
X
V
)
(
b
=
sRelation
between Output Current I
O
(Control
Current) and Motor Winding Current I
OM
The SI-7502 uses the total current control system; therefore,
the output current I
O
is different from the motor winding current.
In a general pentagonal driving system, the current flows as
shown in Figure D. The relation between I
O
and I
OM
is as follows:
I
O
=4×I
OM
With some driving systems, the relation can also be as follows:
I
O
=2×I
OM
0.8
V
RSH (min)
=
5V
)
)
(
0.6
V
SH
R
ax
(m
V
b
=
)
5V
V
R
SH
(m
in
0.4
0.2
0.5
1
2
5
10
20 (KΩ)
Variable current resistor Rx
Fig. D Coil current flow at pentagonal driving
I
OM
I
OM
I
OM
2×I
OM
V
CC
I
OM
2×I
OM
to SI-7502
Sense resistor Rs
4×I
OM
SI-7502
(SLA5011/SLA6503)
107
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
SI-7502
(SLA5011/SLA6503)
sMotor
Connection
The 5-phase stepper motor supports various driving systems
and the motor connection varies depending on the driving sys-
tem used.
Use of the motor with some driving systems may be restricted
by patents. Therefore, be sure to ask the motor manufacturer
about the motor connection and driving system to be used.
sThermal
design
The driver (SLA5011/SLA6503) dissipation varies depending on
a driving system used even if the output currents (control cur-
rent) are the same. Therefore, measure the temperature rise of
the driver under the actual operating conditions to determine
the size of the heatsink.
Figure E shows an SLA5011/SLA6503 derating curve. This de-
rating curve indicates T
j
=150°C; however, when using this de-
vice, allow sufficient margin when selecting a heatsink so that
T
C
≤100°C
(AI FIN temperature on the back of the SLA) is ob-
tained.
Fig. E SLA5011/SLA6503 Derating curve
(W)
15
10
1
0
×
Power dissipation P
T
mm
×
2
00
10
50
×
5
AI
0
×
FI
N
2m
5
m
AI
N0
FI
FIN
N
0
−40
0
50
100
150 (°C)
Ambient temperature Ta
SI-7502
sHandling
Precautions
Refer to the product specifications.
Solvents- Do not use the following solvents:
Substances that can dissolve
the package
Substances that can weaken
the package
Chlorine-based solvents: Trichloroethylene, Trichloroethane, etc.
Aromatic hydrogen compounds: Benzene, Toluene, Xylene, etc.
Keton and Acetone group solvents
Gasoline, Benzine, Kerosene, etc.
108
SI-7502
(SLA5011/SLA6503)
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