SLA7027 [SANKEN]
2-Phase Stepper Motor Unipolar Driver ICs; 2相步进电机单极驱动器IC
| 型号： | SLA7027 |
| 厂家： | 
SANKEN ELECTRIC |
| 描述： | 2-Phase Stepper Motor Unipolar Driver ICs |
| 文件： | 总7页 (文件大小：77K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
2-Phase/1-2 Phase Excitation
SLA7027MU/SLA7024M/SLA7026M
2-Phase Stepper Motor Unipolar Driver ICs
■Absolute Maximum Ratings
(Ta=25°C)
Ratings
Parameter
Symbol
Units
SLA7027MU
SLA7024M
SLA7026M
Motor supply voltage
FET Drain-Source voltage
Control supply voltage
TTL input voltage
V
CC
46
V
V
V
DSS
100
V
S
46
V
V
IN
7
V
Reference voltage
Output current
V
REF
2
1.5
V
I
O
1
3
A
P
D1
4.5 (Without Heatsink)
W
W
°C
°C
Power dissipation
PD2
35 (T =25°C)
C
Channel temperature
Storage temperature
Tch
+150
Tstg
−40 to +150
■Electrical Characteristics
Ratings
SLA7024M
typ
Parameter
Symbol
SLA7027MU
SLA7026M
Units
min
typ
max
15
min
max
15
min
typ
max
15
IS
10
10
10
Control supply current
Control supply voltage
FET Drain-Source voltage
mA
V
Condition
VS
=44V
24
VS=44V
VS
=44V
24
VS
10
44
10
24
44
10
44
VDSS
100
100
100
V
Condition
VS
=44V, IDSS=250µA
VS
=44V, IDSS=250µA
V =44V, IDSS=250µA
S
V
DS
0.85
4
0.6
4
0.85
4
FET ON voltage
V
mA
V
Condition
I
D
=1A, AV
S
=14V
I
D
=1A, V
S
=14V
I
D
=3A, V =14V
S
I
DSS
FET drain leakage current
FET diode forward voltage
Condition
V
DSS=100V, V
S
=44V
V
DSS=100V, V
S=44V
V
DSS=100V, V =44V
S
VSD
1.2
40
1.1
40
2.3
40
Condition
I
D
=1A
I
D
=1A
ID=3A
I
IH
µA
mA
Condition
V
IH=2.4V, V
S
=44V
VIH=2.4V, V
S
=44V
VIH=2.4V, V =44V
S
TTL input current
I
IL
−0.8
−0.8
−0.8
Condition
V
IL=0.4V, V
S
=44V
VIL=0.4V, V
S=44V
V
IL=0.4V, V =44V
S
V
IH
2
2
2
2
2
2
TTL input voltage
(Active High)
Condition
I
D
=1A
I
D
=1A
I =3A
D
V
V
V
IL
0.8
0.8
0.8
0.8
0.8
Condition
V
DSS=100V
DSS=100V
V
DSS=100V
DSS=100V
V
DSS=100V
DSS=100V
V
IH
TTL input voltage
(Active Low)
Condition
V
V
V
V
IL
0.8
Condition
I
D
=1A
0.5
=24V, I
0.7
I
D
=1A
I
D
=3A
0.5
=24V, I
0.7
Tr
0.5
Condition
V
S
D
=0.8A
=0.8A
=0.8A
V
S
=24V, I
0.7
D
D
D
=1A
=1A
=1A
V
V
V
S
D
D
D
=1A
=1A
=1A
Tstg
Switching time
µs
Condition
V
S
=24V, I
D
VS
=24V, I
0.1
S
=24V, I
Tf
0.1
0.1
Condition
V
S
=24V, I
D
VS
=24V, I
S
=24V, I
SLA7027MU/SLA7024M/SLA7026M
20
2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)
SLA7027MU/SLA7024M/SLA7026M
■Internal Block Diagram
8
1
6
5
7
12
17
16
18 11
1, 8, 11, 18pin
Reg
Reg
Description of pins
Excitation input
Active H
OUTA
Active L
OUTA
OUTA
OUTB
OUTB
Pin 1
Pin 8
OUTA
+
–
+
–
+
–
+
–
Pin 11
Pin 18
OUTB
OUTB
9
4
2
3
14
13
15
10
■Diagram of Standard External Circuit(Recommended Circuit Constants)
Active High
VCC (46V max)
Excitation signal time chart
2-phase excitation
+
r1 : 510Ω
r2 : 100Ω (VR)
r3 : 47kΩ
r4 : 47kΩ
r5 : 2.4kΩ
clock
INA
0
H
L
1
L
2
L
3
H
L
0
H
L
1
L
INA
H
H
L
H
L
H
H
L
INB
H
L
L
H
L
Vb (5V)
r6 : 2.4kΩ
C1 : 470pF
7
12
8
1
18
11
INB
H
H
VSA VSB OUTA OUTAOUTB OUTB
C2 : 470pF
C3 : 2200pF
C4 : 2200pF
Rs : 1Ω typ(7024M)
(1 to 2W) 0.68Ω typ(7026M)
1.8Ω typ(7027MU)
r1
6
r3
r4
INA
INA
INA
INB
INB
SLA7024M
5
INA
2
Active
High
TdA
7026M
17
16
TdB
INB
13
7027MU
C1
C2
INB
GB
15
1-2 phase excitation
RSA REFA REFB RSB
GA
4
r2
9
3 14
10
clock
INA
0
H
L
L
L
1
H
L
2
L
L
H
L
3
L
4
L
H
L
L
5
L
6
L
L
L
H
7
H
L
0
H
L
1
H
L
2
3
L
C3
C4
L
L
r5
r6
INA
H
H
L
H
L
H
H
L
Rs
Rs
INB
H
L
L
L
H
L
H
L
INB
H
H
L
Active Low
VCC (46V max)
Excitation signal time chart
2-phase excitation
+
r1 : 510Ω
r2 : 100Ω(VR)
r3 : 47kΩ
r4 : 47kΩ
r5 : 2.4kΩ
r6 : 2.4kΩ
C1 : 470pF
C2 : 470pF
C3 : 2200pF
clock
INA
0
L
1
H
L
2
H
L
3
L
0
L
1
H
L
INA
H
L
H
H
L
H
L
INB
L
H
L
L
Vb (5V)
7
12
8
1
18
11
INB
H
H
H
H
VSA VSB OUTA OUTA OUTB OUTB
r1
6
r3
r4
INA
INA
INA
INB
INB
SLA7024M
5
INA
2
Active
Low
C4 : 2200pF
TdA
7026M
7027MU
17
16
Rs : 1Ω typ(7024M)
(1 to 2W) 0.68Ω typ(7026M)
1.8Ω typ(7027MU)
TdB
INB
13
C1
C2
INB
GB
15
1-2 phase excitation
RSA REFA REFB RSB
9
GA
4
r2
3 14
10
clock
0
L
1
L
2
H
H
L
3
H
L
4
H
L
5
H
L
6
H
H
H
L
7
L
0
L
1
L
2
H
H
L
3
H
L
C3
C4
INA
INA
INB
INB
H
H
H
H
L
H
H
L
H
H
H
H
L
r5
r6
Rs
Rs
L
H
H
H
L
L
H
H
H
H
H
H
SLA7027MU/SLA7024M/SLA7026M
21
2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)
SLA7027MU/SLA7024M/SLA7026M
■External Dimensions
(Unit: mm)
31±0.2
24.4±0.2
16.4±0.2
φ3.2±0.15
φ3.2±0.15×3.8 4.8±0.2
1.7±0.1
3.
4.
5.
Part No.
Lot No.
2.45±0.2
R-End
+0.2
–0.1
+0.2
0.65
2.2±0.6
1
–0.1
+0.2
–0.1
+0.2
+0.2
6±0.6
0.65
1
–0.1
0.55
–0.1
7.5±0.6
4±0.7
17×P1.68±0.4=28.56±1
17×P1.68±0.4=28.56±1
31.3±0.2
123 ·
· · · · · · 18
1 2 3 ·
· · · · · · 18
Forming No. No.871
Forming No. No.872
SLA7027MU/SLA7024M/SLA7026M
22
2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)
SLA7027MU/SLA7024M/SLA7026M
Application Notes
■Determining the Output Current
Fig. 1 shows the waveform of the output current (motor coil cur-
rent). The method of determining the peak value of the output
current (IO) based on this waveform is shown below.
(Parameters for determining the output current IO)
Vb: Reference supply voltage
Fig. 1 Waveform of coil current (Phase A excitation ON)
I
O
Phase A
0
r1,r2: Voltage-divider resistors for the reference supply voltage
RS: Current sense resistor
Phase A
(1) Normal rotation mode
IO is determined as follows when current flows at the maximum
level during motor rotation. (See Fig.2.)
Fig. 2 Normal mode
Vb
r2
................................................................
(1)
IO
•
r1+r2
RS
Vb(5V)
r1
(2) Power down mode
r6
r5
The circuit in Fig.3 (rx and Tr) is added in order to decrease the
coil current. IO is then determined as follows.
3,(14)
r2
C3
Vb
1
.........................................................
9,(10)
(2)
IOPD
•
r1(r2+rX)
r2 • rX
RS
1+
RS
Equation (2) can be modified to obtain equation to determine rx.
1
rX=
1
1
Vb
−1
−
Fig. 3 Power down mode
r1
r2
Rs • IOPD
Vb(5V)
Fig. 4 and 5 show the graphs of equations (1) and (2) respec-
tively.
r
6
r
1
2
3,(14)
r5
9,(10)
rX
r
C3
Power down
signal
Tr
Fig. 5 Output current IOPD vs. Variable current sense resistor rx
Fig. 4 Output current I
O
vs. Current sense resistor R
S
4
2.0
RS =0.5Ω
3
2
1
0
1.5
r
2
Vb
I
O
=
·
2
1
Vb
RS
r
1+r
RS
IOPD=
·
r1(r2+rX
)
r
r
r
1
2
x
=510Ω
=100Ω
=∞
1+
r2 · rX
RS =0.8Ω
RS =1Ω
1.0
0.5
0
r1=510Ω
r2=100Ω
Vb=5V
Vb=5V
0
1
2
3
4
0
200 400 600 800 1000 1200
Current sense resistor RS (Ω)
Variable current sense resistor rX (Ω)
(NOTE)
Ringing noise is produced in the current sense resistor RS when
the MOSFET is switched ON and OFF by chopping. This noise
is also generated in feedback signals from RS which may there-
fore cause the comparator to malfunction. To prevent chopping
malfunctions, r5(r6) and C3(C4) are added to act as a noise filter.
However, when the values of these constants are increased,
the response from RS to the comparator becomes slow. Hence
the value of the output current IO is somewhat higher than the
calculated value.
SLA7027MU/SLA7024M/SLA7026M
23
2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)
SLA7027MU/SLA7024M/SLA7026M
Fig. 6 Chopper frequency vs. Motor coil resistance
■Determining the chopper frequency
Determining TOFF
The SLA7000M series are self-excited choppers. The chopping
OFF time TOFF is fixed by r3/C1 and r4/C2 connected to terminal
Td.
60
15
50
TOFF can be calculated using the following formula:
40
µ
47kΩ
=
r
r
3C
OFF =12
=1Ω
1
4C
2
20
=
500pF
2
2
TOFF −r3 • C1 n (1−
=−r4 • C2 n (1−
)
r
r
T
R
L
µ
s
30
20
10
0
25
30
35
40
Vb
Vb
S
m
=1~3ms
m
The circuit constants and the TOFF value shown below are rec-
ommended.
R
TOFF = 12µs at r3=47kΩ, C1=500pF, Vb=5V
0
2
4
6
8
10
12 14
16
Motor coil resistance Rm (Ω)
■Chopper frequency vs. Supply voltage
■Chopper frequency vs. Output current
50
40
50
40
30
30
Motor : 23LM-C202
Motor : 23LM-C202
V
R
CC=24V
=1Ω
I
O
= 0.8A at VCC=24V
S
RS=1Ω
20
10
0
20
10
0
0
10
20
30
CC (V)
40
50
0
0.2
0.4
0.6
0.8
1.0
V
IO (A)
SLA7027MU/SLA7024M/SLA7026M
24
2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)
SLA7027MU/SLA7024M/SLA7026M
■Thermal Design
(2) The power dissipation Pdiss is obtained using the following formula.
An outline of the method for calculating heat dissipation is shown be-
2-phase excitation: Pdiss 2PH+0.015×VS (W)
3
low.
1-2 phase excitation: Pdiss
PH+0.015×VS (W)
2
(1) Obtain the value of PH that corresponds to the motor coil current
IO from Fig. 7 "Heat dissipation per phase PH vs. Output current IO."
(3) Obtain the temperature rise that corresponds to the calcu-
lated value of Pdiss from Fig. 8 "Temperature rise."
Fig. 7 Heat dissipation per phase PH vs. Output current IO
SLA7027MU
SLA7026M
1.2
4.0
1
3.0
0.8
Motor : 23PM-C503
Holding mode
=44V
C
Motor : 23LM-C202
Holding mode
VC
0.6
2.0
1.0
0
0.4
0.2
0
0
0.2
0.4
0.6
0.8
1.0
0
1.0
2.0
3.0
Output current
IO (A)
Output current I
O
(A)
Fig. 8 Temperature rise
SLA7024M
150
1.2
1.0
0.8
0.6
0.4
0.2
0
Tj
∆
100
50
0
TC
36V
∆
Natural cooling
Without heatsink
Motor : 23LM-C004
Holding mode
0
0.2
0.4
0.6
0.8
1.0
0
1
2
3
4
5
Total Power (W)
Output current I
O
(A)
Thermal characteristics
SLA7027MU
SLA7026M
35
50
40
30
20
10
0
Without heatsink
Natural cooling
Without heatsink
Natural cooling
30
25
20
15
10
5
TC( 4 pin)
TC ( 4 pin)
Motor : 23PM-C705
Motor current I =1.5A
=25°C
CC=24V, V
2-phase excitation
Motor : PH265-01B
Motor current I =0.8A
=25°C
CC=24V, V
2-phase excitation
O
O
T
a
T
a
V
S=24V
V
S=24V
0
200
500
Response frequency (pps)
1K
100
500
1K
5K
Response frequency (pps)
SLA7024M
30
25
20
15
10
5
Without heatsink
Natural cooling
TC ( 4 pin)
Motor : PH265-01B
Motor current I =0.8A
=25°C
CC=24V, V
2-phase excitation
O
T
a
V
S=24V
0
200
500
1K
Response frequency (pps)
SLA7027MU/SLA7024M/SLA7026M
25
2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)
SLA7027MU/SLA7024M/SLA7026M
■Supply Voltage VCC vs. Supply Current ICC
SLA7027MU
SLA7026M
500
1.5
1.0
0.5
0
400
Motor : 23LM-C202
Motor : 23PM-C503
1-phase excitation
Holding mode
300
1-phase excitation
Holding mode
IO : Output current
IO : Output current
200
100
0
IO=3A
I
O=1A
I
I
O
=2A
=1A
0.4A
0.2A
O
0
10
20
30
40
50
0
10
20
30
40
50
Supply voltage VCC (V)
Supply voltage VCC (V)
SLA7024M
500
400
300
200
100
0
Motor : 23LM-C004
1-phase excitation
Holding mode
IO : Output current
I
O
=1A
0.5A
0.2A
0
10
20
30
40
50
Supply voltage VCC (V)
■Note
The excitation input signals of the SLA7027MU, SLA7024M and SLA7026M can be used as either Active High or Active Low. Note,
however, that the corresponding output (OUT) changes depending on the input (IN).
Active Low
Active High
Input
Corresponding output
OUTA (pin1)
Input
Corresponding output
OUTA (pin8)
INA (pin6)
INA (pin5)
INB (pin17)
INB (pin16)
INA (pin6)
INA (pin5)
INB (pin17)
INB (pin16)
OUTA (pin8)
OUTA (pin1)
OUTB (pin11)
OUTB (pin18)
OUTB (pin11)
OUTB (pin18)
SLA7027MU/SLA7024M/SLA7026M
26
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