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參數(shù)資料
| 型號： | SLA6503 |
| 廠商： | SANKEN ELECTRIC CO LTD |
| 元件分類： | 運動控制電子 |
| 英文描述： | 5-Phase Stepper Motor Driver ICs |
| 中文描述： | STEPPER MOTOR CONTROLLER, 6 A, PSFM12 |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 57K |
| 代理商： | SLA6503 |
107
SI-7502
(SLA5011/SLA6503)
SI-7502
(SLA5011/SLA6503)
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
Fig. A
Waveform of output current
I
OH
O
I
OH(max)
=0.212
×
V
b
0.01
Rs
I
OH(min)
=0.169
×
V
b
0.03
Rs
I
OH(max)
(V
b
=5V)
I
OH(min)
(V
b
=5V)
1
2
3
4
5
(
)
(A)
3
2
1
0.5
0.2
Sense resistor Rs
O
O
V
RSH (max)
=
7.2
×
R
X
152.6+33.8
×
R
X
×
V
b
0.01
V
RSH (min)
=
6.1
×
R
X
152.6+33.8
×
R
X
×
V
b
0.03
V
RSH(ma)
(V
b
=5V
V
RSH(mn
(V
b
=5V
0.5
1
2
5
10
(K
)
Variable current resistor Rx
20
0.2
1.0
0.8
0.6
0.4
(V)
S
R
I
OM
I
OM
I
OM
I
OM
2
×
I
OM
2
×
I
OM
V
CC
4
×
I
OM
to SI-7502
Sense resistor Rs
Fig. B Output current vs. Current sense resistor
Fig. C Sense voltage vs. Variable current resistor
Fig. D Coil current flow at pentagonal driving
I
Determining 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,
V
RSH
R
S
V
RSH
can be calculated as follows:
V
RSH
=0.19
×
V
b
0.03 (center value)
From equations (1) and (2), the output current I
OH
can be
calculated as follows:
1
R
S
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).
I
Relation 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
Application Notes
...............................(2)
I
OH
=
......................................................................(1)
I
OH
= (0.19
×
V
b
×
-0.03)
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