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參數(shù)資料
| 型號(hào)： | SLA7026M |
| 廠商： | SANKEN ELECTRIC CO LTD |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 2-Phase Stepper Motor Unipolar Driver Ics(2相步進(jìn)電機(jī)單極驅(qū)動(dòng)器芯片) |
| 中文描述： | STEPPER MOTOR CONTROLLER, 3 A, PZFM18 |
| 封裝： | PLASTIC, ZIP-18 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大小： | 74K |
| 代理商： | SLA7026M |
23
SLA7027MU/SLA7024M/SLA7026M
SLA7027MU/SLA7024M/SLA7026M
2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)
R
S
C
3
r
2
r
1
r
6
r
5
V
b
(5
V
)
9,(10)
3,(14)
C
3
r
2
r
1
r
6
r
5
V
b
(5
V
)
9,(10)
3,(14)
r
X
T
r
Power down
signal
I
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 (I
O
) based on this waveform is shown below.
(Parameters for determining the output current I
O
)
V
b
: Reference supply voltage
r
1
,r
2
: Voltage-divider resistors for the reference supply voltage
R
S
: Current sense resistor
(1) Normal rotation mode
I
O
is determined as follows when current flows at the maximum
level during motor rotation. (See Fig.2.)
r
r
1
+r
2
R
S
(2) Power down mode
The circuit in Fig.3 (rx and Tr) is added in order to decrease the
coil current. I
O
is then determined as follows.
1
r
1
(r
2
+r
X
)
r
2
r
X
Equation (2) can be modified to obtain equation to determine rx.
Fig. 4 and 5 show the graphs of equations (1) and (2) respec-
tively.
(NOTE)
Ringing noise is produced in the current sense resistor R
S
when
the MOSFET is switched ON and OFF by chopping. This noise
is also generated in feedback signals from R
S
which may there-
fore cause the comparator to malfunction. To prevent chopping
malfunctions, r
5
(r
6
) and C
3
(C
4
) are added to act as a noise filter.
Fig. 2 Normal mode
0
Phase A
Phase A
I
O
Fig. 1 Waveform of coil current (Phase A excitation ON)
Fig. 3
Power down mode
4
3
2
1
00
1
2
3
4
Current sense resistor R
S
(
)
O
O
I
O
= r
1
+r
2
R
S
r
1
=510
r
2
=100
r
x
=
∞
V
b
=5V
r
2
·
V
b
Fig. 4
Output current I
O
vs. Current sense resistor R
S
Fig. 5 Output current I
OPD
vs. Variable current sense resistor rx
2.0
1.5
1.0
0.5
00
200
400
600
800
Variable current sense resistor r
X
(
)
O
O
1000
1200
R
S
=0.5
R
S
=0.8
R
S
=1
I
OPD
= 1+ 1
S
r
1
=510
r
2
=100
V
b
=5V
·
V
b
r
(r
2+
r
X
)
r
2
·
r
X
Application Notes
r
X
=
1
V
b
R
s
I
OPD
1
r
1
1
1
r
2
However, when the values of these constants are increased,
the response from R
S
to the comparator becomes slow. Hence
the value of the output current I
O
is somewhat higher than the
calculated value.
................................................................(1)
I
O
V
b
.........................................................(2)
R
S
I
OPD
V
1+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SLA7026 | 2-Phase Stepper Motor Unipolar Driver ICs |
| SLA7027 | 2-Phase Stepper Motor Unipolar Driver ICs |
| SLA7027MU | 2-Phase Stepper Motor Unipolar Driver ICs |
| SLA7026 | HIGH-CURRENT PWM, UNIPOLAR STEPPER MOTOR CONTROLLER/DRIVERS |
| SLA7029 | 2-Phase Stepper Motor Unipolar Driver ICs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SLA7026M LF871 | 制造商:Sanken Electric Co Ltd 功能描述:Tube |
| SLA7026M-LF871 | 制造商:Sanken Electric Co Ltd 功能描述:2-Phase Unipolar Stepper Motor Driver 24V 18-Pin ZIP |
| SLA7027 | 制造商:SANKEN 制造商全稱:Sanken electric 功能描述:2-Phase Stepper Motor Unipolar Driver ICs |
| SLA7027MU | 制造商:Sanken Electric Co Ltd 功能描述:IC DVR 2PH STEPPER MOTOR 18SIP |
| SLA7027MU_10 | 制造商:SANKEN 制造商全稱:Sanken electric 功能描述:2-Phase/1-2 Phase Excitation |
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