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參數(shù)資料
| 型號(hào)： | 5962-9474601M2A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1 A, CQCC20 |
| 封裝： | CERAMIC, LCC-20 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 536K |
| 代理商： | 5962-9474601M2A |
I0
I1
CURRENT LEVEL
0
100%
1
0
60%
0
1
19%
1
Current Inhibit
Current Control: The voltage divider, comparators and
monostable provide a means for current sensing and
control. The two bit input (I0, I1) logic selects the desired
comparator. The monostable controls the off time and
therefore the magnitude of the current decrease. The
time duration is determined by RT and CT connected to
the timing terminal (pin 2). The reference terminal (pin
11) provides a means of continuously varying the cur-
rent for situations requiring half-stepping and micro-
stepping. The relationship between the logic input
signals at pin 7 and 9 in reference to the current level is
shown in Table 1. The values of the different current lev-
els are determined by the reference voltage together
with the value of the external sense resistor RS (pin 16).
Single-Pulse Generator: The pulse generator is a
monostable triggered on the positive going edge of the
comparator. Its output is high during the pulse time and
this pulse switches off the power feed to the motor wind-
ing causing the current to decay. The time is determined
by the external timing components RT and CT as:
TOFF = 0.69 RTCT
If a new trigger signal should occur during TOFF, it is ig-
nored.
Figure 6
Figure 7: Simplified Schematic of Output Stage
UC1717
UC2717
UC3717
Note: Dashed lines indicate current decay paths.
4
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