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參數(shù)資料
| 型號： | KA3023D |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | 3-Phase BLDC Motor Driver(三相無刷直流電機(jī)驅(qū)動器) |
| 中文描述： | CD MOTOR DRIVER, PDSO28 |
| 封裝： | 0.375 INCH, HSSOP-28 |
| 文件頁數(shù)： | 11/18頁 |
| 文件大?。?/td> | 283K |
| 代理商： | KA3023D |
FAN8423D (KA3023D); PRELIMINARY
11
Therefore, the output of the rotational direction detector is Low, when the spindle rotates forward, while HIGH as in the case
of the reverse rotation.
6. REVERSE ROTATION PREVENTION
1) When the output of the OR Gate, A is LOW, it steers all the output current of the current sense Amp to the Gain Controller
zero. The output current of the Driver becomes zero and the motor stops.
2) As in the state of the forward rotation, the D-F/F output, Q is HIGH and the motor rotates normally. At this state, if the
control input is changed such that EC>ECR, then the motor rotates slowly by the reverse commutation in the Driver. When
the motor rotates in reverse direction, the D-F/F output becomes Low and the OR Gate output, becomes LOW. This pre-
vents the motor from rotating in reverse direction. The operation principle is shown in the table and the flow chart.
Rotation
H2
H3
D-F/F
(Q)
Reverse Rotation Preventer
E
C
<E
CR
Forward
-
E
C
>E
CR
-
Brake and Stop
Forward
Reverse
H
L
H
→
L
H
→
L
H
L
(b) Forward rotation
H1
H2
H3
+
-
+
-
+
-
Current
Sense
Amp
Gain
Controller
Driver
D-F/F
M
D
Q
CK
H3+
H3-
H2+
H2-
EC
ECR
A
Low Active
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