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參數資料
| 型號： | FAN8423DTF |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.3 A, PDSO28 |
| 封裝： | 0.375 INCH, HEAT SINK, SSOP-28 |
| 文件頁數： | 17/18頁 |
| 文件大?。?/td> | 283K |
| 代理商： | FAN8423DTF |
FAN8423D (KA3023D); PRELIMINARY
8
Application Information
1. TORQUE CONTROL & OUTPUT CURRENT CONTROL
1) By amplifying the voltage difference between Ec and Ecr from Servo IC, the Torque Sense AMP produces the input
(VAMP) for the Current Sense AMP.
2) The output current (IO) is converted into the voltage (VCS) through the sense resistor (RCS) and compared with the VAMP.
By the negative feedback loop, the sensed output voltage, VCS is equal to the input VAMP. Therefore, the output current
(IO) is linearly controlled by the input VAMP.
3) As a result, the signals, EC and ECR can control the velocity of the Motor by controlling the output current (IO) of the
Driver.
4) The range of the torque voltage is as shown below.
+
-
+
-
Torque AMP
Ec
Ecr
VM
ECR-EC
Current Sense AMP
TSD
Gain
Controller
Driver
M
Rcs
Vcs
+
-
Io
VM
Rotation
ECR > Ec
Forward rotation
ECR < Ec
Stop after detecting re-
verse rotation
The input range of ECR and EC is 1.0 V ~ 4 V ( RNF = 0.5[] )
Forward
Ecoff+
Ecoff-
Reverse
Current
[mA]
6
0
500
700
0.51[A /V ]
50m V
-50m V
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