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參數(shù)資料
| 型號： | FAN8727 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | Spindle + 4-CH Motor Drive IC |
| 中文描述： | 4 CHANNEL CD MOTOR DRIVER, PQFP52 |
| 封裝： | 14 X 14 MM, HEAT SINK, QFP-48/52 |
| 文件頁數(shù)： | 17/24頁 |
| 文件大?。?/td> | 480K |
| 代理商： | FAN8727 |
FAN8727
17
In the cases above, the value of H2 at the falling edges of H3 is Low in figure <a>, while High in figure <b>. The rotational
direction detector takes advantage of this phenomenon.
8. Reverse Rotation Preventing Function
- The forward and reverse rotation of the motor are detected, as shown in the table below, by the circuit shown above.
Consequently at reverse rotation, the D-F/F output Q becomes Low and cuts off the output current sense Amp, resulting
in the stoppage of the Gain controller function.
- When the MD is rotating in forward direction, E
C
>E
CR
is sometimes controlled to retard and/or stop the MD. As the
controlling time of E
C
>E
CR
gets longer, MD slows down, stops, and then rotates in the reverse direction. To prevent the
MD from rotating in the reverse direction, a reverse rotation resistant function is required. Its operational principles are
discussed below.
Rotation
H2
H3
D-F/F
Reverse Rotation Preventer
E
C
<E
CR
Forward
-
E
C
>E
CR
Brake and Stop
Stop
Forward
Reverse
H
L
H
→
L
H
→
L
H
L
( b)
H1
H2
H3
+
+
+
Current
Sense
Amp
Gain
Controller
Driver
D-F/F
M
D
Q
CK
H3+
H3
H2+
H2
E
C
E
CR
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| FAN8728 | Spindle + 4-CH Input PWM Motor Drive IC |
| FAN8729 | Spindle+4-CH Motor Drive IC |
| FAN8729_NL | Spindle+4-CH Motor Drive IC |
| FAN8732BG | Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN8727_04 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle + 4-CH Motor Drive IC |
| FAN8727_NL | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle + 4-CH Motor Drive IC |
| FAN8728 | 功能描述:馬達/運動/點火控制器和驅(qū)動器 BLDC+ 4Ch BTL Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| FAN8729 | 功能描述:馬達/運動/點火控制器和驅(qū)動器 BLDC+4CH BTL RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| FAN8729_NL | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle+4-CH Motor Drive IC |
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