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參數資料
| 型號： | FAN8741 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Spindle Motor and 6-CH Driver |
| 中文描述： | 主軸電機和6通道驅動器 |
| 文件頁數： | 16/23頁 |
| 文件大小： | 541K |
| 代理商： | FAN8741 |
16
www.fairchildsemi.com
FAN8741/FAN8742 Rev. 1.0.1
F
5. Reverse Rotation Prevention(Spindle)
1) 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 VREF>SPIN, then the motor rotates slowly by the reverse commutation in the driver. When the
motor begins to rotate in the reverse direction, the D-F/F output becomes Low and the OR Gate output becomes Low. This
prevents the motor from continuing to rotate in the reverse direction. This operation principle is shown in the following table
and flow chart.
Rotation
HV
HW
D-F/F
(Q)
Reverse Rotation Preventer
V
REF
<SPIN
Forward
V
REF
>SPIN
-
Forward
H
H
→
L
H
→
L
H
Reverse
L
L
-
Brake and Stop
+
-
+
-
+
-
Current
Sense
Amp
Gain
Controller
Driver
D-F/F
M
D
Q
CK
HW+
HW-
HV+
HV-
SPIN
VREF
A
Low Active
Forward rotation at VREF< SPIN
Rotating speed is decreased due to reverse torque at VREF>SPIN
and appropriate mute combination. (Motor still rotates forward)
At the moment that the motor rotates in reverse, the reverse rotation preventer makes
the output power stage equal to the short brake which is lower ,and three power transistors are fully turned on.
Motor rotates in reverse for short time due to motor inertia
Power stage remains in short brake scheme until forward rotation command is received.
相關PDF資料 |
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|---|---|
| FAN8741G | Spindle Motor and 6-CH Driver |
| FAN8741GX | Spindle Motor and 6-CH Driver |
| FAN8741MTF | Spindle Motor and 6-CH Driver |
| FAN8741MTFX | Spindle Motor and 6-CH Driver |
| FAN8742G | Spindle Motor and 6-CH Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN8741G | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle Motor and 6-CH Driver |
| FAN8741GX | 功能描述:馬達/運動/點火控制器和驅動器 POWER_CONVERSION RoHS:否 制造商:STMicroelectronics 產品: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 |
| FAN8741MTF | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle Motor and 6-CH Driver |
| FAN8741MTFX | 功能描述:IC PWM SPINDLE 6CH DRIVE 56TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電機和風扇控制器，驅動器 系列:- 產品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標準包裝:1 系列:- 應用:DC 電機控制器，無刷（BLDC），3 相 評估套件:可供 輸出數:1 電流 - 輸出:100mA 電壓 - 負載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT |
| FAN8742G | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle Motor and 6-CH Driver |
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