參數(shù)資料
型號(hào)： FAN8742GX
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 光電元器件
英文描述： Spindle Motor and 6-CH Driver
中文描述： CD MOTOR DRIVER, PDSO56
封裝： SSOP-56
文件頁(yè)數(shù)： 16/23頁(yè)
文件大?。?/td> 541K
代理商： FAN8742GX
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.
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FAN8742MTF 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle Motor and 6-CH Driver
FAN8742MTFX 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle Motor and 6-CH Driver
FAN8800 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IGBT 單管柵極驅(qū)動(dòng)器
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FAN8903 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Power Window Motor Control IC
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