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參數資料
| 型號： | FAN8729_NL |
| 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, LEAD FREE, QFP-52/48 |
| 文件頁數： | 15/24頁 |
| 文件大小： | 487K |
| 代理商： | FAN8729_NL |
FAN8729
15
7. Rotational Direction Detecting Function
Rotation detection circuit gives the result to DIR pin by
detecting the MD’s rotational direction.
Detects the MD’s rotational direction using hall signals H2 and
H3.
Feature Table.
Rotation
EC < ECR
Forward
EC > ECR
Reverse
In case of forward rotational detection, the phase of hall signal shows as H3
→
H2
→
H1 as follows;
In case of reverse rotational detection, the phase of hall signal shows as H1
→
H2
→
H3 as follows;
Forward/Reverse rotational direction is decided as follows. When hall signal H3 is falling edge, if H2 shows "High", the
rotational direction is "Forward", and if H2 shows "Low", rotational direction is "Reverse".
DIR
Low
High
D
CK
Q
+
-
+
-
R
D-F/F
8
DIR
H2+
H2-
H3+
H3-
H1
H2
H3
(b)
H1
H2
H3
(a)
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| FAN8732BGX | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
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| FAN8732CGX | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
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