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參數(shù)資料
| 型號(hào)： | FAN8902 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | DC FAN Motor Controller(風(fēng)扇直流電機(jī)控制器) |
| 中文描述： | BRUSH DC MOTOR CONTROLLER, 0.8 A, PDIP14 |
| 封裝： | 0.300 INCH, DIP-14 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 140K |
| 代理商： | FAN8902 |
FAN8902(KA3902)
7
4. OSCILLATOR COMPONENT SELECTION
The oscillator timing components can be calculated as follows:
For example, if fosc = 25kHz and duty = 95%
5. CURRENT COMMAND INPUT SECTION
The current command I* selects the lower value between V
CMD
and V
La
.
V
H
V
L
I
D
C
T
R
T
V/C
T
Vref
Logic
+
V
CT
[V]
V
H
=3.0
V
L
=1.75
T=40.0
T
C
=39.0
Td=1.0
t [
μ
s]
T
C
T
D
R
T
C
T
1
C
T
(
[
×
×
(
In Vref
V
L
–
)
Vref
V
H
–
(
)
]
×
=
V
H
+
V
L
)
×
×
–
)
I
D
]
=
fosc
T
C
T
D
R
T
=
1.875
C
T
100
(
)
=
Duty
T
C
fosc
×
=
C
T
T
D
1000 pF
1.875
I
D
×
(
)
V
H
V
L
–
(
)
=
]
=
=
R
T
fosc
C
T
×
×
(
(
)
1.875
75 k
25kHz
1000pF
)
=
=
]
+
+
+
14
1
CMD
V
CMD
La
V
La
4R
R
Logic
I*
FAN8902
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