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參數(shù)資料
| 型號： | KA3903 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Power Window Motor Control IC |
| 中文描述： | BRUSH DC MOTOR CONTROLLER, 0.4 A, PDIP16 |
| 封裝： | 0.300 INCH, DIP-16 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大小： | 286K |
| 代理商： | KA3903 |
FAN8903(KA3903)
10
The position of the sensor must be set adequately upper part of the window. When the obstacle between the window glass and
the upper limit are inserted, the light sensor TR is turned off. The sensor have a two function;
- End position switch,
- Issuing the OCP signal.
Q2 is used to make the F/C pin low, and Q4 enables to turn-on Q6 to issue the OCP signal.
As soon as Q2 is turned on, V2 changes from the equation mentioned in 6.2 paragraph to the below equation.
and OP-amp output become low level. Therefore the HBP logic stops the motor and reverses the direction of the motor.
You can adjust the delay time by changing the value of the resistor, R10. The added part works only when Q5 is on-state. In
other words, when the window glass is moving upward, the added part operates. Q3 is also turned on and holds the F/C pin low
level.
Output Stage
The output stage is a darlington TR with an integrated zener diode, and designed at a pulse current of a approx. 0.4A. The
zener diode limits the inductive switch-off voltage. The relay coil has a typical resistances of 200
, and the zener diode volt-
age is 18.6V.
With the circuitry of this type, the FAN8903 can sustain 24V for one minute (or continuously) and load dump
(70V, 0.2sec) condition without a damage.
V2
Vcom
R10 // Rntc
Rt
+
)
[
]
R10 // Rntc
Rt
+
)
R5
+
[
]
×
=
+
+
+
Start key
Light
sense
Added part
KSR1012
R4
V1
Q2
Q3
Motor
(+)
KSR2007
Q4
KSC945
Pin #8
NTC
Rt
C3
COMP
V
CC
OP-amp
Vro
0.8V
OCP
Vref
Q6
R10
R3
R
S
Q5
FAN8903
5
2
6
7
C2
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