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參數(shù)資料
| 型號(hào)： | KA9260D |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | 5-CHANNEL MOTOR DRIVER |
| 中文描述： | CD MOTOR DRIVER, PDSO28 |
| 封裝： | 0.375 INCH, SSOPH-28 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 295K |
| 代理商： | KA9260D |
KA9260D
9
The V
REF BG
is the output voltage of the band-gap-referenced biasing circuit and is the reference voltage of the regulator.
The external circuit is composed of the transistor, KSB772 and a capacitor, 100
μ
F, and the capacitor is used as a ripple
eliminator and should have a good temperature characteristics.
The output voltage, V
OUT
is decided as follows.
V
OUT
= V
REF BG
×
2 = 2.5
×
2 = 5V (R2 = R3)
where, the V
REF BG
= V
D1
+ V
D2
+ (I
×
R1)
R2=R3
4. LOADING MOTOR DRIVER
The input voltages of (5V and 0V) or (0V and 5V) pairs are applied to the input pin #9 and #14 respectively.
When the input voltages are applied to the input pin #9 and #14, then the output of the comparator depends on the input
voltage status.
As shown in the above diagram, the difference
V, [V
REF1
+ (I
×
R)] - [V
REF1
-(I
×
R)], is applied to the both terminals
of the motor. The direction of the motor is decided by the voltage difference, +
V and
V.
The output characteristics is as follows,
- If pin # 9=5V and #14=0V, then pin # 15=+
V and #16=
V, hence the motor turn in forward direction.
- If pin # 9=0V and #14=5V, then pin # 15=
V and #16=+
V, hence the motor turn in reverse direction.
- If pin # 9=5V and #14=5V, then
V=0V, hence the motor stop.
- If pin # 9=0V and #14=0V, then
V=0V, hence the motor stop.
When the rotation speed control of the loading motor is desired, refer to the circuit below.
5. LOADING MOTOR SPEED CONTROL
If the torque of the loading motor is too low when it is used with the pin #20 OPEN, then it should be used as in the above
diagram.
The desired torque could be obtained by selecting the appropriate resistor R as shown in the left diagram.
If it is necessary, the zener diode can be used as in the right diagram.
The maximum torque is obtained when the applied voltage at pin #20 is about 6.8V (at V
CC
=8V).
+
+
Buffer
Buffer
Q1
Q3
M
Q2
Q4
+
V
V
9
15
+
14
20
16
+
V
V
V
REF1
COMP
R
I
I
R
V
REF1
20
20
V
CC
(8V)
4V
50k
R
V
CC
D
V
CC
R
50k
50k
50k
4V
V
CC
(8V)
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