參數(shù)資料
型號: KA9268
廠商: Fairchild Semiconductor Corporation
元件分類: 基準電壓源/電流源
英文描述: 4-CH Motor Driver
中文描述: 4通道馬達驅動器
文件頁數(shù): 8/13頁
文件大小: 270K
代理商: KA9268
FAN8000D (KA9268D)
8
3. OP-AMP
OP-amp is integrated in the IC for user’s convenience.
4. DRIVER
The voltage, V
REF
, is the reference voltage given by the bias voltage of the pin23.
The input signal through the pin3 is amplified by 10k/10k times and then fed to the level shift.
The level shift produces the current due to the difference between the input signal and the arbitrary reference signal. The
current produced as +
I and
I is fed into the driver buffer.
Driver Buffer drives the power TR of the output stage according to the input signal.
The output stage is the BTL driver and the motor is rotating in forward direction by operating TR Q1 and TR Q4. On the
other hand, if TR Q2 and TR Q3 is operating, the motor is rotating in reverse direction
When the input voltage through the pin3 is below the V
REF
, the motor rotates in forward direction.
When the input voltage through the pin3 is above the V
REF
, the motor rotates in reverse direction.
To change the gain, pin4 or 24 can be used.
5. Connect a by-pass capacitor, 0.1
μ
F between the supply voltage source.
6. Radiation fin is connecting to the internal GND of the package.
Connect the fin to the external GND.
+
AMP-I(+)
16 pin
AMP -I(
)
15 pin
14 pin
AMP-O
+
+
+
10k
100
VREF
(2.5V)
10k
AMP
Level
shift
I
+
I
Buffer
Buffer
Q1
Q3
M
Q2
Q4
V
+
V
25
19
10
3
20
9
24
4
1
11
17
27
2
12
18
26
22
21
104
V
CC1
V
CC2
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