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參數(shù)資料
| 型號(hào)： | FAN8008 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 光電元器件 |
| 英文描述： | 6-Channel Motor Drive IC |
| 中文描述： | CD MOTOR DRIVER, PQFP52 |
| 封裝： | 14 X 14 MM, HEAT SINK, QFP-48 |
| 文件頁(yè)數(shù)： | 15/24頁(yè) |
| 文件大小： | 360K |
| 代理商： | FAN8008 |
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FAN8008
15
Rev. 1.0.1
February. 2000.
5. Focus, Tracking Actuator, Spindle, Sled Motor Drive Part
The voltage, Vref is the reference voltage given by the external bias voltage of the pin 45.
The input signal (Vin) through pins 3, 6, 9 and 48 is amplified one times (Rref1 = Rfeed1) by the AP1 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 are fed into the output amplifier, where output amplifier (AP2, 3) gain is two times (all
Rref2 = Rfeed2).
If you desire to change the gain, the input buffer amplifier (BF) can be used.
The output stage is the balanced transformerless (BTL) driver.
The bias voltage Vr is expressed as below;
+
+
+
+
+
M
45
2
5
8 11
1
4
7 10
3
6
9 48
Vin
BF
Vref
Rref1
AP1
Rfeed1
+
LEVEL
SHIFT
Rref2
IC
Vr
Rref2
AP2
-
AP3
Rfeed2
Rfeed2
Vr
V
---------------------------
V
V
–
2
[ ]
=
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