參數(shù)資料
型號(hào)： KA3032
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 光電元器件
英文描述： 5-Channel Motor Drive IC
中文描述： CD MOTOR DRIVER, PQFP48
封裝： QFP-48
文件頁(yè)數(shù)： 15/24頁(yè)
文件大?。?/td> 353K
代理商： KA3032
KA3032
15
5. FOCUS, TRACKING ACTUATOR, APINDLE, SLED MOTOR DRIVE PART
The voltage, Vref is the reference voltage given by the external bias voltage of pin 46.
The input signal (Vin) through pin 2, 5, 10 and 47 are by the AP1 amplified one times (Rref1=Rfeed1) 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
46
1
4
9 12
48 3
8 11
2
5 10 47
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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