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參數(shù)資料
| 型號： | KA3019D2 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | 4-CH Motor Driver For CD System(用于CD系統(tǒng)的四通道馬達(dá)驅(qū)動(dòng)器) |
| 中文描述： | 4 CHANNEL CD MOTOR DRIVER, PDSO28 |
| 封裝： | 0.300 INCH, HSSOP-28 |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 298K |
| 代理商： | KA3019D2 |
CD-ROM PRODUCTS
KA3019D2
7
MIC-99D001
January 1999
4. FOCUS, TRACKING ACTUATOR, SLED MOTOR DRIVE PART
The reference voltage REF is given externally through pin 12.
The error amp output signal is amplified by R2 / R1 times and then fed to the level shift circuit.
The level shift circuit produces the differential output voltages and drives the two output power amplifiers.
Since the differential gain of the output amplifiers is equal to 2
×
(1+ R4 / R3), the output signal of the error amp
is amplified by (R2 / R1)
×
2
×
(1 + R4 / R3).
If the total gain is insufficient, the input error amp can be used to increase the gain.
The bias voltage (Vrr) is about a half of the supply voltage(VM).
+
+
+
+
+
M
12
3
6
7
2
5
1
4
Vin
EA
Vref
R1
AP1
R2
+
LEVEL
SHIFT
R3
Vrr
R3
AP2
AP3
R4
R4
Power amp
Error amp
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