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參數(shù)資料
| 型號： | L6238 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Sensorless Spindle Motor Driver(無傳感器主軸電機(jī)驅(qū)動器) |
| 中文描述： | 傳感器主軸電機(jī)驅(qū)動器（無傳感器主軸電機(jī)驅(qū)動器） |
| 文件頁數(shù)： | 17/35頁 |
| 文件大小： | 383K |
| 代理商： | L6238 |
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DACs as a function of the system clock repetition
rate. Fcoarse is the system clock divided by 512,
while Ffine divides the clock by 8. This gives for
example, Coarse and Fine LSB’s of 51.3us and
800ns respectively for a system clock repetition
rate of 10MHz. Thereforethe best phase jitter that
could be achieved as a function of the counter
resolution is 800ns. The dynamic range of each
counteris also shown in the table.
It can be seen that the ratio of Fine to Coarse
counts is 64. The summing amplifler divides the
Fine DAC buffer output voltage by a factor of 16.
Therefore there is a 4:1 ratio of Fine to Coarse
gain.
This results in a Speed Control Loop that is fairly
easy to compensate with excellent transient re-
sponse.
The output of the PLL Detector is fed to a gener-
al purpose. filter amplifier that is used to compen-
sate the Speed Control Loop. The filter amplifier
output stage has been carefully designed to limit
the compliance voltage to a value that tracks the
Ilim Set
voltage, thus limiting the amount of over-
shoot and enhancing the transient response of
the loop.
4.5 PLL Detector Output
Figure 14 is a graph of the typical
DETECTOR
OUTPUT
voltage as a function of the detected
phase difference as measured on production ma-
terial. The change of the gain slope is apparent
around the zero phase difference point. With the
spindle motor at phase lock, the
DETECTOR
OUTPUT
voltageis typically 2.0, equivalent to the
internalVirtual Groundlevel.
Figure13:
Coarse/FineDAC’sOutput Graphs.
Figure 14:
V
detector
Output vs PhaseError.
L6238
17/35
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| L6243 | VOICE COIL MOTOR DRIVER |
| L6243D | VOICE COIL MOTOR DRIVER |
| L6243DS | VOICE COIL MOTOR DRIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6238S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:12V SENSORLESS SPINDLE MOTOR CONTROLLER |
| L6238SQA | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:12V SENSORLESS SPINDLE MOTOR CONTROLLER |
| L6238SQT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:12V SENSORLESS SPINDLE MOTOR CONTROLLER |
| L6239 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| L623C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:THYRISTOR MODULE|BRIDGE|HALF-CNTLD|CA|280V V(RRM)|46A I(T) |
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