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參數(shù)資料
| 型號： | LB8108M |
| 元件分類： | 運動控制電子 |
| 英文描述： | DISK DRIVE MOTOR CONTROLLER, 0.8 A, PQFP44 |
| 封裝： | QFP-44 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 199K |
| 代理商： | LB8108M |
Continued from preceding page.
No. 4946-6/12
LB8108M
Pin No.
Symbol
Equivalent circuit
Function
9
10
28
11
12
13
14
LDCTL
OSCPWR
OSC
EXTDRV
EXTVCC
MD in
CLD
Laser diode APC (auto power control) control
signal input. When this voltage falls under
about 0.4 V the APC output is turned off.
RC power supply for invalid current
prevention for the OSC oscillator circuit.
Input for the free-running oscillator circuit
used for PWM step-down and step-up
circuits. The oscillator frequency is
determined by an external RC circuit.
Base drive output for external step-down pnp
transistor used when external power is
applied.
External power supply input. This voltage is
converted into 3.5 V with a PWM step-down
circuit and supplied to VCC.
Input for the output from the laser diode APC
monitor diode.
Terminal for the capacitor that eliminates
high frequency from laser drive signal. This
capacitor is also useful for soft starting in the
LD output.
Continued on next page.
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