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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)： | 10/12頁 |
| 文件大小： | 199K |
| 代理商： | LB8108M |
Continued from preceding page.
No. 4946-7/12
LB8108M
Pin No.
Symbol
Equivalent circuit
Function
15
16
17
18
25
27
29
19
20
21, 22
24, 23
VLDO
VLD
GND
LDUPB
DNB
UPBASP
UPBCD
CT
RST
BO1, BO2
BI1, BI2
Output that directly drives the laser diode.
IO max is about 100 mA.
Input in the laser APC circuit for the external
step-up circuit used to assure VLDO (i.e., to
assure VCE for the internal output transistor)
when VCC falls. VLD is controlled to 0.3 V
(typical) more than VLDO.
LB8108M small signal system ground (ground
for circuits without the output transistor)
Base drive circuit for external step-up npn
transistor in the laser APC circuit for the
external step-up circuit used to assure VLDO
when VCC falls.
Base drive output for the step-down PWM
pnp transistor that generates the power
supplied to the actuator H bridge drivers.
Base drive output for the external npn
transistor for the step-up circuit whose step-
up voltage is set externally.
Base drive output for the 3.9 V step-up
external npn transistor.
Terminal for the reset circuit capacitor
(The reset time will be about 50 ms for a
0.1 F capacitor.)
Reset circuit open collector output
Battery check comparator open collector
output
Battery check comparator input. This voltage
is compared to 1.2 V internally.
Continued on next page.
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