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参数资料
| 型号： | LB8109M |
| 元件分类： | 运动控制电子 |
| 英文描述： | DISK DRIVE MOTOR CONTROLLER, 0.8 A, PQFP44 |
| 封装： | QFP-44 |
| 文件页数： | 5/9页 |
| 文件大小： | 640K |
| 代理商： | LB8109M |
LB8109M
No. 5233-5/9
Pin Functions
Pin No.
Symbol
Equivalent circuit
Function
Continued on next page.
Actuator control signals for each driver:
IN1: Focus, IN2: Tracking,
IN3: Spindle, IN4: Sled.
These signals are input from the ASP
(DSP).
Control reference signal input pin for
each driver. This signal is input from
the ASP (DSP).
Focus coil actuator drive output pins.
Tracking coil actuator drive output pins.
Spindle motor drive output pins. Sled
motor drive output pins. (Each channel
includes built-in spark killer diodes.)
Power supply pins for the H bridge
driver. VOUT1 is for the focus/tracking
group and VOUT2 is for the spindle/sled
group. Maximum value + α
(α : saturation voltage of upper/lower
output Tr) of control output for each
2CH is set by external PWM step-
down circuit.
Power supply for the actuator driver
controller, maximum value circuit for
PWM, sled controller, and MUTE
block.
Base drive output pin for the external
NPN-Tr for the battery pulse charging
circuit.
Base drive output pin for the external
step-down NPN-Tr used when external
voltage input is applied.
Base drive output pin for the PNP-Tr
for the step-down PWM that generates
the power supply for the H bridge
driver that drives the focus/tracking
group actuators.
Base drive output pin for the PNP-Tr
for the step-down PWM that generates
the power supply for the H bridge
driver that drives the spindle/sled
group actuators.
Base drive output pin for the external
NPN-Tr for the step-up circuit that sets
the external voltage for the DSP.
1, 2
32, 33
30
43, 42
41, 40
38, 37
36, 35
3
31
4
5
10
15
16
17
IN1, IN2
IN3, IN4
ASPREF
OUT1
+, 1–
OUT2
+, 2–
OUT3
+, 3–
OUT4
+, 4–
VOUT 1
VOUT 2
VCD
CHGDRV
EXTDRV
DNB-1
DNB-2
ASPDRV
Constant-current circuit which
changes with the input of CH1
through 4. (3 mA max)
Constant current
value of each
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