参数资料
型号: LB8120V
元件分类: 运动控制电子
英文描述: DISK DRIVE MOTOR CONTROLLER, 0.8 A, PDSO44
封装: 0.275 INCH, SSOP-44
文件页数: 5/9页
文件大小: 114K
代理商: LB8120V
LB8120V
No.8079-5/9
Pin Description
Pin No.
Pin Name
Equivalent Circuit Diagram
Functions
4
5
17
18
19
IN1, IN2
IN3, IN4
ASPREF
Actuator control signal corresponding to each
of IN1 : Focus, IN2 : Tracking, IN3 : Spindle,
and IN4 : Sled and entered by ASP (DSP).
Gain adjustment possible with input resistance.
15, 14
13, 12
10, 9
8, 7
OUT1+, 1-
OUT2+, 2-
OUT3+, 3-
OUT4+, 4-
Actuator drive output pin for focus.
Actuator drive output pin for tracking coil
Spindle motor drive output pin
Sled motor drive output pin (Spark killer Di
incorporated in each channel)
2, 20
VOUT
4ch H-bridge driver power supply pin that can
generate the voltage equivalent to the
maximum value of 4ch control output +
α by
means of the external PWM step-down circuit.
21
VCD
Input pin of the 3.9V step-up circuit.
The control system operates on this voltage.
This voltage is also supplied to DSP and
microcomputer.
22
MUTE
Input pin to mute 4ch actuator simultaneously
“H” : Mute
26
OSCPWR
CR power supply pin to prevent reactive
current in the OSC oscillation circuit
44
OSC
Input pin for the self-oscillation circuit to
operate PWM step-down and step-up circuits.
The oscillation frequency is determined with
external CR.
34
GND
Small signal system GND pin of LB8120.
(GND other than output Tr)
Continued on next page.
VCD
ASPREF
200
IN1 to 4
7.7k
VCD
VOUT
OUT-
OUT+
PGND
60k
MUTE
20
A
80k
VCD
100k
100
A
OSC
4k
20
A
VCC
OSCPWR
200
A
20
A
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