LB8109M datasheet(7/9 Pages) SANYO

Part #	LB8109M

Description	Actuator Driver for Portable CD Players

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Manufacturer	SANYO [Sanyo Semicon Device]

Direct Link	https://www.sanyo-av.com/us/

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Continued from preceding page.

Pin No.

Symbol

Equivalent circuit

Function

20

VZ

Zener diode

Reference voltage

startup circuit

S/S function

shant

External

power

input

Forced

startup

Input pin for start-up circuit when

an external voltage input is

applied. The external voltage

input is applied through a

resistor inserted in series. The

voltage is basically determined

by the Zener diode + 2VBE; this

pin has a current draining

capacity up to 20 mA.

24

S/S

LB8109M start-up input. (Start

on a low-level input.)

21

OPIN

−

Inverting input pin for internal OP

amplifier.

22

OPIN

+

Noninverting input pin for internal

OP amplifier.

23

OPOUT

Output pin for internal OP

amplifier. The output circuit type

is ‘‘push-pull.’’

14

CHG-ON

Pin for selecting battery charging

when external voltage input is

applied. This pin determines the

drop voltage for the external

voltage input. When low, the

drop voltage set by VEXT is

selected; when high, the drop

voltage set by VEXT-CHG is

selected.

25

MUTE

Input pin for simultaneously

muting the drivers for the four

channels. (High: mute)

26

G-SELECT

Pin for switching the spindle

driver transfer gain between 8.3

dB and 14.8 dB (typ. value

each). (Low: high gain)

27

SLMODE

Pin for switching the sled driver

between V-type control and step

control. (High: V-type control;

low: step control)

28

VCC

Power supply voltage pin.

29

33

SLREF

IN4

Threshold input pin for driving

the sled motor stepwise. Both

the positive and negative step

levels (with positive-negative

symmetry) are determined by the

voltage differential between the

pin voltage and the ASPREF pin

voltage.

39

PGND

Output Tr. GND for the four-

channel H bridge drivers. This

pin is not internally connected to

the small-signal system GND.

Continued on next page.

LB8109M

No.5233-7/9

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