LB11699H 查看數據表（PDF） - SANYO -> Panasonic

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LB11699H

For CD-ROM Drives Spindle Motor Driver IC

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Pin

Pin

voltage

3

FC

LB11699H

Description

Control loop frequency characteristics

correction

Current control system closed loop oscillations

can be prevented by connecting a capacitor

between this pin and ground.

Equivalent Circuit

VCC1

2kΩ

3

20kΩ 5kΩ

2

VCREF

0V

Control system reference voltage input

to

VCC1-1.5V

The control system start voltage is determined

VCC1

by this voltage.

1

VC

0V

Speed control voltage input

15μA 25μA

15μA

25μA

to

VCC1

This is a voltage controlled system in which:

The motor turns in the forward direction when

VC > VCREF, and

1

51kΩ

200Ω

2

The motor turns decelerates when VC <

VCREF.

100μA

(Since the LB11699H includes a reverse

rotation prevention circuit, the motor will never

turn in the reverse direction.)

22

WOUT

W phase output

FRAME

GND

21

VOUT

20

UOUT

Output transistor ground

V phase output

U phase output

3.9Ω

VCC2

18

18

RF

High side output transistor collector (common

to all three phases)

3.9Ω

20 21 22

Connect a resistor between the RF pin and

VCC3 for current detection.

The LB11699H detects this voltage to operate

the constant current control and current limiter

functions.

27

VLMC

0

This pin determines the current limiter set

to

voltage. The current limiter set voltage can be

1.3V

changed by applying a voltage to this pin.

FRAME GND

VCC1

6μA

6μA

6μA

200Ω

27

6pF

28

VREF

Reference voltage (1.25V typical) output

28

VCC1

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No. 8315 -8/9

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