LB11995 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LB11995

Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive

SANYO -> Panasonic 

LB11995

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Pin number Pin name Pin voltage

21

VCREF

0V to VCC1

–1.5V

15µA

200Ω

22

22

VC

0V to VCC1

Equivalent circuit

25µA

25µA

51kΩ

15µA

VCC1

200Ω

21

Pin function

Control reference voltage supply

pin. Determines control start

voltage.

Speed control voltage supply pin

V type control technique

VC > VCREF : Forward

VC < VCREF : Slowdown

(Reverse-blocking circuit

prevents reverse rotation.)

23

WOUT

24

PWR GND

1

VOUT

2

UOUT

5

RF

19

LMC

16

BRAKE

3.9Ω

3.9Ω

VCC1

100µA

A12346

VCC2

5

23 1 2

24

A12347

RF

5kΩ

19

15kΩ

7kΩ

VCC1

A12348

75kΩ

16

50kΩ

A12349

W phase output

Output transistor GND

V phase output

U phase output

Upper side output NPN transistor

collector pin (common for all 3

phases). For current detection,

connect resistor between VCC3

pin and RF pin. Constant current

control and current limiter works

by detecting this voltage.

When this pin is connected to GND,

the limiter setting current is

increased by a factor of 1.5.

Short brake pin

BRAKE:

High –> Short brake operation

Low/Open –> Motor drive operation

No. 6112-9/10

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