LB1996 データシートの表示（PDF） - SANYO -> Panasonic

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LB1996

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

SANYO -> Panasonic 

LB1996

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Pin number Pin name Pin voltage

21

VCREF

2V to 3V

22

VC

0V to VCC1

Equivalent circuit

22

200Ω

25µA

25µA

10kΩ

30kΩ

15kΩ

30kΩ

100µA

200Ω

100µA

VCC1

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

FGCSCEL

16

BRAKE

3.9Ω

3.9Ω

100µA

75kΩ

50kΩ

75kΩ

50kΩ

VCC2

5

23 1 2

24

VCC1

19

VCC1

16

A11177

A11178

A11179

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.

3 Hall FG/1 Hall FG switching

pin

FGSEL

High –> 3 Hall FG

Low/Open –> 1 Hall FG

Short brake pin

BRAKE:

High –> Short brake operation

Low/Open –> Motor drive operation

A11180

No. 5977-8/9

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