Электронный компонент: FAN8728

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�2002 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev. 1.0.0

Features

!

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Description

/012*1" "3 %

# " 4+%"

+" +, "

" % & 5/!&5/!0/.6/60

"7" -

48-QFPH-1414

Typical Applications

&"4 7

. "4 7

&"4 7

07"

Ordering Information

Device

Package

Operating Temp

FAN8728

48-QFPH-1414

-

5

�

C ~ 8

�

C

FAN8728

Spindle + 4-CH Input PWM Motor Drive IC

FAN8728

2

Pin Assignments

1

2

3

4

5

6

48

47

46

45

44

43

42

40

39

38

41

37

36

35

34

33

32

31

30

28

27

26

29

25

13

14

15

16

17

18

19

21

22

23

20

24

7

8

9

10

11

12

FAN8728

3

Pin Definitions

Pin Number

Pin Name

I/O

Pin Function Descrition

1

H1+

I

Hall1(+) Input

2

H1-

I

Hall1(-) Input

3

H2+

I

Hall2(+) Input

4

H2-

I

Hall2(-) Input

5

H3+

I

Hall3(+) Input

6

H3-

I

Hall3(-) Input

7

FG

O

FG Output

8

DIR

O

Direction

9

SVCC1

-

SIGNAL VCC1

10

VM1

-

Motor Power Supply

11

CS1

I

Current Sensor

12

PGND1

-

Power Ground

13

A3

O

3-Phase Output 3

14

A2

O

3-Phase Output 2

15

A1

O

3-Phase Output 1

16

SGND

-

Signal Ground

17

IN3+

I

Op-amp CH3 Input(+)

18

IN3-

I

Op-amp CH3 Input(-)

19

OUT3

O

Op-amp CH3 Output

20

IN2+

I

Op-amp CH2 Input(+)

21

IN2-

I

Op-amp CH2 Input(-)

22

OUT2

O

Op-amp CH2 Output

23

VM2

-

BTL CH1,2 Supply Voltage

24

IN2+

I

Op-amp CH2 Input(+)

25

IN2-

I

Op-amp CH2 Input(-)

26

OUT2

O

Op-amp CH2 Output

27

DO1+

O

BTL Drive 1 Output(+)

28

DO1-

O

BTL Drive 1 Output(-)

29

DO2+

O

BTL Drive 2 Output(+)

30

DO2-

O

BTL Drive 2 Output(-)

31

PGND2

-

BTL Power Gnd

32

DO3+

O

BTL Drive 3 Output(+)

33

DO3-

O

BTL Drive 3 Output(-)

FAN8728

4

Pin Definitions

(Continued)

Pin Number

Pin Name

I/O

Pin Function Descrition

34

DO4+

O

BTL Drive 4 Output(+)

35

DO4-

O

BTL Drive 4 Output(-)

36

IN4

I

BTL CH4 Input

37

VREF4

I

BTL CH4 Reference

38

VM4

-

BTL CH4 Motor Supply

39

VM3

-

BTL CH3 Motor Supply

40

SVCC2

-

BTL Signal VCC

41

VREF123

I

BTL CH1,2,3 Rference

42

MUTE123

I

BTL CH1,2,3 Mute

43

MUTE4

I

BTL CH4 Mute

44

SS

I

Spindle Start/Stop

45

OUTS

O

Opamp Spindle Output

46

INS-

I

Opamp Spindle Input(-)

47

INS+

I

Opamp Spindle Input(+)

48

PC1

I

Phase Compesation Cap.

FAN8728

5

Internal Block Diagram

48

45

46

47

43

44

42

41

40

39

38

37

13

16

15

14

18

17

19

20

21

22

23

24

36

33

34

35

31

32

30

29

28

27

26

25

1

4

3

2

6

5

7

8

9

10

11

12

Distributor

Driver

PGND1

CS1

SVCC1

VM1

DIR

FG

H3+

H2-

H2+

H1+

H1-

H3-

PC1

INS-

INS+

A3

A2

A1

VM3

DO3-

SVCC2

M

U

T

E

123

Hall Amp

DO3+

DO2-

DO2+

Absolute Values

Current
Sense Amp

Output
Current Limit

CS1

VM1

FG1X

Generator

Logic

Detection

Reverse
Rotation

PGND2

IN3+

IN2+

IN2-

SGND

OUT2

IN1+

IN3-

OUT3

SS

MUTE4

(LOADING)

DO1-

DO1+

OUT1

VM4

VM3

VM2

VM2

FIN(GND)

FIN(GND)

FIN(GND)

FIN(GND)

VM2

IN1-

VM4

IN4

DO4+

DO4-

VREF4

OUTS

VREF123