Fairchild Semiconductor FAN8400BD3 Datasheet

www.fairchildsemi.com

Rev.1.0.1

Features

• 3-Phase BLDC motor driver IC with speed control

• Phase Locked Loop (PLL) speed control

• Built-in phase locked detector output

• Current linear drive scheme

• External clock for arbitrary motor speed

• Built-in FG amplifier and integrating amplifier

• Auto Gain Control (AGC) circui t for compensation hall amplifier

• Built-in protection circuits (over-current limit, under voltage limit, thermal shut down)

Description

The FAN8400D is a monolithic integrated circuit. it is one driver for laser beam printe r (LBP) polygon mirror motor, which has single chip implementation of all circuits. For extremely high rotational precision, it employs the phase locked loop (PLL) speed control scheme.

28-SSOPH-375SG2

Typical application

• Polygon mirror motor drive IC for laser beam printer

• Polygon mirror motor drive IC for facsimile

• Polygon mirror motor drive IC for duplicator

• Polygon mirror motor driv e IC for multi function printer

• General 3 phase BLDC motor drive IC

Ordering Information

Device Package Operating Temp

FAN8400BD3 28-SSOPH-375SG2 −20°C ~ +80°C

FAN8400BD3TF 28-SSOPH-375SG2 −20°C ~ +80°C

FAN8400D (FAN8400BD3)

3-Phase BLDC Motor Driver with PLL

FAN8400D (FAN8400BD3)

2

Pin Assignments

AGC

FIN

1

2

3

4

5

6

7

8

9

10

11

12

13

14

FIN

28

27

26

25

24

23

22

21

20

19

18

17

16

15

FG

IN-

FG

S

FG

OUT

S/S

NC

SGND

LD

ECLK

PD

E

I

E

O

F

C

NC

V

REG

V

CC

PGND

R

F

U

V

W

H

V+

H

V-

H

U+

H

U-

H

W+

H

W-

FAN8400D

NC

FAN8400D (FAN8400BD3)

3

Pin Definitions

Pin Number Pin Name Pin Function Description

1 AGC AGC amplifier frequency characteristics correction 2FG

IN-

FG amplifier inverting input

3FG

S

FG pulse output

4FG

OUT

FG amplifier output 5 S/S Stop and start 6NC 7NC 8 SGND Signal ground 9 LD Phase locked loop detector output

10 ECLK External clock 11 PD Phase locked loop detector output 12 E

I

Error amplifier inverting input

13 E

O

Error amplifier output

14 F

C

Control amplifier frequency correction

15 NC 16 V

REG

Regulator voltage stabilization output

17 V

CC

Power supply

18 PGND Power ground 19 R

F

Output current detection

20 U U output 21 V V output 22 W W output 23 H

V+

V hall amplifier non inverting input

24 H

V-

V hall amplifier inverting input

25 H

U+

U hall amplifier non inverting input

26 H

U-

U hall amplifier inverting input

27 H

W+

W hall amplifier non inverting input

28 H

W-

W hall amplifier inverting input

FAN8400D (FAN8400BD3)

4

Internal Block Diagram

AGC

FIN

1

2

3

4

5

6

7

8

9

10

11

12

13

14

FIN

28

27

26

25

24

23

22

21

20

19

18

17

16

15

FG

IN-

FG

S

FG

OUT

S/S

NC

SGND

LD

ECLK

PD

E

I

E

O

F

C

NC

V

REG

V

CC

PGND

R

F

U

V

W

H

V+

H

V-

H

U+

H

U-

H

W+

H

W-

V

REG

2

V

REG

2

Regulator

Output

Controller

Hall

AMP

Matrix

AGC

Clock

PLL

Lock

Detector

TSD &

UVLO

-

+

S/S

-

+

-

+

OCL

V-type

Control

NC

FAN8400D (FAN8400BD3)

5

Absolute Maximum Ratings (Ta = 25°°°°C)

Recommended Operating Conditions (Ta = 25°°°°C)

Parameter Symbol Value Unit Remark

Maximum supply voltage V

CCMAX

30 V -

Maximum output current I

OMAX

0.6 A Power dissipation Pd 1.7 W Operating temperature T

OPR

−20 ~ +80 °C-

Storage temperature T

STG

−50 ~ +150 °C-

Parameter Symbol Min. Typ. Max. Unit

Operating voltage range V

CC

20 24 28 V