LB1928

No.6197-4/11

Package Dimensions

unit : mm (typ)

3147C

Pin Assignment

28

27

26

25

24

23

22

21

20

19

18

17

16

15

LB1928

OUT1

F/R

IN3-

IN3+

IN2+

IN1+

IN1-

GND1

S/S

FGIN+ FGIN- FGOUT LD

IN2-

12

3

4

5

6

7

8

9

10

11

12

13

14

OUT2 OUT3

VCC

GND2

VM

PWM

CSD

XI

XO

INTOUT INTIN POUT DOUT

VREG

Top view

Relationship between crystal oscillator frequency fOSC and FG frequency fFG is as follows.

fFG (servo) = fOSC/ (ECL divide-by-16×count number)

= fOSC/8192

Truth Table

Source

F/R = “L”

F/R = “H”

Sink

IN1

IN2

IN3

IN1

IN2

IN3

1

OUT2

→OUT1

H

L

H

L

H

L

2

OUT3

→OUT1

H

L

L

L

H

H

3

OUT3

→OUT2

H

H

L

L

L

H

4

OUT1

→OUT2

L

H

L

H

L

H

5

OUT1

→OUT3

L

H

H

H

L

L

6

OUT2

→OUT3

L

L

H

H

H

L

3

0

4

8

12

16

20

24

-20

0

20

40

60

80

100

Without heat sink

Ambient temperature, Ta --

°C

Pd max -- Ta

With an arbitrary large heat sink