LB1928

No. 6198-4/11

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

Pin Assignment

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

fFG (servo) = fosc/ (ECL divide-by-16

× count number)

= fosc/8192

–20

0

20

40

60

80

100

120

Ambient temperature, Ta –

°C

0

4

3

8

12

16

20

24

With an arbitrary large heat sink

Without heat sink

Pd max – Ta

27

26

28

24

23

25

21

20

22

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

OUT1

F/R

IN3+ IN3– IN2+ IN2–

OUT2 OUT3 GND2 VCC

VM

IN1+ IN1– GND1

S/S FGIN+ FGIN– FGOUT LD

VREG PWM CSD

XI

XO INTOUT INTIN POUT DOUT

Top view

LB1928