7

4749C–AUTO–09/05

B10011S

Figure 6-1.

Test Circuit

Figure 6-2.

Application Circuit

The implementation of a power filter and overvoltage clamp as follows is highly recommended:

H/L

H/L

H/L

470

470

470

150k

220

1k8

1k8

580

620

V

IL

B10011S

F

1

F

0

S+

H'

L'

2.5 V

+4.3 V

GND

V

CC

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

S-

T

x0

R

x0

ER

B

sel

Select

control

Compa-

rators

Error

control

Output

control

2k5

V

DD

V

DD

V

DD

V

DD

V

SS

A

sel

V

CC

V

CC

V

CC

V

CC

V

IH

H

L

M

+5 V

ER

+

+

10 µF

24k

82p

47p

16k

22k

BCX 17

1k8

1k8

1k8

1k8

1k8

1k8

220

270

10µ

40 V

V

DD

0µ1

Resistors:

MELF 0204, 1%, 0.6 W

02075, 1%, TK50

Chip capacitors NPO 0805, 1206, 10%

Ferrite bead BLM 31A601S (Murata)

Common-mode choke coils (SMD):

B82790 S0513 N201 (Siemens)

F2 2x50 µH (Vogt)

ST2001 (Vogt)

Battery ground

Filter ground

Output

control

Compa-

rators

Select

control

Error

control

GND

2.5 V

+4.3 V

Filter for 125 kbit/s operation

5k6

5k6

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

24k

82p

47p

22k

16k

2n2

150k

A

sel

B

sel

R

x1

R

x0

T

x0

V

CC

V

SS

V

DD

V

SS

V

DD