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12 k

Ω

15 nF

MGX379

15 nF

100

nF

CONTROL

AND

HANDSHAKE

DRIVER

HIGH

TDA8928J

TEMPERATURE SENSOR

AND

CURRENT PROTECTION

DRIVER

LOW

temp

current

4

7

VSS1

VSS1

VREL2

VSS2

VDD2

6

1

2

9

810

VDD2

VDD1

13

5

CONTROL

AND

HANDSHAKE

DRIVER

HIGH

DRIVER

LOW

14

11

12

17

16

3

15

EN1

DIAG

REL1

SW1

SW2

REL2

POWERUP

EN2

BOOT1

2VP

OUT1

STAB

OUT2

VOUT2

VOUT1

BOOT2

12 V

V

V

V

VSW2

VREL1

V

VSW1

VEN

VDIAG

V

VSTAB

V

12 V

0

12 V

0

Fig.4 Test diagram.