LCDP1521

6/11

4

Table 1.

Test circuit component values

5

Technical information

Figure 2.

LCDP1521 concept behavior.

Figure 2 shows the classical protection circuit using the LCDP1521 crowbar concept. This

topology has been developed to protect the new high voltage SLICs. This supports the

programming of the negative firing threshold while the positive clamping value is fixed at GND.

Pulse (µs)

L

tr

tp

(V)

(

µF)

(nF)

(

µH)

(

Ω)(Ω)(Ω)(Ω)(A)

(

Ω)

10

700

1500

20

200

0

50

15

25

25

10

110

1.2

50

1500

1

33

0

761325

25

1560

2

10

2500

10

0

1.1

1.3

0

3

3

10

245

TIP

RING

GND

L

(V is defined in unload condition)

P

GND

Gate

TIP

RING

GND

-Vbat

C

Rs1

Rs2

L 1

L 2

V Tip

Th1

D1

T1

IG

ID1