Choosing the appropriate Schottky diode

AN3361

10/15

Doc ID 018589 Rev 1

Table 5 gives a matrix of which Schottky diode is compatible with load-dump surge (pulse

with load-dump surge duration of 300 ms.

2.2

Most severe negative surge compatibility criteria

Now if we consider pulse 1 as shown in Figure 3, things are different since the Schottky

diode is reverse polarized.

For instance, the voltage applied on a diode with a maximum repetitive reverse voltage

Figure 8.

Example of application with pulse 1 using an STPS5H100BY

Table 5.

Which Schottky diodes are good for which load-dump surge level

24

30

364248

STPS160AY

Yes

STPS3L60SY

Yes

Yes

STPS20L60CGY

Yes

Yes

Yes

Yes

Yes

STPS1H100UY

Yes

STPS2H100UY

Yes

Yes

STPS5H100BY

Yes

Yes

Yes

STPS8H100GY

Yes

Yes

Yes

Yes

Yes

Electronic module

I

STPS5H100BY

V

RRM

Pulse 1:

V

= 13.5 V

V

= -100

R = 10

t = 2 ms

bat

surge

i

p

Ω

V = 13.5 V

c