AN3361

Choosing the appropriate Schottky diode

Doc ID 018589 Rev 1

9/15

Figure 7.

Equivalent sinusoidal surface of clamped load-dump surge surface

2.1.3

Using the equations:

Equation 9

following law from Equation 9 can be used:

Equation 10

Where:

Equation 11

t

sin

t1

I0

I0/2

tI0/2

0

0.1

0.2

0

10

20

30

40

I

(t)

surge

I

t, ti

3

4

FS M

sin

4

FS M @ ts in

10·1 0

I

t

I

−

×

=

×

3

4

3

FSM@140ms

sin

FSM

4

3

4

4

FSM@140ms

140·10

220

10·10

I

t

I

10·10

I

−

−

−

×

=

×

=