AN3361

Choosing the appropriate Schottky diode

Doc ID 018589 Rev 1

7/15

Figure 6.

The equations below apply to the circuit shown in Figure 5.

Equation 1

conduction losses in a power rectifier”. Values are provided in the datasheets.

Then:

Equation 2

series resistor is 0.5

Ω, the battery voltage is 12 V and the protection voltage clamping level

Equation 3

V

cl

C1

I

p

I

p

Measure

value

status

P1:max(C1)

29.9 V

P2:max(C2)

35.9 V

P3:mean(F1)

P4:rise@Iv(C3)

P5:---

P6:---

max

max

10.0 V/div

-30.20 V ofst

10.0 V/div

-30.20 V ofst

10.0 V/div

-30.00 V ofst

10.0 V/div

-30.00 V ofst

50.0 ms/div

50.0 kS

100 kS/s

50.0 ms/div

50.0 kS

100 kS/s

C2

Stop

16.8 V

Edge

Positive

Stop

16.8 V

Edge

Positive

bat

g

surge

V

V

V

+

=

p

i

p

F

cl

surge

I

R

)

(I

V

V

V

+

+

=

p

d

T0

p

F

·I

R

V

)

(I

V

+

=

i

d

T0

cl

surge

p

R

R

V

V

V

I

+

−

−

=

0.5

0.009

29.9

12)

(36

I

p

+

−

+

=