AN3361

Definition of the electrical transients and tests

Doc ID 018589 Rev 1

5/15

Pulse 3a (Figure 4) is specified at -150 V but with 50

Ω series resistor and 100 ns duration

which is far less energy than for pulse 1. This means that, if the Schottky diode specification

is compliant with pulse 1, pulse 3a will be covered as well.

Figure 4.

ISO 7637-2 pulse 3a

Table 4.

Parameter values for test pulse 3a

Parameter

12 V system

-112 V to -150 V

50

Ω

0.1 µs

5 ns

100 µs

10 ms

90 ms

U

U

S

S

t

t

t

t

t

4

5

1

d

r

0.1xU

0.9xU

S

S

t

U