IRLL024NQ

8

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Fig 19. Typical Avalanche Current Vs.Pulsewidth

Fig 20. Maximum Avalanche Energy

Vs. Temperature

Notes on Repetitive Avalanche Curves , Figures 15, 16:

(For further info, see AN-1005 at www.irf.com)

1. Avalanche failures assumption:

Purely a thermal phenomenon and failure occurs at a

every part type.

not exceeded.

3. Equation below based on circuit and waveforms shown in

Figures 12a, 12b.

avalanche pulse.

5. BV = Rated breakdown voltage (1.3 factor accounts for

voltage increase during avalanche).

7.

∆∆∆∆T/ Z

thJC

∆∆∆∆T/ [1.3·BV·Z

1.0E-08

1.0E-07

1.0E-06

1.0E-05

1.0E-04

1.0E-03

1.0E-02

1.0E-01

1.0E+00

1.0E+01

1.0E+02

1.0E+03

tav (sec)

0.001

0.01

0.1

1

10

100

1000

0.05

Duty Cycle = Single Pulse

0.10

Allowed avalanche Current vs

avalanche

pulsewidth,

tav

assuming

∆ Tj = 25°C due to

avalanche losses

0.01

25

50

75

100

125

150

175

Starting T J , Junction Temperature (°C)

0

10

20

30

40

50

60

70

80

90

TOP

Single Pulse

BOTTOM 10% Duty Cycle

ID = 3.1A