IRFB5615PbF

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5

Fig 13. Maximum Avalanche Energy Vs. Drain Current

Fig 12. On-Resistance Vs. Gate Voltage

Fig 14. Typical Avalanche Current Vs.Pulsewidth

Fig 15. Maximum Avalanche Energy Vs. Temperature

Notes on Repetitive Avalanche Curves , Figures 14, 15:

(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.

2. Safe operation in Avalanche is allowed as long as neither

Tjmax nor Iav (max) is exceeded

3. Equation below based on circuit and waveforms shown in

Figures 17a, 17b.

avalanche pulse.

voltage increase during avalanche).

7.

4

6

8

10

12

14

16

18

20

VGS, Gate -to -Source Voltage (V)

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

ID = 21A

TJ = 25°C

TJ = 125°C

1.0E-06

1.0E-05

1.0E-04

1.0E-03

1.0E-02

1.0E-01

tav (sec)

0.1

1

10

100

0.05

Duty Cycle = Single Pulse

0.10

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming

∆Τ j = 25°C and

Tstart = 150°C.

0.01

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming

∆Tj = 150°C and

Tstart =25°C (Single Pulse)

25

50

75

100

125

150

175

Starting TJ , Junction Temperature (°C)

0

50

100

150

200

250

300

350

400

450

500

ID

TOP

2.8A

5.3A

BOTTOM 21A

25

50

75

100

125

150

175

Starting TJ , Junction Temperature (°C)

0

20

40

60

80

100

120

TOP

Single Pulse

BOTTOM 1.0% Duty Cycle

ID = 21A