IRF6619PbF

6

www.irf.com

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 temperature far in

3. Equation below based on circuit and waveforms shown in Figures 17a, 17b.

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

during avalanche).

7.

25°C in Figure 14, 15).

Fig 19a. Switching Time Test Circuit

Fig 19b. Switching Time Waveforms

V

GS

V

DS

90%

10%

t

d(on)

t

d(off)

t

r

t

f

Fig 17b. Unclamped Inductive Waveforms

Fig 17a. Unclamped Inductive Test Circuit

tp

Fig 18a. Gate Charge Test Circuit

Fig 18b. Gate Charge Waveform

Vds

Vgs

Id

Vgs(th)

Qgs1 Qgs2

Qgd

Qgodr

Fig 16. Maximum Avalanche Energy Vs. Drain Current

25

50

75

100

125

150

Starting TJ, Junction Temperature (°C)

0

200

400

600

800

1000

I D

TOP

12A

15A

BOTTOM

24A

V

GS

Pulse Width < 1µs

Duty Factor < 0.1%

V

DD

V

DS

L

D

D.U.T

+

-

R G

0.01

Ω

tp

D.U.T

L

VDS

+

- VDD

DRIVER

A

15V

20V

25

50

75

100

125

150

Starting TJ , Junction Temperature (°C)

0

100

200

300

Single Pulse

ID = 24A

1K

VCC

DUT

0

L