30WQ03FN datasheet(4/6 Pages) IRF

4 / 6 page

30WQ03FN

PD-20559 rev. B 10/98

www.irf.com

Fig.5-Maximum Allowable Case Temperature

Vs. Average Forward Current

Fig.6-Forward Power Loss Characteristics

Fig.7-Maximum Non-Repetitive Surge Current

(2) Formula used: T

= T

- (Pd + Pd

REV

) x R

thJC

;

Pd = Forward Power Loss = I

F(AV) x VFM @ (IF(AV) / D)

(see Fig. 6);

REV

= Inverse Power Loss = V

x I

(1 - D); I

@ V

= 80% rated V

100

1000

100

1000

10000

Square Wave Pulse Duration - t

(microsec)

At Any Rated Load Condition

And With Rated V

Applied

Following Surge

RRM

120

125

130

135

140

145

150

00. 5 11.5 22.5 33. 5 4 4.5 5 5.5

F(AV)

see note (2)

Square wave (D = 0.50)

80% Rated V

applied

Average Forward Current - I

(A)

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

2.2

F(AV)

RMS Limit

Average Forward Current - I

(A)

D = 0.20

D = 0.25

D = 0.33

D = 0.50

D = 0.75

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