IRFR/U540ZPbF

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5

Fig 11. Maximum Effective Transient Thermal Impedance, Junction-to-Case

Fig 9. Maximum Drain Current vs.

CaseTemperature

Fig 10. Normalized On-Resistance

vs. Temperature

25

50

75

100

125

150

175

TC , CaseTemperature (°C)

0

10

20

30

40

1E-006

1E-005

0.0001

0.001

0.01

0.1

t1 , Rectangular Pulse Duration (sec)

0.001

0.01

0.1

1

10

0.20

0.10

D = 0.50

0.02

0.01

0.05

SINGLE PULSE

( THERMAL RESPONSE )

Notes:

1. Duty Factor D = t1/t2

2. Peak Tj = P dm x Zthjc + Tc

Ri (°C/W)

τi (sec)

2.626

0.000052

0.6611 0.001297

0.7154 0.01832

τ

J

τ

J

τ

1

τ

2

τ

3

R

1

R

1

R

2

R

2

R

3

R

3

τ

τ

C

Ci

i

/Ri

Ci=

τi/Ri

-60 -40 -20 0

20 40 60 80 100 120 140 160 180

TJ , Junction Temperature (°C)

0.5

1.0

1.5

2.0

2.5

ID = 21A

VGS = 10V