IRFH4253DPbF

8

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© 2013 International Rectifier

June 10, 2013

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

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming  j = 25°C and

Tstart = 125°C.

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming Tj = 125°C and

Tstart =25°C (Single Pulse)

1.0E-06

1.0E-05

1.0E-04

1.0E-03

1.0E-02

1.0E-01

1.0E+00

1.0E+01

tav (sec)

0.1

1

10

100

1000

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming  j = 25°C and

Tstart = 125°C.

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming Tj = 125°C and

Tstart =25°C (Single Pulse)

Fig 25.

Typical Avalanche Current vs. Pulse Width (Q1)

1E-006

1E-005

0.0001

0.001

0.01

0.1

1

10

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

Fig 26.

Typical Avalanche Current vs. Pulse Width (Q2)

Fig 27.

Maximum Effective Transient Thermal Impedance, Junction-to-Case (Q1)