IRF7171MTRPbF

6

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March 25, 2015

Fig 15.  Maximum Effective Transient Thermal Impedance, Junction-to-Case  

Fig 14. Typical Avalanche Current vs. Pulse Width

Notes:



Surface mounted on 1 in. square Cu board, steady state.





Repetitive rating; pulse width limited by max. junction temperature.



Surface mounted on 1 in. square Cu

board (still air).



Mounted on minimum footprint full size board with metalized

back and with small clip heatsink (still air)



Used double sided cooling, mounting pad with large heatsink.



Mounted on minimum footprint full size board with metalized

back and with small clip heatsink.



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

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

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)

0.05

0.10

D = 0.01

Single Pulse