IRFS7440PBF International Rectifier, IRFS7440PBF Datasheet - Page 6

• Manufacturer Part Number: IRFS7440PBF
• Description: MOSFET 40V, 120A, 2.5 mOhm 90 nC Qg, D2-Pak
• Manufacturer: International Rectifier

Specifications of IRFS7440PBF

• Rohs: yes
• Transistor Polarity: N-Channel
• Drain-source Breakdown Voltage: 40 V
• Continuous Drain Current: 208 A
• Resistance Drain-source Rds (on): 2.5 mOhms
• Maximum Operating Temperature: + 175 C
• Mounting Style: SMD/SMT
• Package / Case: D2PAK
• Fall Time: 68 ns
• Forward Transconductance Gfs (max / Min): 88 S
• Gate Charge Qg: 135 nC
• Minimum Operating Temperature: - 55 C
• Power Dissipation: 208 W
• Rise Time: 68 ns
• Tradename: StrongIRFET
• Typical Turn-off Delay Time: 115 ns

October 10, 2012
6
Fig 16. Maximum Avalanche Energy vs. Temperature
250
200
150
100
50
0
25
1000
0.001
100
0.01
10
0.1
1.0E-06
1
Starting T J , Junction Temperature (°C)
1E-006
1
50
Fig 14. Maximum Effective Transient Thermal Impedance, Junction-to-Case
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming  j = 25°C and
Tstart = 150°C.
D = 0.50
0.20
0.10
0.05
0.01
0.02
TOP
BOTTOM 1.0% Duty Cycle
I D = 100A
75
100
Single Pulse
1.0E-05
SINGLE PULSE
( THERMAL RESPONSE )
1E-005
Fig 15. Typical Avalanche Current vs.Pulsewidth
125
150
175
t 1 , Rectangular Pulse Duration (sec)
1.0E-04
0.0001
Notes on Repetitive Avalanche Curves , Figures 14, 15:
(For further info, see AN-1005 at www.irf.com)
1. Avalanche failures assumption:
2. Safe operation in Avalanche is allowed as long asT
3. Equation below based on circuit and waveforms shown in Figures 16a, 16b.
4. P
5. BV = Rated breakdown voltage (1.3 factor accounts for voltage increase
6. I
7. T
Purely a thermal phenomenon and failure occurs at a temperature far in
excess of T
during avalanche).
25°C in Figure 14, 15).
t
D = Duty cycle in avalanche = t
Z
tav (sec)
av
av =
thJC
D (ave)
= Allowable avalanche current.
=
Average time in avalanche.
(D, t
Allowable rise in junction temperature, not to exceed T
= Average power dissipation per single avalanche pulse.
av
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming Tj = 150°C and
Tstart =25°C (Single Pulse)
) = Transient thermal resistance, see Figures 13)
1.0E-03
jmax
0.001
. This is validated for every part type.
P
D (ave)
= 1/2 ( 1.3·BV·I
I
E
av
AS (AR)
Notes:
1. Duty Factor D = t1/t2
2. Peak Tj = P dm x Zthjc + Tc
= 2DT/ [1.3·BV·Z
av
1.0E-02
·f
= P
0.01
D (ave)
av
) = DT/ Z
·t
th
av
]
jmax
thJC
jmax
is not exceeded.
1.0E-01
(assumed as
0.1
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