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IRF1407S Scheda tecnica(PDF) 7 Page - International Rectifier

Il numero della parte IRF1407S
Spiegazioni elettronici  Power MOSFET(Vdss = 75V, Rds(on) = 0.0078?? Id = 100A??
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Produttore elettronici  IRF [International Rectifier]
Homepage  http://www.irf.com
Logo IRF - International Rectifier

IRF1407S Scheda tecnica(HTML) 7 Page - International Rectifier

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IRF1407S/IRF1407L
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7
Fig 15. Typical Avalanche Current Vs.Pulsewidth
Fig 16. Maximum Avalanche Energy
Vs. Temperature
Notes on Repetitive Avalanche Curves , Figures 15, 16:
(For further info, see AN-1005 at www.irf.com)
1. Avalanche failures assumption:
Purely a thermal phenomenon and failure occurs at a
temperature far in excess of Tjmax. This is validated for
every part type.
2. Safe operation in Avalanche is allowed as long asTjmax is
not exceeded.
3. Equation below based on circuit and waveforms shown in
Figures 12a, 12b.
4. PD (ave) = Average power dissipation per single
avalanche pulse.
5. BV = Rated breakdown voltage (1.3 factor accounts for
voltage increase during avalanche).
6. Iav = Allowable avalanche current.
7.
∆T = Allowable rise in junction temperature, not to exceed
Tjmax (assumed as 25°C in Figure 15, 16).
tav = Average time in avalanche.
D = Duty cycle in avalanche = tav ·f
ZthJC(D, tav) = Transient thermal resistance, see figure 11)
PD (ave) = 1/2 ( 1.3·BV·Iav) = ∆
∆∆∆∆T/ ZthJC
Iav = 2∆
∆∆∆∆T/ [1.3·BV·Z
th]
EAS (AR) = PD (ave)·tav
1.0E-07
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
tav (sec)
1
10
100
1000
0.05
Duty Cycle = Single Pulse
0.10
Allowed avalanche Current vs
avalanche
pulsewidth,
tav
assuming
∆ Tj = 25°C due to
avalanche losses
0.01
25
50
75
100
125
150
175
Starting T J , Junction Temperature (°C)
0
100
200
300
400
TOP
Single Pulse
BOTTOM 10% Duty Cycle
ID = 78A


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