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IRF6718L2TR1PBF Folha de dados(PDF) 6 Page - International Rectifier

Nome de Peças IRF6718L2TR1PBF
Descrição Electrónicos  RoHS Compliant Containing No Lead and Bromide
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Fabricante Electrônico  IRF [International Rectifier]
Página de início  http://www.irf.com
Logo IRF - International Rectifier

IRF6718L2TR1PBF Folha de dados(HTML) 6 Page - International Rectifier

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IRF6718L2TR/TR1PbF
6
www.irf.com
Fig 16. Typical Avalanche Current vs.Pulsewidth
Fig 17. Maximum Avalanche Energy
vs. Temperature
Notes on Repetitive Avalanche Curves , Figures 16, 17:
(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 19a, 19b.
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.
ΔT = Allowable rise in junction temperature, not to exceed
Tjmax (assumed as 25°C in Figure 16, 17).
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) = DT/ ZthJC
Iav = 2
DT/ [1.3·BV·Zth]
EAS (AR) = PD (ave)·tav
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)
0.01
0.1
1
10
100
1000
0.05
Duty Cycle = Single Pulse
0.10
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming
Δ Tj = 25°C and
Tstart = 150°C.
0.01
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming DTj = 150°C and
Tstart =25°C (Single Pulse)
25
50
75
100
125
150
175
Starting TJ , Junction Temperature (°C)
0
100
200
300
400
500
600
Single Pulse
ID = 49A


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