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IRF1407LPbF 데이터시트(PDF) 7 Page - Infineon Technologies AG

부품명 IRF1407LPbF
상세설명  HEXFET짰 Power MOSFET
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제조업체  INFINEON [Infineon Technologies AG]
홈페이지  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

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IRF1407S/LPbF
7
2016-5-26
 
Fig 15. Typical Avalanche Current vs. Pulse width
Notes on Repetitive Avalanche Curves , Figures 15, 16:
(For further info, see AN-1005 at www.infineon.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 as Tjmax 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 Figures 13)
PD (ave) = 1/2 ( 1.3·BV·Iav) = T/ ZthJC
Iav = 2T/ [1.3·BV·Zth]
EAS (AR) = PD (ave)·tav
Fig 16. Maximum Avalanche Energy
vs. Temperature
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 TJ , Junction Temperature (°C)
0
100
200
300
400
TOP
Single Pulse
BOTTOM 10% Duty Cycle
ID = 78A


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