IRFR1010Z 查看數據表（PDF） - Kersemi Electronic Co., Ltd.
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IRFR1010Z Datasheet PDF : 11 Pages
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1000
Duty Cycle = Single Pulse
100
0.01
10
0.05
0.10
1
IRFR/U1010Z
Allowed avalanche Current vs
avalanche pulsewidth, tav
assuming ∆Tj = 25°C due to
avalanche losses
0.1
1.0E-06
1.0E-05
1.0E-04
tav (sec)
1.0E-03
1.0E-02
Fig 15. Typical Avalanche Current vs.Pulsewidth
1.0E-01
120
100
80
60
40
20
0
25
Notes on Repetitive Avalanche Curves , Figures 15, 16:
TOP
Single Pulse
(For further info, see AN-1005 at www.irf.com)
BOTTOM 1% Duty Cycle
1. Avalanche failures assumption:
ID = 42A
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.
50
75
100 125 150 175 D = Duty cycle in avalanche = tav ·f
Starting TJ , Junction Temperature (°C)
ZthJC(D, tav) = Transient thermal resistance, see figure 11)
Fig 16. Maximum Avalanche Energy
vs. Temperature
PD (ave) = 1/2 ( 1.3·BV·Iav) = DT/ ZthJC
Iav = 2DT/ [1.3·BV·Zth]
EAS (AR) = PD (ave)·tav
2014-8-23
7
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