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IRFS4410PBF Datasheet(Folha de dados) 5 Page - International Rectifier

Nome de Peças. IRFS4410PBF
descrição  HEXFET Power MOSFET
Download  11 Pages
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Fbricantes  IRF [International Rectifier]
Página de início  http://www.irf.com
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IRFB/S/SL4410PbF
www.irf.com
5
Fig 13. Maximum Effective Transient Thermal Impedance, Junction-to-Case
Fig 14. Typical Avalanche Current vs.Pulsewidth
Fig 15. Maximum Avalanche Energy vs. Temperature
Notes on Repetitive Avalanche Curves , Figures 14, 15:
(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 as neither Tjmax nor Iav (max)
is exceeded.
3. Equation below based on circuit and waveforms shown in Figures 16a, 16b.
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 14, 15).
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) = DT/ ZthJC
Iav = 2
DT/ [1.3·BV·Zth]
EAS (AR) = PD (ave)·tav
1E-006
1E-005
0.0001
0.001
0.01
0.1
t1 , Rectangular Pulse Duration (sec)
0.0001
0.001
0.01
0.1
1
0.20
0.10
D = 0.50
0.02
0.01
0.05
SINGLE PULSE
( THERMAL RESPONSE )
Notes:
1. Duty Factor D = t1/t2
2. Peak Tj = P dm x Zthjc + Tc
Ri (°C/W)
τi (sec)
0.2736
0.000376
0.3376
0.004143
τ
J
τ
J
τ
1
τ
1
τ
2
τ
2
R
1
R
1
R
2
R
2
τ
τ
C
Ci
i
/Ri
Ci=
τi/Ri
25
50
75
100
125
150
175
Starting TJ , Junction Temperature (°C)
0
50
100
150
200
250
TOP
Single Pulse
BOTTOM 1% Duty Cycle
ID = 58A
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
tav (sec)
0.1
1
10
100
1000
0.05
Duty Cycle = Single Pulse
0.10
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming
∆Τ j = 25°C and
Tstart = 150°C.
0.01
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming
∆Tj = 150°C and
Tstart =25°C (Single Pulse)




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