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IRFS7537PBF データシート(PDF) 6 Page - International Rectifier

部品番号 IRFS7537PBF
部品情報  Brushed Motor drive applications
PDF  13 Pages
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メーカー  IRF [International Rectifier]
ホームページ  http://www.irf.com
Logo IRF - International Rectifier

IRFS7537PBF データシート(HTML) 6 Page - International Rectifier

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© 2014 International Rectifier
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October 7, 2014
 
IRFB/S/SL7537PbF
Fig 14. Maximum Effective Transient Thermal Impedance, Junction-to-Case
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
23a, 23b.
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 14)
PD (ave) = 1/2 ( 1.3·BV·Iav) = T/ ZthJC
Iav = 2T/ [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
25
50
75
100
125
150
175
Starting TJ , Junction Temperature (°C)
0
50
100
150
200
250
300
TOP
Single Pulse
BOTTOM 1.0% Duty Cycle
ID = 100A
Fig 15. Avalanche Current vs. Pulse Width
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
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming
 j = 25°C and
Tstart = 150°C.
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming
Tj = 150°C and
Tstart =25°C (Single Pulse)



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