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IRFR7440TRPBF Datasheet(PDF) 6 Page - International Rectifier

Part # IRFR7440TRPBF
Description  Brushed Motor drive applications
Download  11 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IRFR7440TRPBF Datasheet(HTML) 6 Page - International Rectifier

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IRFR/U7440PbF
6
www.irf.com
© 2012 International Rectifier
October 17, 2012
Fig 14. Maximum Effective Transient Thermal Impedance, Junction-to-Case
Fig 15. Typical Avalanche Current vs.Pulsewidth
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.
ΔT = 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 14)
PD (ave) = 1/2 ( 1.3·BV·Iav) =
DT/ ZthJC
Iav = 2DT/ [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)
0.001
0.01
0.1
1
10
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
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
ΔΤ j = 25°C and
Tstart = 150°C.
Allowed avalanche Current vs avalanche
pulsewidth, tav, assuming
ΔTj = 150°C and
Tstart =25°C (Single Pulse)
25
50
75
100
125
150
175
Starting TJ , Junction Temperature (°C)
0
20
40
60
80
100
120
140
160
180
TOP
Single Pulse
BOTTOM 1.0% Duty Cycle
ID = 90A


Similar Part No. - IRFR7440TRPBF

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International Rectifier
IRFR7440TRPBF IRF-IRFR7440TRPBF Datasheet
298Kb / 11P
   Brushed Motor drive applications
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