IRF7855TRPBF Datasheet, PDF (5/8 Pages) International Rectifier – Primary Side Switch in Bridge Topology in Isolated DC-DC Converters

IRF7855PbF
12
10
8
6
4
2
0
25
50
75
100 125 150
TA , Ambient Temperature (°C)
Fig 9. Maximum Drain Current vs.
Ambient Temperature
V_DS
V_GS
R_G
R_D
D.U.T.
10V
Pulse Width ≤ 1 µs
Duty Factor ≤ 0.1 %
+_-VDD
Fig 10a. Switching Time Test Circuit
V_DS
90%
10%
V_GS
t_d(on) t_r
t_d(off) t_f
Fig 10b. Switching Time Waveforms
100
D = 0.50
10
0.20
0.10
0.05
1
0.02
0.01
0.1
0.01
0.001
SINGLE PULSE
( THERMAL RESPONSE )
τ_{J τJ}
τ_{1 τ1}
R_1R1
Ci= τi/Ri
Ci= τi/Ri
R_2R2
τ_{2 τ2}
R_3R3
Ri (°C/W)
τ_{AτA 6.734}
τ_{3 τ3}
27.268
τi (sec)
0.027848
1.3813
16.003 53
0.0001
1E-006
1E-005
0.0001
0.001
0.01
0.1
1
t1 , Rectangular Pulse Duration (sec)
10
100
1000
Fig 11. Maximum Effective Transient Thermal Impedance, Junction-to-Ambient
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