Datasheet

IRF7907PbF
www.irf.com 7
Fig 25. Maximum Effective Transient Thermal Impedance, Junction-to-Ambient (Q1)
Fig 26. Maximum Effective Transient Thermal Impedance, Junction-to-Ambient (Q2)
Fig 27. Layout Diagram
L
C
o
C
in
D1
D1
D2
D2
S1
G1
S2
G2
5
6
7
8
4
3
2
1
V
in
V
o
GND
1E-006 1E-005 0.0001 0.001 0.01 0.1 1 10 100
t
1
, Rectangular Pulse Duration (sec)
0.01
0.1
1
10
100
T
h
e
r
m
a
l
R
e
s
p
o
n
s
e
(
Z
t
h
J
A
)
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 Zthja + Ta
Ri (°C/W)
τι
(sec)
2.288789 0.000137
7.167906 0.014957
36.98193 0.72461
16.07333 26.8
τ
J
τ
J
τ
1
τ
1
τ
2
τ
2
τ
3
τ
3
R
1
R
1
R
2
R
2
R
3
R
3
Ci
i
/
Ri
Ci= τi/Ri
τ
a
τ
4
τ
4
R
4
R
4
1E-006 1E-005 0.0001 0.001 0.01 0.1 1 10 100
t
1
, Rectangular Pulse Duration (sec)
0.01
0.1
1
10
100
T
h
e
r
m
a
l
R
e
s
p
o
n
s
e
(
Z
t
h
J
A
)
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 Zthja + Ta
Ri (°C/W)
τι (sec)
1.848416 0.000164
11.29818 0.054158
34.97452 0.9598
14.3858 38.2
τ
J
τ
J
τ
1
τ
1
τ
2
τ
2
τ
3
τ
3
R
1
R
1
R
2
R
2
R
3
R
3
Ci
i
/
Ri
Ci= τi/Ri
τ
a
τ
4
τ
4
R
4
R
4