Derating curve, Transient thermal impedance, Pulse power dissipation – Diodes BCX54 /55 /56 User Manual
Page 3: Thermal characteristics and derating information
BCX54 / 55 / 56
Datasheet Number: DS35369 Rev. 6 – 2
3 of 7
March 2014
© Diodes Incorporated
BCX54 /55 /56
Thermal Characteristics and Derating Information
0
20
40
60
80 100 120 140 160
0.0
0.2
0.4
0.6
0.8
1.0
25mm x 25mm 1oz Cu
Derating Curve
Temperature (°C)
M
a
x P
o
wer Di
ss
ip
at
ion (W)
100µ
1m
10m 100m
1
10
100
1k
0
20
40
60
80
100
120
25mm x 25mm 1oz Cu
T
amb
=
25°C
Transient Thermal Impedance
D=0.5
D=0.2
D=0.1
Single Pulse
D=0.05
T
herm
a
l Resi
st
anc
e (°
C/
W)
Pulse Width (s)
100µ
1m
10m 100m
1
10
100
1k
1
10
100
25mm x 25mm 1oz Cu
T
amb
=
25°C
Single pulse
Pulse Power Dissipation
Pulse Width (s)
M
a
x P
o
wer Di
ss
ip
at
ion (W)
0
500
1000
1500
2000
2500
0
1
2
3
0
500
1000
1500
2000
2500
40.0
60.0
80.0
100.0
120.0
140.0
2oz copper
1oz copper
T
amb
=25°C
Copper Area (sqmm)
Ma
xi
mu
m P
o
w
er
(
W
)
2oz copper
1oz copper
T
amb
=25°C
Copper Area (sqmm)
T
h
e
rm
a
l R
e
si
st
an
ce
(
°C
/W)