Diodes FMMT491Q - Manual (Page 3)

FMMT491Q
Document number: DS37009 Rev. 1 - 2
3 of 7
www.diodes.com
March 2014
© Diodes Incorporated
FMMT491Q
A Product Line of
Diodes Incorporated
Thermal Characteristics and Derating Information
0 20 40 60 80 100 120 140 160
0.0
0.1
0.2
0.3
0.4
0.5
0.6
15 x 15mm FR4 1oz Copper
Derating Curve
Temperature (°C) M
a
x P
o
w
e
r D
issi
p
at
io
n
(W
)
100µ 1m 10m 100m 1 10 100 1k
0
40
80
120
160
200
240
15 x 15mm FR4 1oz Copper
Transient Thermal Impedance
D=0.5
D=0.2
D=0.1
Single Pulse
D=0.05
T
her
m
a
l R
e
si
st
anc
e (
°C/
W)
Pulse Width (s)
100µ 1m 10m 100m 1 10 100 1k
0.1
1
10
100
15 x 15mm FR4 1oz Copper
Pulse Power Dissipation
Pulse Width (s) M
a
x P
o
wer
Di
ss
ipat
ion (
W
)