PLCC20 Datasheet, PDF (2/2 Pages) STMicroelectronics – PLCC 20

Thermal Data
PLCC 20
Rth(j-a) (ºC/W)
180
160
die pad = 140 x 140 sq.mils
die size = 80 x 120 sq.mils
140
1)
120
floating in air
100
mounted on SM PCB5A board
80
mounted on SM PCB5 board
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
dissipated power ( Watt )
Rth(j-a) (ºC/W)
105
100
2)
95
die size = 80 x 120 sq.mils
die pad = 140 x 140 sq.mils
Pd =1 W
90
85
80
75
70
0
50
100
150
200
250
300
350
on board trace area ( x 1000 sq. mils )
Transient Thermal Resistance (ºC/W)
100
SINGLE PULSE
3)
50
mounted on SM PCB5 board
Pd = 2 Watt
20
10
5
die pad = 140 x 140 sq.mils
die size = 80 x 120 sq.mils
on die dissipating area = 2000 sq.mils
2
2/2
1
0.001
0.01
0.1
1
10
Time or pulse width ( s )
100
1,000
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