HA16138PS Datasheet, PDF (14/20 Pages) Hitachi Semiconductor – AC/DC Switching Converter Controller IC With High-Voltage Power MOS FET

HA16138PS
Thermal Resistance θj-a and Maximum Power Dissipation vs.
Printed Circuit Board Copper Heat Sink Perimeter Length
120
2.5
100
2.0
Pt(max) for Ta = +85°C
80
1.5
60
1.0
θj-a
40
0.5
20
0
0
10
20
30
40
50
Length of copper, L (mm)
Pin holes
2.0 oz copper heat sink
L
Glass-epoxy
printed circuit board
Wiring pattern
Figure 7 Sample Printed Circuit Board Copper Heat Sink Pattern
14