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NJU6391 XF200 P87C5 P4SMA SRF860 MA10A 4633MJ F160S3
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To Download LB-20 Datasheet File

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  Datasheet File OCR Text:
 Effect of PWB Copper Area on Thermal Performance of 20-Lead SOIC LB Package
Thermal Resistance (RJA) vs. Copper Area on PWB
100
Thermal Resistance (0C/W)
One side Copper Two side Copper
90 80 70 60 50 40 0 1
2
3
4
Area of Copper on Board (in2)
Variable Copper Area Test Board
Red-hatched area is copper on the surface of the PWB
Copper Area Must Be Connected to Package Ground Leads
The 20 lead LB package has 4 ground leads as shown. Additional copper area must be connected to these leads. 16 15
5
6
Using a Double-Layer PWB
For the double-layer copper board, the copper area on the bottom is identical to the area on the top. Both the top and bottom layers are thermally connected through vias placed on each ground lead.


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