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AN4569 Datasheet(PDF) 26 Page - STMicroelectronics

Part # AN4569
Description  The purpose of the document is to show different possibilities
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4569 Datasheet(HTML) 26 Page - STMicroelectronics

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AN4569
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DocID026803 Rev 1
4.5
Thermal dissipation
To dissipate heat, it is mandatory to have a big ground plane on both (top and bottom)
layers and solder the slug on the PCB;
Figure 33. Thermal dissipation
Thermal layout with big ground (1/3 for top and bottom layers)
Figure 34. Thermal layout for top and bottom layer
Thermal layout with large ground (2/3 for thermal and soldering holes)
Figure 35. Thermal dissipation - holes under IC
The thermal resistance junction in the bottom of the STA3xyBWz in order to maintain
ambient temperature is obtainable with a ground copper area of 4x4 cm and with 24 via
holes (refer to the example shown in the figure above).



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