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STPA003 Fiches technique(PDF) 21 Page - STMicroelectronics

No de pièce STPA003
Description  4 x 52 W quad bridge power amplifier with high side driver and low voltage operation
PDF  25 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STPA003 Fiches technique(HTML) 21 Page - STMicroelectronics

Back Button STPA003 Datasheet HTML 17Page - STMicroelectronics STPA003 Datasheet HTML 18Page - STMicroelectronics STPA003 Datasheet HTML 19Page - STMicroelectronics STPA003 Datasheet HTML 20Page - STMicroelectronics STPA003 Datasheet HTML 21Page - STMicroelectronics STPA003 Datasheet HTML 22Page - STMicroelectronics STPA003 Datasheet HTML 23Page - STMicroelectronics STPA003 Datasheet HTML 24Page - STMicroelectronics STPA003 Datasheet HTML 25Page - STMicroelectronics  
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DS10473 Rev 2
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STPA003
General information
24
5.5
Heat sink definition
Assuming we have a maximum dissipated power of 26 W (e.g. in the worst case situation of
frequent clipping occurrence), considering Tj max is 150 °C and assuming ambient
temperature is 70 °C, the available temperature gap for a correct dissipation is 80 °C.
This means the thermal resistance of the system Rth has to be 80 °C/26 W = 3 °C/W.
The junction to case thermal resistance is 1 °C/W. So the heat sink thermal resistance
should be approximately 2 °C/W. This would avoid any thermal shutdown occurrence even
after long-term and full-volume operation.



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