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TPS61256CYFFT Datasheet(PDF) 19 Page - Texas Instruments |
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TPS61256CYFFT Datasheet(HTML) 19 Page - Texas Instruments |
19 / 29 page 19 TPS61256C www.ti.com SLVSDQ1 – FEBRUARY 2017 Product Folder Links: TPS61256C Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 12.3 Thermal Considerations Implementation of integrated circuits in low-profile and fine-pitch surface-mount packages typically requires special attention to power dissipation. Many system-dependent issues such as thermal coupling, airflow, added heat sinks and convection surfaces, and the presence of other heat-generating components affect the power- dissipation limits of a given component. Three basic approaches for enhancing thermal performance are listed below: • Improving the power dissipation capability of the PCB design • Improving the thermal coupling of the component to the PCB • Introducing airflow in the system As power demand in portable designs is more and more important, designers must figure the best trade-off between efficiency, power dissipation and solution size. Due to integration and miniaturization, junction temperature can increase significantly which could lead to bad application behaviors (i.e. premature thermal shutdown or worst case reduce device reliability). Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where the high maximum power dissipation exists, special care must be paid to thermal dissipation issues in board design. The device operating junction temperature (TJ) should be kept below 125°C. |
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