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PowerUsing Case temperature T T J C JT Estimating …

One-Page thermal Reference Sheet, Revised Sept 2013 Copyright 2013 texas instruments thermal Calculations Measuring parts on a PCB: Using Case temperature Estimating Tj for a new design (options): Using PCB temperature System thermal modeling PCB calculator 2R or Delphi model Approximations based on existing device/system Where: Tj= Junction Temp: max for performance, reliability, etc. Tc= Case temperature (measured) Power: estimated or measured power Psi-JT/ JT: thermal delta, device to case/top, in system Psi-JB/ JB : thermal delta, device to PCB, in system, near device Description and Use of Common Terms: Theta-JA: (Tj Ta) / Power.

Title: Thermal Reference Sheet Analog Author: Texas Instruments, Incorporated [SLRR012,*] Subject: Technical Brief Keywords,SLRR012 Created Date

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