SBVS425A december 2022 – may 2023 TPS748A-Q1
PRODUCTION DATA
By using the thermal metrics ΨJT and ΨJB, as shown in the Thermal Information table, the junction temperature can be estimated with corresponding formulas (given in Equation 6). For backwards compatibility, an older θJC(top) parameter is listed as well.
where:
For more information about measuring TT and TB, see the Using New Thermal Metrics application note, available for download at www.ti.com.
For a more detailed discussion of why TI does not recommend using θJC(top) to determine thermal characteristics, see the Using New Thermal Metrics application note, available for download at www.ti.com. For further information, see the Semiconductor and IC Package Thermal Metrics application note, also available on the TI website.