TMS320F28375DPZP datasheet(59/226 Pages) TI

59 / 226 page

(2)

lfm = linear feet per minute

8.7.3 PZP Package

°C/W(1)

AIR FLOW (lfm)(2)

RΘJC

Junction-to-case thermal resistance

4.3

N/A

RΘJB

Junction-to-board thermal resistance

5.9

N/A

RΘJA (High k PCB)

Junction-to-free air thermal resistance

19.1

RΘJMA

Junction-to-moving air thermal resistance

14.3

150

12.8

250

11.4

500

PsiJT

Junction-to-package top

0.03

0.09

150

0.12

250

0.20

500

PsiJB

Junction-to-board

6.0

5.5

150

5.5

250

5.3

500

(1)

These values are based on a JEDEC-defined 2S2P system (with the exception of the Theta JC [RΘJC] value, which is based on a

JEDEC-defined 1S0P system) and will change based on environment as well as application. For more information, see these EIA/

JEDEC standards:

•

JESD51-2, Integrated Circuits Thermal Test Method Environmental Conditions - Natural Convection (Still Air)

•

JESD51-3, Low Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages

•

JESD51-7, High Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages

•

JESD51-9, Test Boards for Area Array Surface Mount Package Thermal Measurements

(2)

lfm = linear feet per minute

8.8 Thermal Design Considerations

Based on the end application design and operational profile, the IDD and IDDIO currents could vary. Systems that

exceed the recommended maximum power dissipation in the end product may require additional thermal

enhancements. Ambient temperature (TA) varies with the end application and product design. The critical factor

that affects reliability and functionality is TJ, the junction temperature, not the ambient temperature. Hence, care

should be taken to keep TJ within the specified limits. Tcase should be measured to estimate the operating

junction temperature TJ. Tcase is normally measured at the center of the package top-side surface. The thermal

application report Semiconductor and IC Package Thermal Metrics helps to understand the thermal metrics and

definitions.

www.ti.com

TMS320F28379D, TMS320F28379D-Q1, TMS320F28378D, TMS320F28377D

TMS320F28377D-Q1, TMS320F28376D, TMS320F28375D, TMS320F28374D

SPRS880O – DECEMBER 2013 – REVISED FEBRUARY 2021

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