6.4 Thermal Characteristics
THERMAL METRIC(1) |
DCA (48 PINS) |
UNITS |
Special Test Case |
JEDEC Standard 2-Layer PCB |
JEDEC Standard 4-Layer PCB |
TAS5751MEVM |
θJA |
Junction-to-ambient thermal resistance(2) |
|
49.9 |
26.2 |
24.0 |
°C/W |
θJCtop |
Junction-to-case (top) thermal resistance(3) |
14.9 |
|
|
|
°C/W |
θJB |
Junction-to-board thermal resistance(4) |
6.9 |
|
|
|
°C/W |
ψJT |
Junction-to-top characterization parameter(5) |
|
1.1 |
0.8 |
0.7 |
°C/W |
ψJB |
Junction-to-board characterization parameter(6) |
|
10.8 |
6.8 |
1.7 |
°C/W |
θJCbot |
Junction-to-case (bottom) thermal resistance(7) |
1.7 |
|
|
|
°C/W |
(1) For more information about traditional and new thermal metrics, see the
Semiconductor and IC Package Thermal Metrics application report (
SPRA953).
(2) The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as specified in JESD51-7, in an environment described in JESD51-2a.
(3) The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDEC-standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
(4) The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB temperature, as described in JESD51-8.
(5) The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted from the simulation data for obtaining RθJA, using a procedure described in JESD51-2a (sections 6 and 7).
(6) The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted from the simulation data for obtaining RθJA, using a procedure described in JESD51-2a (sections 6 and 7).
(7) The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
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