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DRV8824 Datasheet(PDF) 5 Page - Texas Instruments

Part # DRV8824
Description  DRV8824 Stepper Motor Controller IC
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
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DRV8824 Datasheet(HTML) 5 Page - Texas Instruments

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DRV8824
www.ti.com
SLVSA06J – OCTOBER 2009 – REVISED JULY 2014
7.4 Thermal Information
DRV8824
THERMAL METRIC
UNIT
PWP (28 PINS)
RHD (28 PINS)
RθJA
Junction-to-ambient thermal resistance(1)
38.9
35.8
RθJC(top)
Junction-to-case (top) thermal resistance(2)
23.3
25.1
RθJB
Junction-to-board thermal resistance(3)
21.2
8.2
°C/W
ψJT
Junction-to-top characterization parameter(4)
0.8
0.3
ψJB
Junction-to-board characterization parameter(5)
20.9
8.2
RθJC(bot)
Junction-to-case (bottom) thermal resistance(6)
2.6
1.1
(1)
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.
(2)
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.
(3)
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.
(4)
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
θJA, using a procedure described in JESD51-2a (sections 6 and 7).
(5)
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
θJA , using a procedure described in JESD51-2a (sections 6 and 7).
(6)
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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