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DRV8889-Q1 Datasheet(PDF) 63 Page - Texas Instruments

Part No. DRV8889-Q1
Description  DRV8889-Q1, DRV8889A-Q1 Automotive Stepper Driver with Integrated Current Sense, 1/256 Micro-Stepping, and Stall Detection
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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DRV8889-Q1 Datasheet(HTML) 63 Page - Texas Instruments

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Table 8-3. PCB Type and Copper Thickness
PCB Type
Copper Thickness
Top Layer
Bottom Layer
Mid-Layer 1
Mid-Layer 2
2-Layer
1-oz PCB
1-oz
1-oz
N/A
2-oz PCB
2-oz
2-oz
4-Layer
1-oz PCB
1-oz
1-oz
1-oz
1-oz
2-oz PCB
2-oz
2-oz
1-oz
1-oz
Figure 8-13. PCB - Top Layer (4/2-Layer PCB) for
HTSSOP Package
Figure 8-14. PCB - Top Layer (4/2-Layer PCB) for
VQFN Package
Table 8-4. PCB Dimension for HTSSOP package
COPPER AREA (cm2)
DIMENSION (A) (mm)
1 cm2
13.31 mm
2 cm2
17.64 mm
4 cm2
23.62 mm
8 cm2
31.98 mm
16 cm2
43.76 mm
32 cm2
60.36 mm
Table 8-5. PCB Dimension for VQFN package
COPPER AREA (cm2)
DIMENSION (A) (mm)
1 cm2
10.00 mm
2 cm2
14.14 mm
4 cm2
20.00 mm
8 cm2
28.28 mm
16 cm2
40.00 mm
32 cm2
56.57 mm
8.2.4.3 Thermal Parameters for HTSSOP Package
The variation of thermal parameters such as the RθJA (Junction-to-Ambient Thermal Resistance) and ΨJB
(Junction-to-Board Characterization Parameter) is highly dependent on the PCB type, package type, copper
thickness and the copper pad area.
www.ti.com
DRV8889-Q1
SLVSEE9C – APRIL 2020 – REVISED AUGUST 2020
Copyright © 2020 Texas Instruments Incorporated
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