DRV8821_16 Datasheet, PDF (23/32 Pages) Texas Instruments – Dual Stepper Motor Controller and Driver

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Thermal Considerations (continued)
DRV8821
SLVS912J – JANUARY 2009 – REVISED JANUARY 2016
70
65
60
55
50
45
40
Low-K PCB (2 layer)
35
30
High-K PCB (4 layer with ground plane)
25
20
0
10
20
30
40
50
60
70
80
90
Backside Copper Area - cm²
Figure 19. Thermal Resistance vs Copper Plane Area
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