TAS5721_17 Datasheet, PDF (69/78 Pages) Texas Instruments – Digital Audio Power Amplifier With EQ, DRC, 2.1 Support, and Headphone/Line Driver

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12.2 Layout Example
Wide open areas for
thermal flow
TAS5721
SLOS739A – JULY 2012 – REVISED MARCH 2016
Bulk Capacitor for
good audio
decoupling close to
PVDD source
Refer to SLOA119
for a detailed
description of the
filter design
0.01µF
1
PVDD
2
3
220µF
4
Wide space
between driver
output traces
Driver Output
0.1µF
5
6
7
8
9
10
1µF
11
10KΩ
10KΩ
12
1µF
13
3.3V
14
4.7µF ^0.1µF
15
16
47nF
17
10KΩ
10KΩ
18
470Ω
4700pF
19
20
21
470Ω
22
1.5µF 1.5µF
23
47nF
4700pF
24
3.3V
Solid GND plane with vias ^4.7µF
0.1µF
close to decoupling points
for low impedance return
path
18.0KΩ
0.1µF
4.7µF
TAS5721
0.01µF 0.01µF
48
47
46
45
High Frequency
44
Decupling Capacitor
43
0.01µF
placed as close as
42
0.1µF
41
possible to the device
40
39
1µF
38
37
2200pF
PVDD _220µF
36
0.1µF
35
34
0.1µF
33
32
4.7µF
31
Star routing for better
thermal performance
30
3.3V
29
28
27
26
25
Several Via connection
between top and bottom
ground layers for EMI and
Thermal performance
HP/Line Driver
Input
System Processor
Top Layer Ground Plane
Top Layer Traces
Pad to Top Layer Ground Plane
PowerPAD
Via to Ground Plane
V _{Via to Power Supply Plane}
Figure 82. Layout Recommendation
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