FAB3103 Datasheet, PDF (11/13 Pages) Fairchild Semiconductor – 2.3 Watt Class-D Audio Amplifier with Integrated Boost Regulator and Automatic Gain Control

Applications Information
Layout Considerations
General layout and supply bypassing play a major role
in analog performance and thermal characteristics.
Fairchild offers an evaluation board to guide layout and
aid device evaluation. Contact a Fairchild representative
for information about evaluation boards. Following the
recommended layout configuration (shown in Figure 16)
provides optimum performance for the device. For best
results, follow the steps and recommended routing rules
listed below.
Recommended Routing / Layout Rules
 Do not run analog and digital signals in parallel.
 Traces must run on top of the ground plane.
 Avoid routing at 90° angles.
 Place bypass capacitors within 2.54mm
(0.1 inches) of the device power pin.
 Minimize all trace lengths to reduce series
inductance.
 Connect BGND, PGND, and AGND together using
a single ground plane.
Figure 16. Recommended PCB Layout
Table 1 – Recommended Passive Components
Component
LSW
CPVDD
CVBATT
Vendor
Murata
Murata
Murata
Part Number
LQM2HPN2R2NJCL
GRM21AR60J226UE80K
GRM188R60J106UE82J
Value
2.2µH
22µF
10µF
© 2011 Fairchild Semiconductor
FAB3103 • Rev. 1.0.2
11
www.fairchildsemi.com