Datasheet

© 2011 Fairchild Semiconductor www.fairchildsemi.com
FAB3103 • Rev. 1.0.2 11
FAB3103 — 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 Vendor Part Number Value
L
SW
Murata LQM2HPN2R2NJCL 2.2µH
C
PVDD
Murata GRM21AR60J226UE80K 22µF
C
VBATT
Murata GRM188R60J106UE82J 10µF