TAS5614LA
www.ti.com
SLAS846 –MAY 2012
APPLICATION INFORMATION
PCB MATERIAL RECOMMENDATION
FR-4 Glass Epoxy material with 1 oz. (35 μm) is recommended for use with the TAS5614LA. The use of this
material can provide for higher power output, improved thermal performance, and better EMI margin (due to
lower PCB trace inductance.
PVDD CAPACITOR RECOMMENDATION
The large capacitors used in conjunction with each full-bridge, are referred to as the PVDD Capacitors. These
capacitors should be selected for proper voltage margin and adequate capacitance to support the power
requirements. In practice, with a well designed system power supply, 1000 μF, 50 V should support most
applications. The PVDD capacitors should be low ESR type because they are used in a circuit associated with
high-speed switching.
DECOUPLING CAPACITOR RECOMMENDATION
To design an amplifier that has robust performance, passes regulatory requirements, and exhibits good audio
performance, good quality decoupling capacitors should be used. In practice, X5R or better should be used in
this application.
The voltage of the decoupling capacitors should be selected in accordance with good design practices.
Temperature, ripple current, and voltage overshoot must be considered. This fact is particularly true in the
selection of the close decoupling capacitor that is placed on the power supply to each half-bridge. It must
withstand the voltage overshoot of the PWM switching, the heat generated by the amplifier during high power
output, and the ripple current created by high power output. A minimum voltage rating of 50V is required for use
with a 36 V power supply.
See the TAS5614LADDVEVM User's Guide for more details including layout and Bill-of-Materials.
Copyright © 2012, Texas Instruments Incorporated
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