ZHCSH28C September 2017 – May 2025 TPA3221
PRODUCTION DATA
To design an amplifier that has robust performance, passes regulatory requirements, and exhibits good audio performance, good quality decoupling capacitors is used. In practice, X7R is used in this application.
The voltage of the decoupling capacitors is 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 1μF that is placed on the power supply to each full-bridge. The power supply 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 30V power supply.