SLOS814D March 2014 – September 2016 TAS5421-Q1
A car battery that can have a large voltage range most commonly provides power for the device. PVDD, a filtered battery voltage, is the supply for the output FETs and the low-side FET gate driver. Good power-supply decoupling is necessary, especially at low voltage and temperature levels. To meet the PVDD specifications in the Electrical Characteristics section, TI uses 10-µF and 0.1-µF ceramic capacitors near the PVDD pin along with a larger bulk 330-µF electrolytic decoupling capacitor.
An internal linear regulator, which powers the analog circuitry, provides the voltage on the BYP pin. This supply requires an external bypass ceramic capacitor at the BYP pin.