ZHCSH28C September 2017 – May 2025 TPA3221
PRODUCTION DATA
The TPA3221 does not require a power-down sequence. The device remains fully operational as long as the VDD, AVDD and PVDD voltages are above the undervoltage protection (UVP) voltage thresholds (see the Section 6.5 table of this data sheet). Although not specifically required, a good practice is to hold RESET low during power down, thus preventing audible artifacts including pops or clicks by initiating a controlled ramp down sequence of the output voltage. The ramp down sequence completes once the CMUTE node is discharged.