ZHCSH28C September 2017 – May 2025 TPA3221
PRODUCTION DATA
The UVP and POR circuits of the TPA3221 protect the device in specific power-up/down and brownout situations. While powering up, the POR circuit ensures that all circuits are fully operational when the AVDD supply voltage reaches the value stated in Electrical Characteristics. Although AVDD is independently monitored, a supply voltage drop below the UVP threshold on AVDD pin results in all half-bridge outputs immediately being set in the high-impedance (Hi-Z) state and FAULT being asserted low. The device automatically resumes operation when all supply voltages have increased above their UVP threshold. Overvoltage protection is disabled in TPA3221.