ZHCSH28B September 2017 – December 2017 TPA3221
PRODUCTION DATA.
The UVP, OVP and POR circuits of the TPA3221 fully protect the device in any power-up/down, and brownout situation, and also in overvoltage situation with PVDD not exceeding the values stated in Absolute Maximum Ratings. While powering up, the POR circuit ensures that all circuits are fully operational when the AVDD supply voltage reaches the value stated in the Electrical Characteristics table. 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. In case of an OVP event, all half-bridge outputs are immediately set in the high-impedance (Hi-Z) state and FAULT is asserted low until PVDD is below the OVP threshold.