Some systems that use the TPA2051D3 have the capability of applying AVDD and PVDD supplies while DVDD is disabled. in these systems, when the TPA2051D3 has AVDD and PVDD supplied but DVDD is not applied (e.g. GND or floating), a leakage current of up to 1-2 mA can occur. The occurrence of this leakage is random and cannot be screened in test.

To avoid this leakage current, follow the recommended startup procedure provided in the datasheet: apply DVDD within 100us of applying AVDD and PVDD. In systems without this control, a resistive divider network from AVDD/PVDD to DVDD is recommended.

The attached report explains this issue in detail and also gives specific examples of how to prevent this leakage from occurring.

 

3482.TPA2051D3 Leakage Report.pdf