Hi Experts:
Our customer design want to keep RTC timer always work at board. TDA4x EVM board do not use TPS659413 pin 36 VBACKUP.
Customer want to use 12V -> 3V LDO keep power supply for TPS659413 Vbackup pin to store RTC timer when 1st power supply turn off.
Whether this method work?
Best Regards!
Han Tao
