Tool/software:
Hello everyone,
I am using the TPS24742EVM-667 Evaluation Module in priority Muxing arrangement. I have given the shorted VIN_OV_A to VIN_OV_B and changed values of R9_B and R17_B to 10k and 1.3k respectively to set an OV threshold of 11.4V. The R10_A and R20_A are changed values to 10k and 1.3k respectively with threshold of 11.4V. When both the primary and secondary supply are set at 12V and the primary supply voltage is reduced slowly, at 11.8V-11.6V there occurs power sharing is both the power supplies. And when the voltage of Primary supply is further reduced, there occurs reverse current supply in primary and primary voltage at VINA doesn't reduce further more. Even after the Primary supply is disconnected the A part remains ON due to the reverse current from Auxiliary supply. Can you please clarify what could be the root cause and how can we mitigate it.
The following block diagram shows the OV pin setting of Auxiliary supply:
The following schematic is of the A side(Primary supply):
The following schematic is of the B side(Auxiliary supply):
*the highlighted parts are changed.
