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LM7480-Q1: Ideal Diode Controller won't function as expected

Part Number: LM7480-Q1

Tool/software:

Hi everyone, 

We have a battery powered design (28V LiFePO4) where the battery would be connected to the AUX power line and occasionally 24V DC wall adapter would be connected to the Primary power line, with primary having priority. We also have a charge input, to charge the battery while the system is being powered from the Primary path. LM7480-Q1 controllers are in CD configuration and follows this Priority Power MUXing from the reference. 

We have also used TIDA-010240 multi-pack smart battery charger reference design to figure out the priority muxing part. As you can see EN line from U3 is connnected to the OV line of the U4. 

Please have a look at this circuit and let me know what I'm missing or doing wrong. 

Thanks beforehand and best regards.