Need a Power path controller similar to LTC4414, but at 48V and 6.2 KW. since here is a change in the requirement,
Hi Suhas,
Looks like you want to achieve Priority Power Muxing. i.e. Turn ON the primary power supply irrespective of the voltage (as long as it is valid) and switch to secondary power supply when primary power supply turns OFF (or is not available).
LTC4414 does not have priority power muxing capability. To achieve Priority Power Muxing, you need to have a blocking FET also on the secondary power path to disconnect the OUT from IN when Vsecondary > Vprimary. This can be achieved by using LM74800-Q1. You can refer to 'Design # 6: Reverse Battery Protection With Priority Power MUXing' section of the Six System Architectures With Robust Reverse Battery Protection Using an Ideal Diode Controller app note to understand more.
LM74800-Q1 + back to back FETs are definitely required on the secondary power path to achieve Priority Power Muxing but in case you do not want ON/OFF control for primary power path, you can use LM74700-Q1 (which only drive diode FET) instead of LM74800-Q1.
Hi Suhas,
Even if you turn OFF the LTC4414, the body diode of the FET will conduct due to its orientation. So, it is not possible to block the forward current flow.
this is working for us