We're currently evaluating the suitability of the LM5170 as a 2 or 4 phase buck only constant current power supply. I've noticed that the scope of the supporting design documention is very focused on battery applications which has made it difficult to determine it's suitability for a more "clean" supply to a load. The load is transient sensitive and will not tolerate overshoot of current beyond the set limit and will require a small ripple.
Here is quick summary of the application: HV-Port will accept a nominal 48V input, channels 1 & 2 configured for buck mode forming a unidirectional constant current supply for a 50A load on the LV-port, compliance voltage of approximately 24V. A microcontroller interface will be utilised for control and supervision of the LM5170 and feedback from the load.
The independent analog current control for channel 1 & 2 make this controller quite appealing at face value and greatly simplify constant current SMPS, but I'm having a difficult time determining how well suited it is as a more classical multiphase buck converter like the high current low voltage systems for processors as opposed to more tolerant, rugged loads like batteries.
I notice the datasheet does not include any calculation for determining Cout with respect to a target ripple, could someone assist with the multiphase equation? In addition, does external triggering of nFAULT trip the breaker feature?
