DCM or CCM Flyback Converter for Battery Charging

[fethiyeli]

Hi. I would like to design a flyback converter that will be used for charging three batteries. I couldnt decide whether to choose CCM or DCM. I looked up some books but they say different things about them. I chose FPS IC that includes internal mosfet. I have all necessary equations about converter but i need to decide DCM or CCM. Output power will be
3 x (13.6V x 0.7A) = 28.56W. 0.7A is charging current for a battery. Multiplied by 3 due to three batteries. Parallel charging will be used. Thnx.

 

[pradeep.g.belchada]

use a ccm method battery needs a constant current

 

[fethiyeli]

PFC circuit feeds the flyback converter and input voltage of flyback converter varies between 350VDC and 415VDC. In this high voltage case, DCM is recommended as i know but i dont know what to select for this converter. What about quasi resonant ?