regardless to using topology,
suppose i want to make 1 stage charger, in iron normal transformer, if I put 220 to primary I will get 14.5 to secondary , when put this output to battery the voltage decrease under load and over the time the voltage will increase during charging.
in smps we use pwm with duty cycle , so how to set this duty cycle to get 14.5 volt, if I use feedback from voltage the feedback will compensate voltage under load, so battery will not charge or will be in floating mode