Other Parts Discussed in Thread: UCC28780
One more clarification on the use of UCC24612 .
One would conclude from Fig 17 of the datasheet that in every cycle when the main switch goes OFF, there is an implicit assumption that there is a diode( in this instance, the body diode) that has to conduct for a short time to begin the process of turning ON the SR.
In such a case, what would be requirements imposed on the body diode?
If the implicit assumption is not true, then how does the sr ON time begin if at time =0 which marks the beginning of the secondary current there is no conductive return path ( assuming SR on the low side) at t=0
We have a design in the works that will have a load of 20 amps. Including the capacitor charging, peak currents will be high. So there needs to be attention paid on this body diode.
thnx
robin