Power-supply designers usually like flyback converters to operate in DCM (discontinuous-conduction mode) rather than in CCM (continuous-conduction mode). In DCM, the flyback converter is a first-order ...

Click to Enlarge Figure 6: Output Diode Waveforms (20V/div) (Top: Flyback; Bottom: SEPIC). Click to Enlarge Figure 7 shows the efficiency of both circuits measured at two input voltages. The SEPIC ...

In the case of a flyback, the transformer is often described as a coupled inductor. Due to the diode polarity, current only flows in the secondary side during discharge.

Linear Technology’s LT3809 flyback secondary-side synchronous rectifier driver replaces the output diode forward-voltage drop with the RDS (ON) of an external N-channel MOSFET, thus reducing the ...