Patent ID: 7439717

Claim:
A secondary side buck post regulator for a second output of a multi-output forward converter comprising, a first coupled inductor having a first winding and a second winding with an undotted terminal of said first winding connected to a first output of said multi-output forward converter and with said second winding connected in series with said second output of said multi-output forward converter, a second inductor connected in series with said second winding of said first coupled inductor, first switch means having a drain terminal connected to a dotted terminal of said first winding of said first coupled inductor, second switch means, operable substantially in anti-synchronization to said first switch means, having a source terminal connected to an output terminal, which is common to said first output and to said second output of said multi-output forward converter and having a drain terminal connected to a source terminal of said first switch means and connected to a series winding network comprising said second inductor and said second winding of said first coupled inductor, whereby said secondary side buck post regulator provides a second precisely regulated output with reduced magnetics volume and cost.