公开(公告)号：US09929659B2

公开(公告)日：2018-03-27

申请号：US15066917

申请日：2016-03-10

Applicant: STMicroelectronics S.R.L.

Inventor： Maurizio Foresta ,  Alberto Iorio

IPC: H02M3/335 ,  H02M1/08 ,  H02M3/337 ,  H03K17/06 ,  H02M1/00

CPC classification number: H02M3/33546 ,  H02M1/08 ,  H02M3/33592 ,  H02M3/3378 ,  H02M2001/0058 ,  H03K17/063 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A driver circuit for synchronous rectifier electronic switches, such as SR MOSFETs in resonant converters controls a pair of synchronous rectifier electronic switches to apply thereto a drive voltage to switch the synchronous rectifier electronic switches on and off synchronously with a converter current. The driver circuit includes a programming module to produce a first signal indicative of the figure of merit of the synchronous rectifier electronic switches, and, optionally, a current sensing module to produce a second signal indicative of the output current of the synchronous rectifier electronic switches. An output module is included to generate a value for the drive voltage which is a function of the first signal indicative of the figure of merit and, optionally, of the second signal indicative of the output current of the synchronous rectifier electronic switches.