公开(公告)号：US10103635B2

公开(公告)日：2018-10-16

申请号：US15442886

申请日：2017-02-27

Applicant: Microchip Technology Incorporated

Inventor： Simon Krugly ,  Alexander Mednik ,  Marc Tan ,  Rohit Tirumala

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/42 ,  H02M1/00

Abstract: A high power-factor buck-boost converter having a rectified low-frequency AC line voltage input and a DC output is provided. The converter may include a magnetic element, a controlled switch having a gate terminal and a drain terminal that is coupled to the magnetic element, a rectifier diode coupled to the magnetic element, an output smoothing capacitor coupled to the rectifier diode, and a control circuit having an output coupled to the gate terminal of the controlled switch for repeatedly turning the controlled switch off for a first time duration and on for a second time duration. The second time duration may be determined as a function of the first time duration immediately preceding the second time duration.

公开(公告)号：US20170264203A1

公开(公告)日：2017-09-14

申请号：US15442886

申请日：2017-02-27

Applicant: Microchip Technology Incorporated

Inventor： Simon Krugly ,  Alexander Mednik ,  Marc Tan ,  Rohit Tirumala

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M1/4258 ,  H02M2001/0003 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02M2001/0054 ,  Y02B70/126 ,  Y02B70/1491

Abstract: A high power-factor buck-boost converter having a rectified low-frequency AC line voltage input and a DC output is provided. The converter may include a magnetic element, a controlled switch having a gate terminal and a drain terminal that is coupled to the magnetic element, a rectifier diode coupled to the magnetic element, an output smoothing capacitor coupled to the rectifier diode, and a control circuit having an output coupled to the gate terminal of the controlled switch for repeatedly turning the controlled switch off for a first time duration and on for a second time duration. The second time duration may be determined as a function of the first time duration immediately preceding the second time duration.