公开(公告)号：US11211865B2

公开(公告)日：2021-12-28

申请号：US16799112

申请日：2020-02-24

Applicant: Texas Instruments Incorporated

Inventor： Joseph Maurice Khayat ,  Sergio Carlo-Rodriquez ,  Michael G. Amaro ,  Ramanathan Ramani ,  Pradeep S. Shenoy

IPC: H02M3/158 ,  H02M3/07

Abstract: A series capacitor buck converter includes a first half-bridge circuit including a first high side power switch (HSA) and first low side power switch (LSA) connected in series having a first switching node (SWA) therebetween which drives a first output inductor, a second half-bridge circuit including a second HS power switch (HSB) and second LS power switch (LSB) connected in series having a second switching node (SWB) therebetween which drives a second output inductor. A transfer capacitor (Ct) is connected in series with HSA and LSA and between the first and second half-bridge circuits. A first current source is coupled for precharging Ct with a charging current (I_in) and a second current source is coupled to Ct for providing an output current (I_out). A feedback network providing negative feedback forces I_out to match I_in.