公开(公告)号：US20180109179A1

公开(公告)日：2018-04-19

申请号：US15296733

申请日：2016-10-18

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： XIAOCHUN ZHAO ,  HASIBUR RAHMAN ,  ARTUR LEWINSKI ,  Tulong Yang

IPC分类号： H02M3/07

CPC分类号： H02M3/07 ,  H02M3/1582 ,  H03K2217/0081

摘要： A circuit includes a charge pump to generate an output reference voltage. A first bootstrap refresh circuit receives the reference voltage from the charge pump and is coupled between first and second bootstrap nodes of a DC/DC converter. The first bootstrap refresh circuit supplies first charge current that is sourced from the first bootstrap node to the second bootstrap node based on a control signal indicating a first operating mode of the DC/DC converter. A second bootstrap refresh circuit receives the reference voltage from the charge pump and is coupled between the first and second bootstrap nodes of the DC/DC converter. The second bootstrap refresh circuit supplies second charge current from the second bootstrap node to the first bootstrap node based on the control signal indicating a second operating mode of the DC/DC converter.