公开(公告)号：US20200014192A1

公开(公告)日：2020-01-09

申请号：US16503113

申请日：2019-07-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Bhaskar RAMACHANDRAN ,  Dattatreya BARAGUR SURYANARAYANA ,  Vishal GUPTA

IPC: H02H3/38 ,  G01R19/165 ,  H02J7/34 ,  H02M3/07

Abstract: A system includes a first transistor having a first control input and first and second current terminals. The first current terminal couples to an input voltage node. A second transistor has a second control input and third and fourth current terminals. The third current terminal couples to the second current terminal at a first node. The fourth current terminal couples to an output voltage node. A drive circuit is configured to charge a capacitor maintain the first transistor in an off state responsive to a negative voltage on the input voltage node, and, responsive to a negative voltage on the input voltage node, to cause the charge from the capacitor to be used to turn off the first transistor. The system provides a voltage to a load coupled to the output voltage node.