公开(公告)号：US20220302840A1

公开(公告)日：2022-09-22

申请号：US17697008

申请日：2022-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rida Shawky ASSAAD ,  Angelo William PEREIRA ,  Gangqiang ZHANG ,  Kae Ann WONG

IPC: H02M3/158 ,  H02M1/08

Abstract: In a switching regulator driver, a sense circuit has a transistor current input and a sense circuit output. A logic circuit has a logic circuit input and first and second outputs. The logic circuit input is coupled to the sense circuit output. A counter has a counter clock input, a counter control input and a counter output. The counter clock input is coupled to the first output. The counter control input is coupled to the second output. The counter is configured to provide a count value at the counter output. A programmable drive strength circuit has a drive strength circuit input and a transistor control output. The drive strength circuit input is coupled to the counter output. The programmable drive strength circuit is configured to adjust a drive current at the transistor control output based on the count value.

公开(公告)号：US20150309087A1

公开(公告)日：2015-10-29

申请号：US14699554

申请日：2015-04-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Gangqiang ZHANG

IPC: G01R19/00 ,  G01R31/26

CPC classification number: G01R19/16571 ,  H03K2217/0027 ,  H03K2217/0063

Abstract: An overcurrent detector that includes a sense transistor connected to a sense resistor, a second transistor matched to the sense transistor and connected in parallel to a second resistor, and a voltage comparator coupled to the sense transistor and second resistor. The sense transistor is configured to connect in a same gate and source connection with a driver output transistor. The second transistor and second resistor are configured to receive a current reference and generate a voltage reference. The voltage comparator is configured to compare the voltage reference with a voltage drop across the sense resistor.

Abstract translation: 一种过电流检测器，包括连接到检测电阻器的检测晶体管，与感测晶体管匹配并与第二电阻器并联连接的第二晶体管，以及耦合到检测晶体管和第二电阻器的电压比较器。 感测晶体管被配置为以与驱动器输出晶体管相同的栅极和源极连接来连接。 第二晶体管和第二电阻被配置为接收电流参考并产生电压参考。 电压比较器被配置为将电压参考值与检测电阻器两端的电压降进行比较。