OVER CURRENT PROTECTION CIRCUIT

摘要

The over current protection circuit is coupled to a current path between an output end of a switch and a load. The over current protection circuit includes a first over current detection unit, a second over current detection unit and a control unit. The first over current detection unit is disposed between the current path and a first voltage, and generates a first control signal according to a current in the current path. The second over current detection unit is disposed between the current path and a second voltage, and generates a second control signal according to a current in the current path. The control unit is coupled with the first over current detection unit and the second over current detection unit, and controls the switch according to the first control signal or the second control signal to reduce the current in the current path.

主权项

1. An over current protection circuit, comprising:
a switch having a first end and a second end, wherein the first end receives an input voltage from a power supply to generate an output voltage in the second end; a current path disposed between the second end and a load, wherein the output voltage is provided to a load through the current path; a first over current detection unit coupled between the current path and a first voltage, wherein the first over current detection unit generates a first control signal according to a current in the current path; a second over current detection unit coupled between the current path and a second voltage, wherein the second over current detection unit generates a second control signal according to a current in the current path; and a control unit coupled with the first over current detection unit and the second over current detection unit, wherein the control unit controls the switch according to the first control signal or the second control signal to reduce a current in the current path.